Plate 21.
Fig. 208. Leptorhynchoides thecatum (Linton, 1891); female, After Meyer, 1932.
Fig. 209. Idem; proboscis. Ibid.
Fig. 210. Idem; proboscis hooks. Ibid.
Fig. 211. Idem; male. Ibid.
Fig. 212. Idem; egg. Ibid.
Fig. 213. Leptorhynchoides plagiocephalus (Westrumb, 1821); male. Kostylev in Meyer, 1932. After
Fig. 214. Idem; egg. Ibid.
Fig. 215. Idem; branched hypodermic nucleus. Ibid.
Fig. 216. Hypoechinorhynchus magellanicum Szidat, 1950; proboscis.
Fig. 217. Idem; female.
Fig. 218. Idem; male.
Plate 22.
Fig. 219. Aspersentis austrinus Van Cleave, 1929; proboscis.
Fig. 220. Idem; anterior extremity.
Fig. 221. Cleaveius circumspinifer Subrahmanian, 1927; male.
Fig. 222. Idem; trunk spine.
Fig. 223. Idem; anterior extremity.
Fig. 224. Hemirhadinorhynchus leuciscus Krotov et Petrotschenko, 1956; eggs.
Fig. 225. Idem; anterior extremity.
Fig. 226. Idem; male.
Fig. 227. Micracanthorhynchina motomurai (Harada, 1935); proboscis hooks.
Fig. 228. Idem; posterior extremity of female.
Fig. 229. Idem; proboscis hooks.
Fig. 230. Idem; male.
Plate 23.
Fig. 231. Pseudorhadinorhynchus markewitschi Achmerow et Dombr.Achmer., 1941; female. After Achmerow, 1959.
Fig. 232. Idem; male. Ibid.
Fig. 233. Idem; proboscis. Ibid.
Fig. 234. Pseudorhadinorhynchus spinicaudatum (Cable et Quick, 1954); male.
Fig. 235. Idem; proboscis.
Fig. 236. Heterosentis heteracanthum (v. Linstow, 1896); male. After Meyer, 1932.
Fig. 237. Idem; female. Ibid.
Fig. 238. Idem; anterior extremity. Ibid.
Fig. 239. Micracanthorhynchina hemirhamphi (Baylis, 1944); anterior extremity. In Petrotschenko, 1958.
Fig. 240. Idem; male. Ibid.
Fig. 241. Idem; posterior extremity of female. Ibid.
Plate 24.
Fig. 242. Filicollis anatis (Schrank, 1788); male. After Petrotschenko, 1958.
Fig. 243. Idem; anterior extremity. Ibid.
Fig. 244. Idem; proboscis hooks. Ibid.
Fig. 245. Diplosentis amphacanthi Tubangui et Nlasilufigan, 1937; anterior extremity.
Fig. 246. Idem; egg.
Fig. 247. Idem; male.
Fig. 248. Idem; female.
Plate 25.
Fig. 249. Fessisentis fessus Van Cleave, 1931; anterior extremity.
Fig. 250. Idem; posterior extremity of female.
Fig. 251. Idem; posterior extremity of male.
Fig. 252. Falsifilicollis altmani (Perry, 1942); male. In Petrotschenko, 1958.
Fig. 253. Idem; anterior extremity. Ibid.
Fig. 254. Idem; part of proboscis. Ibid.
Fig. 255. Idem; egg. Ibid.
Fig. 256. Falsifilicollis sphaerocephalus (Bremser, 1821); male.
Fig. 257. Idem; posterior extremity of female. Ibid.
Fig. 258. Idem; proboscis. Ibid.
Plate 26.
Fig. 259. Polymorphus cucullatus Van Cleave et Starrett, 1940; male.
Fig. 260. Idem; anterior extremity.
Fig. 261. "Echinorhynchus" pupa Linstow, 1905; entire worm. After Meyer in Petrotschenko, 1958.
Fig. 262. Idem; egg. Ibid.
Fig. 263. Polymorphus obtusus Van Cleave, 1918; male. After Ward, 1943.
Fig. 264. Polymorphus marilis Van Cleave, 1939; male.
Fig. 265. Polymorphus trochus Van Cleave, 1945; male.
Fig. 266. Polymorphus crassus Van Cleave, 1924; anterior extremity.
Plate 27.
Fig. 267. Polymorphus mathevossianae Petrotschenko, 1949; male.
Fig. 268. Polymorphus acutis Van Cleave et Starrett, 1940; proboscis.
Fig. 269. Idem; proboscis hooks.
Fig. 270. Idem; male.
Fig. 271. Polymorphus marillis Van Cleave, 1939; proboscis. After Van Cleave and Starrett, 1940.
Fig. 272. Falsifilicollis major (Lundström, 1942); proboscis
Fig. 273. Idem; proboscis hooks.
Fig. 274. Falsifilicollis kenti (Van Cleave, 1947); anterior extremity.
Fig. 275. Polymorphus magnus Skrjabin, 1913; proboscis of female.
Fig. 276. Idem; egg.
Fig. 277. Idem; female showing lacunar system.
Fig. 278. Idem; male.
Plate 28
Fig. 279. Hexaglandula mutabilis (Rud., 1819); female. After Travassos in Petrotschenko, 1958.
Fig. 280. Idem; male. Ibid.
Fig. 281. Polytnorphus biziurae Johnston et Edmonds, 1948; male.
Fig. 282. Polymorphus minutus (Zeder, 1800) ［= P. boschadis (Schrank, 1788)]; egg. After Lühe, 1911.
Fig. 283. Idem; male. Ibid.
Fig. 284. Idem; larva in Gammarus. After Graeff, 1864.
Fig. 285. Polymorph us strumosoides Lundström, 1942; male.
Fig. 286. Idem; egg.
Fig. 287. Idem; proboscis hooks.
Fig. 288. Arhythmorhynchus duocinctum Chandler, 1935; proboscis hooks.
Fig. 289. Idem; juvenile female.
Fig. 290. Arhythmorhynchus hispidum Van Cleave, 1925; male. After Fukui, 1929.
Fig. 291. Arhythmorhynchus breve Van Cleave, 1916; male.
Plate 29.
Fig. 292. Arhythmorhynchus comptum Van Cleave et Rausch, 1950; anterior half of male.
Fig. 293. Idem; posterior half of male.
Fig. 294. Idem; posterior extremity of female.
Fig. 295. Idem; anterior extremity of female with extended neck.
Fig. 296. Idem; anterior extremity with retracted neck.
Fig. 297. Idem; eggs.
Fig. 298. Arhythmorhynchus tringi Gubanov, 1954; posterior extremity of male. In Petrotschenko, 1958.
Fig. 299. Idem; proboscis hooks.
Fig. 300. Idem; anterior extremity.
Fig. 301. Arhythmorhynchtts Pumilirostris Van Cleave, 1916; anterior extremity.
Fig. 302. Idem; male.
Plate 30.
Fig. 303. Arhylhmorhynchus longicolle (Villot, 1875); female.
Fig. 304. Idem; male. Ibid.
Fig. 305. Idem; proboscis. Ibid.
Fig. 306. Skrjabinorhynchus capellae (Yamaguti, 1935); proboscis hooks.
Fig. 307. Idem; egg.
Fig. 308. Idem; male.
Fig. 309. Arhytlnnorhynchus frassoni (Molin, 1858); female.
Fig. 310. Idem; egg.
Fig. 311. Idem; proboscis. After Lühe, 1911.
Fig. 312. Arhythmorhynchus (?) distinctum Baer, 1956; anterior extremity.