142 OKHAMANDAL MARINE ZOOLOGY REPORT 



the girdle comes a constriction, and the posterior part of the stomach is soft and 

 laminated. From it issues the large intestine, which is laminated internally and 

 provided with a ridge. It runs straight to the anus, which is situated just in 

 front of the second of the cerata on the right side. At the point where the intestine 

 issues from the stomach is a diverticulum with puckered walls. The liver is a 

 mass of small tubes, white or yellowish, which completely surround the herm- 

 aphrodite gland. It consists of three portions : a very small one on the right 

 of the' stomach and a rather larger one on the left uniting with the posterior 

 portion, which is much the largest of the three. The livers send up prolongations 

 which enter the dorsal integuments and reach the base of the cerata, but I could 

 not discover either by external examination or by sections any trace of hepatic 

 diverticula within the cerata. 



The hermaphrodite gland, which is entirely surrounded by the liver tubules, 

 consists of a great number of globules. Its duct is long and leads into a long ampulla 

 bent upon itself several times. After the bifurcation, the female branch becomes 

 broad, flat and puckered, forming a complete loop (the "Schlinge" in Bergh's 

 description of Melibe rangii). It then contracts again. The spermatotheca is 

 elongated and has a short broad duct. The male branch passes almost immediately into 

 the large spherical prostate, which consists of two portions, the smaller yellow or 

 greenish and the larger pink. From this pink portion issues the thin but muscular 

 vas deferens, which forms two coils and then passes into the penis. This organ is 

 long, dagger- shaped, and either straight or bent. In most of the specimens examined 

 the genitalia were small, but in one the mucus and albumen glands were swollen to 

 an enormous size, and distended the interior part of the body. The pink prostate is 

 a conspicuous object even externally, as it can be seen through the integuments. In 

 the central nervous system the ganglia are strongly granulated and not distinctly 

 divided from one another. 



These specimens seem referable to Melibe rangii, Bergh, but this species (1888) 

 is probably the same as the earlier M. Jimbriata of Alder and Hancock, 1864. There 

 are some external differences, and A. and H. state that their species has no jaws, 

 but I have shown (in Jour, of Conchol., vol. 12, No. 3, July, 1907, pp. 90-1) that 

 this statement is probably an error. But as there can be little doubt that these 

 specimens are M. rangii, I use that name until the identity with M. Jimbriata can 

 be established. 



The only feature which militates against the identification of these specimens with 

 M. rangii is that they have no trace of hepatic diverticula within the cerata, although 

 the liver extends to the base of the cerata. It is probable that different individuals 

 show diversity in this respect, as in Dendronotus and Bornella. 



From an examination of the living animals, Mr. Horuell was led to think that 

 symbiotic algae might be present in the small ramified processes borne by the cerate, 



