[huntsman] the ASCI DI an FAMILY CAESIRIDAE 225 



(Pizon), P. patagonica (Michaelsen), P. rugosa (Pizon) and P. villosa 

 (Pizon). Among these there are doubtless several synonyms. 



This genus occupies a somewhat isolated position. In the peculiar 

 position of the testicular lobes and vasa deferentia it differs from all 

 other genera of the family except Ectorchis. The great number and 

 irregular disposition of the infundibula recall the condition in Bostricho- 

 hranchus and Rhizomolgula. Elsewhere in the Cystingiinae the 

 development of small infundibula accessory to the principal ones is 

 not unknown, but is not carried so far as in these three genera. 



ANURELLA Lacaze-Duthiers (sens, nov.) 

 Syn. Molgula et Caesira auct. (partim.) 



Pharynx with seven folds on each side. Infundibula extending 

 into folds, each having many stigmata spirally arranged. Dorsal 

 lamina with smooth margin. Dorsal tubercle with aperture horse- 

 shoe-shaped, the horns incoiled, and the opening between horns directed 

 posteriorly or to right. 



A gonad on each side, the left above and parallel to the intestinal 

 loop. Testicular lobes bordering and more or less enclosing ovary. 

 A single vas deferens accompanying ovary and oviduct. 



Type species — A. bleizi Lac.-Duth. 



The only other species that we can assign to this genus is A. 

 maxima (Sluiter). 



EURITTERIA gen. nov. 



Syn. Molgula et Caesira auct. (partim) 



(Named after Prof. W. E. Ritter, who has contributed so much to our 



knowledge of Ascidians) 



Pharynx with 6 folds on each side. Infundibula extending into 

 folds, each having many stigmata spirally arranged. Dorsal lamina 

 with margin smooth or toothed. Dorsal tubercle with slit-like 

 aperture more or less bent into the shape of a horse-shoe, the horns 

 sometimes spirally coiled. Opening between horns directed vari- 

 ously. 



Intestinal loop often strongly curved into a secondary loop. 

 A gonad on each side, the left above primary, but in or else closely 

 applied along secondary intestinal loop. Testicular lobes bordering 

 and more or less enclosing ovary. A single vas deferens, accom- 

 panying ovary and usually oviduct also. 



