NO. 14 MANTER : DIGENETIC TREMATODES OF FISHES 377 



or subcircular, 0.187 to 0.315 in diameter; acetabulum a short distance 

 anterior to midbody, circular, 0.195 to 0.300 in diameter. Suckers sub- 

 equal, oral sucker usually slightly larger. Short prepharynx present ; phar- 

 ynx 0.142 to 0.225 in length, 0.135 to 0.270 in width, with anterior 

 border of eight lobes (fig. 57). These pharyngeal lobes are more marked 

 ventrally and internally, the dorsal lobes being broader and not so clearly 

 demarked. Esophagus short ; ceca broad ; 2 ani present. Genital pore to the 

 left immediately anterior to acetabulum. Testes usually smooth, rarely 

 slightly lobed, tandem or oblique, near hind end of body. Cirrus sac pyri- 

 form, extending from genital pore well past posterior edge of acetabu- 

 lum; 0.390 to 0.555 long by 0.127 to 0.180 greatest width; containing a 

 cirrus (extending approximately to posterior edge of acetabulum), a wide 

 pars prostatica, an ovoid internal seminal vesicle. External seminal vesicle 

 present. Ovary multilobed, median, immediately anterior to anterior tes- 

 tis ; seminal receptacle elongate, extending along left side of anterior tes- 

 tis ; uterus chiefly or wholly preovarian, wholly pretesticular ; metraterm 

 extending somewhat posterior to acetabulum. Vitellaria from near pos- 

 terior edge of acetabulum to posterior end of body, lateral, dorsal, and 

 ventral to ceca. Eggs 56 to 61 by 29 to 36 fi. Excretory pore at posterior 

 end of body; excretory vesicle extending at least to ovary. 



The name adplicatum indicates similarity to B. plicatum. 



Comparisons. B. adplicatum is very similar to B. plicatum (Linton) 

 except for the following differences: the oral sucker is larger, the phar- 

 ynx is larger and possesses a lobed anterior border, the eggs are smaller, 

 and the genital pore tends to be slightly more anterior. The lobed ante- 

 rior border of the pharynx suggests the Megaperidae Manter, 1934, 

 which also possesses anal pores. 



B. cryptostoma (Ozaki) is very similar to B. plicatum, apparently 

 differing only in the union of the body folds and absence of a prepharynx. 

 Egg sizes were not given for B. cryptostoma, which may be a synonym 

 of B. plicatum. 



All species of Bianium to date occur in puffers. 



Myzotus vitellosus, new genus, new species 

 (Plate 39, figs. 58-60) 



Host: Caulolatilus sp. probably princeps (Jenyns) 

 Location : Intestine 



Locality: Tagus Cove, Albemarle Island, Galapagos 

 Number : Many from a single host 



