XIV LIST OF ILLUSTRATIONS. 



Facing 



264. rrolospirura lahiodcntata. Ilead, Adewed from Iho front 203 



265. Protaspirura muris. Head, \T.e\ved from the front 204 



266. Proiispirura muru. Bursa 205 



267. Protispirura muris. Encapsuled larva from meal v.orm 206 



268. Proiospirura muris. {Spiropiera brauni) Bm'sa 206 



269. Proiospirura ascaroidea. Lips, viewed from the front 207 



270. Proiospirura ascaroidea. Anterior extremity, lateral view 207 



271. Proiospirura ascaroidea. Male 208 



272. Proiospirura ascaroidea. Posterior extremity of male 209 



273. Proiospirura ascaroidea. Female, v., vulva 210 



274. Proiospirura ascaroidea. Posterior extremity of female 211 



275-276. Proiospirura ascaroidea. 275. Terminal genitalia of female. 276. 



Egg - 212 



277. Phjsalopiera muris-hrazilensis. Lip, lateral view 214 



278. Physaloptera muris-braziliensis. Posterior extremity of male, ventral 



view 214 



279. Physalopiera abhreviaia. Anterior extremity 215 



280. Physalopiera abbreviaia. Posterior extremity of male, ventral view 215 



281. Physalopiera circularis. Posterior extremity of male, ventral view 216 



282. Physaloptera ruwenzorii. Head, lateral view 216 



283. Physalopiera ruwenzorii. a, posterior extremity of male; 6, spicules 217 



284. Physalopiera ruwenzorii. Vulva 217 



285. Physaloptera sciuri. Anterior extremity, lateral view 218 



286. Physaloptera sciuri. Bursa 218 



287. Phxjsocephalus mediospiralis . Head, viewed from the front 219 



288-290. Spiropiera species. 238. a, worm in cyst; b, removed from cyst. 



289. Anterior extremity; 290. Posterior extremity 224 



