568 SIR CHARLES ELIOT. 



The Dotonidae are mostly minute animals and the forms described come chiefly from the 

 northern Atlantic and Mediterranean. At least one species however comes from East Africa, 

 and the family is probably cosmopolitan. 



30. Boto indica Bgh. ? 



One small specimen from Minikoi in the Laccadives. Length 7 mm., breadth 3 mm., 

 colour uniform dirty yellow. There were apparently five pairs of cerata on the back, but 

 all have fallen off. One, however, which doubtless belonged to this specimen, was found 

 in the same bottle. It was fusiform and bore three rings of tubercles. The frontal veil 

 was ample and expanded at the side into lappets. The rhinophore sheaths with an uneven 

 indented margin : on the outside of each is an undulated membranous process. The foot 

 rounded in front, the tail short. The jaws weak. The radula uniseriate. The teeth of the 

 form usual in the genus. The central cusp not very prominent, with 3 — 5 iiTegular lateral 

 denticulations. 



There is, strictly speaking, no proof that this specimen belongs to the genus Doto, 

 since the cerata are not preserved, but I think it probable that it is Bergh's Doto indica 

 (S. R. XVI. p. 795) recorded from Mauritius. The identification is supported by the shape 

 of the rhinophore sheaths and the membranous process. 



Fam. Aeolididae. 



The Aeolids are limaciform animals with tentacles^ rhinophores either simple or perfoliate 

 but always non-retractile and without sheaths, and simple dorsal cerata containing ramifica- 

 tions of the liver. Mandibles are always present, and the radula has never more than one 

 or three teeth in a row. 



The Aeolids are the largest family of the Cladohepatica and comprise about forty genera. 

 It is therefore somewhat remarkable that they should be represented in the present col- 

 lection by only one small specimen. It has often been noticed that they are far more 

 abundant in Northern than in tropical waters — or at least in collections from the North 

 than in those from the tropics — but still the proportion here is unusually small. My own 

 experience after collecting continuously for a year in East Africa and Zanzibar is that the 

 genera of Aeolids are numerous but the individuals few and hard to get. Dorids can be 

 found under almost every stone on a coral reef, but Aeolids are obtained either in fairly 

 deep water or among seaweed where they are not easily seen. 



Gen. Phidiana Gray-. 



The characters of the genus are as follows. Body elongate and slender. Rhinophores 

 perfoliate. Foot rounded or truncated in front. The masticatory edge bears a single row 

 of denticles. Radula uniseriate. Verge armed with a hook. 



Phidiana is one of the many genera of Aeolididae, which have an elongate body and 

 perfoliate rhinophores. It is separated from most of them by the fact that the anterior 



' The strange Pseudovermis Kovalcwski {Mem. de I'Ac. de - A. and H., Notes on a Coll. of Nudibr. Moll, made in 



S. Pet. Ser. viii. vol. xii. no. 4, 1901) is described as having India. Beigli, Beitr. z. Kenntniss der AeoUdiaden, i. and vi. 

 neither tentacles, rhinophores, nor cerata. Id. Opisthobranchier der Sammlung, Plate. 



