1909] Eitter: Ealocynthia johnsoni n. sp. V6 



still remains in doubl as to jusl where the stomach ends and 

 the intestine begins. In figure \ the distinctness has been ex 

 aggerated somewhal by the artist. It seems, however, thai the 

 "liver" empties into the stomach proper. Two of the three typ- 

 ical stomach Holds are shown in the figure. It will be noted 

 that the Larger of these extends on beyond the mouth of the 

 liver duct. 



In no ascidian have I noticed so greal a development of the 

 alveolar lobes of the "lacteal" system as in tins species. Their 

 general distribution on the intestine is shown in Plate s . fig. 3 

 I h . s.), and a few of them somewhat more detailed, together 

 with the duels on the surface of the intestinal wall ( <l . Ic. S.), 

 in Plate !». fig. 6. The anatomical conditions here presented 



suggesl that tins s| ies would he favorable for a study of the 



physiology of both the "liver" and the "lacteal" system. 



1,1 producth i Systt m. 



'I'he reproductive organs are nearly symmetrically disposed 

 on the two sidi s id' the body, as figures 2 and 3 show. 'I'he com- 

 bination of the female and male elements in the same gonadial 

 pouches, a condition not uncommon in the genus Halocynthia, 

 is also shown by these figures. In life the testis portions of the 

 lobes {gon. $), always distal from the axial duct, are straw color, 

 while the ovarian portions are a pinkish gray. The female parts 

 are much the larger in amount, constituting the whole of the 

 lobe in many cases, and rarely or never fail to constitute the 

 major pari of any particular lobe, though whether this propor- 

 tion holds for the whole life of the animal I do not know. The 

 .sperm duct and oviduct are so closely united (fig. 1', gon. r/35 i 

 that I have not been able to distinguish them in in lulu prep- 

 arations except by the terminal papillae t PL 9. fig. 5) and 

 the presence of sperm in the vas deferens. That the two ducts 

 are distinct throughout lias been shown particularly by Lacaze- 

 Duthiers et Delage ('93), for //. morns of the European seas. 

 Whether or not self-fertilization is ruled out in //. johnsoni is 

 not. known. 



Decidedly worth noticing is the constancy in number of the 

 gonadial lobes. By reference to the variation tables it will be 



