ELIOT— NUDIBRANCHS 143 



and in other brownish portions of the integuments. The integuments, as preserved, 

 do not in any way discountenance this supposition, but in their present condition they 

 do not afford good material for histological examination. Mr. Hornell's notes and 

 drawings are therefore appended without addition. 



In the Quarterly Journal of Microscopical Science (March, 1908, pp. 287-8), Mr. 

 Evans and myself indicated the possible presence of symbiotic algse in the dorsal 

 regions of Doridoeides Gardineri. 



Antiopella indica, sp. n 



ov. 



For the synonymy Antiopella = Janus = Antiopa, see Eliot, Notes on some British Nudibranchs, 

 Jaurn. Mar. Biol. Assoc, 1906, p. 373. 



Two specimens marked Kiu, Okha. They are solidly built with flat backs. The 

 measurements of the larger are : length 11 mm.; breadth across the rhinophores, which 

 is the widest part, 6 "5 mm. ; height 5-5 mm. 



The integuments are transparent, but the general coloration is somewhat 

 mottled because the pinkish, whitish, and greenish intestines show through the back, 

 foot, and sides. Also on the back, lips, rhinophores and crest, anal papilla and 

 sides are scattered quite irregularly small reddish-brown spots. The cerata are 

 greenish -grey and the parts of the back near them seem to be marked with faint 

 light stripes running towards the margin. 



The cerata are arranged along the margin of the back, at most two or three 

 deep. They are small (largest l"5mm. high), thin, and not like those of most 

 Janidse. They extend in front of the rhinophores. These latter, as well as the 

 crest between them, are well developed and thickly perfoliate. The anal papilla is 

 very large : it is set far back in the medio-dorsal line. The genital orifices are 

 about 3 '5 mm. from the head and not conspicuous. The oral tentacles are 

 indistinct. The foot is moderately broad. 



The buccal mass is large. The jaws are red and bear a single series of very 

 large denticles. The tissues around them are pinkish- white. The formula of the 

 radula is 21x31. 1. 31 as a maximum, but the front rows are only 12. 1. 12, the 

 number of teeth increasing rapidly in the hinder rows. The teeth are thin, trans- 

 parent, and colourless, of the hamate type usual in the genus and not denticulate. 

 They are somewhat crowded, but the rhachis is wide and the median teeth plain. 

 The stomach and the liver tubes which communicate wjth it are very thin and not 

 at all muscular. A hepatic duct enters the stomach on either side and a third 

 behind. These ducts give off branches which enter the integuments and form a 

 spongy layer under the cerata. 



The anterior genital mass is pinkish and of small size. The spermatotheca, 

 however, is large, elongated, and in the specimen examined empty. The hermaphro- 



