ELlOT--Nt7I)IBRANCHS 141 



sheaths there are six pairs of cerata : the first pair are trifid ; the second, third, and 

 fourth are bifid ; the fifth and sixth are simple. 



The specimen is of the same type as those from Karachi described by me in the 

 Journal of Conchology {I.e.). The species is probably common in these waters. 



Melibe rangii, Bergh. Probably = If. fimhriata, A. and H. 



See Bergh, Malaool. Untersuch. ix. 1888, pp. 370-6, and Alder and Hancock, Notes on a Collection 

 of Indian Nudihranchiate Mollusca, 1864, pp. 137-9. 



Seven specimens from Kiu, Okha. The largest is about 80 mm. long, but 

 as it is bent this represents a real length of at least 100 mm. The general 

 colour is a very faint transparent hyaline green, which allows the pink and white 

 viscera to be seen clearly. The muscles are also clearly visible as a network 

 of intersecting stripes. In places there are brownish spots and all the processes, 

 filaments, cirrhi of the hood, &c., tend to be olive green, especially on the upper 

 parts of the animal. 



The back bears from six to eight pairs of large cerata.^ In the best preserved 

 specimen, which is only 55 mm. long, they are 21 mm. high. In some cases, however, 

 they are quite small, even near the middle of the back. This is apparently due 

 to the full-grown cerata having fallen off and been replaced by fresh growths. 

 Most of the cerata in the present collection are detached and show a configuration 

 like that depicted by Bergh for Melibe vexillifera (Bergh, Verh. d. h.h. zool. hot. 

 Ges. in Wien, 1880-1, PI. 11. fig. 3), namely, a globular tuberculate base bearing 

 a thinner crest with jagged membranous edges. But in the specimen where the 

 cerata remain in situ they are tall and wedge-like, and this is probably the natural 

 shape, the other being due to distortion caused by the contraction of the base. 

 Besides cerata there are on the surface of the body : (l) small low tubercles, simple 

 or compound, especially numerous on the sides and on the hood ; (2) largish pointed 

 papillae ; (3) simply ramified processes, as much as 12 mm. high, especially numerous 

 on the back. The rhinophore sheaths are tall, slender, and provided with one or 

 more long digitate processes. The club of the rhinophores is small ; opaque white 

 or yellowish. The opening of the hood is circular and bears inside three or four 

 irregular rows of long (as much as 14 mm.) snaky cirrhi. The lips are not raised 

 and the mouth is merely a roundish opening surrounded by very small papillae. 



The mouth opens into a tube more or less coloured with dark pigment. In 

 its walls are embedded two small jaws, yellowish, membranous, and irregularly den- 

 ticulate. A short laminated oesophagus leads directly into the stomach, which is 

 surrounded by a very distinct girdle of about forty plates. They vary considerably 

 in colour (red, yellow, or grey) and in size, but do not alternate regularly. Behind 



^ For details respecting the appearance of these cerata when fresh, see Mr. Hornell's note and 

 figures, pp. 145-7 below. 



