[huntsman] the ASCI DI an FAMILY CAESIRIDAE 223 



RHIZOMOLGULA Ritter 



Pharynx with six folds on each side. Large infundibula in folds 

 and small accessory ones between folds. Stigmata varying in size, 

 and arranged spirally in the infundibula. Dorsal tubercle with open- 

 ing between horns directed anteriorly and to left. Dorsal lamina 

 with smooth margin. 



Single gonad, situated on the left side, in the intestinal loop. 

 Testicular lobes, bordering and more or less enclosing ovary. Several 

 vasa deferentia, not accompanying oviduct. 



Type and single species — *R. globularis (Pallas) (see Huntsman, 

 1913, p. 137). 



EUGYRA Aid. and Hanc. 



Pharynx with from 6 to 9 longitudinal bars on each side in place 

 of folds. Infundibula consisting of one or two spirally coiled stigmata, 

 little or not at all divided. Dorsal lamina with smooth edge. Dorsal 

 tubercle a simple opening, or horse-shoe shaped with opening between 

 horns directed to right or left. 



Single gonad, situated on the left side and in or across the inner 

 side of the intestinal loop. Testicular lobes bordering and more or 

 less enclosing ovary. One to several vasa deferentia, not accompany- 

 ing oviduct. 



Type species — E. arenosa Aid. and Hanc. 



Sub-gen. Eugyra 



Type^ — E. arenosa Aid. and Hanc. 



Infundibula large and in rows corresponding to the longitudinal 

 bars. 



In addition to the type, there are E. adriatica Drasche, E. pedun- 

 culata Traust., E. translucida Kiaer, and probably E. bilahiata Sluiter. 

 We have examined a species from the California coast. E. ker- 

 guelenensis Herdman probably does not belong in this genus. While 

 Herdman (1882, p. 81) gives the generic characters to include the 

 presence of only a single gonad placed on the left side, he has figured 

 for two specimens of this species (PI. VI, Figs. 4 and 5) what appears 

 to be a gonad on the right side. 



Sub-gen. Bostrichobranchus Traustedt 

 Syn. Herdmania Metcalfe 



Type and single species — E. pilularis (Verrill). 



Infundibula in adult small, numerous, and irregularly arranged. 



