U. S. NATIONAL MUSEUM 



PROCEEDINGS, VOL. 88 PLATE 18 



236^ 238(' pi 



234,235. Gasterostomum arcuatum Linton from Sarda sarda: 234, \entral vie^. 2^:, o^a. 



236^239. Gasterostomum capitatum, new species, from Jux^s rocket: lib. Ventral Mev.,.,0/, 

 anterior end of another specimen; 238, posterior end of another specimen 

 (uterus diagrammatic); 239, ova. , „ ntn \^ t.oi ^-I^w 



240-242. Prosorhynchus crucibulum (Rudolphi) from Conger conger: 240, \entral Aiew, 

 241, anterior end of another specimen; 242, ova. _ _ o-, t- , i ,.:„„.. 



243,244. Prosorhynchus ovatus (Linton) from Lobotes sunnamensis: 243, Ventral ^lt^^ , 



245-249. Pr^orhynchus gracilescens (Rudolphi): 245, \-entral view; 246, ^Pe,<=^"^^f^ip^7^Ich 

 no ova had developed; 247, strongly contracted specimen; 248, anterior end 

 249 ova {US irom Menticirrhus saxatilis, 2A6-2^9 iromStrongylura martna.) 



250, 25L Nannoenterum baculum (Linton) from Sphyraena boreahs: 2jO, Ventral view; -M, 

 anterior end. 



