1006 SIR 0. ELIOT ox THE NUDIBRANCHS [DeC. 11, 



rliachis, of which the last 5 are clegraded but not denticulate, 

 though jDerhaps jagged here and there. The teeth are markedly 

 smaller near the rhachis and increase outwards, not becoming 

 smaller again until quite the end of the row. In the front part, 

 as preserved, the rows bend downwards and are crowded in the 

 middle. Behind, the two sides are pulled apart, so that there 

 seems to be a broad rhachis, on which are teeth that may possibly 

 represent rudimentary median plates, though they may also be 

 merely broken teeth out of place. 



This dentition supports the idea that D. rusticata belongs to 

 the same group as Staurodoris verrucosa. The genitalia are 

 unknown. 



Doris villosa A. & H. 1. c. p. 119. 



=-Tliordisa villosa (A. & H.). 

 = Th. tnacidigera Bergh. 



One radula, consisting of one large piece and two fragments. 

 The formula appears to be about 60 x 70.0.70. The teeth increase 

 in size from the rhachis outwards. The innermost are low, with 

 long bases. Those near the end of the row are large, strong, and 

 distinctly hooked. The 3 or 4 outermost are different : thin, not 

 much hooked, and with the tij) divided into hair-like denticles. 

 In some rows this formation is obscured by the medium in which 

 the teeth are mounted, but it is quite clear in many cases. 



Tliis radula seems to place beyond doubt the identitj^ of 

 Th. villosa and Th, 'maculigera, since the type-specimen of the 

 former possesses marginal teeth bearing hair-like denticles. 



Doris spongiosa Kelaart. 



Should probably be called Trippa spongiosa (Kelaart) = 

 T. areolata (A. & H.) and Trippa {Phlegmodoris) mephitica 

 Bgh. 



One radula, broken and torn into two parts for most of its 

 length. There are only 1 5-1 6 rows, each containing about 35 teeth, 

 on either side of the rhachis. The 4-5 innermost are shorter and 

 smaller than the rest, which are hamate, white, and erect. The 

 last 1-2 decrease in size, but appear to be still hamate and not 

 denticulate. 



T. areolata (23 x 40.0.40) and T. mephitica (30 x 55.0.55) also 

 have short radula? of a similar character, and the identity of the 

 three species is very probable. 



Doris tristis A. & H. 1. c. pp. 121-2. 

 1.=Trip2Ja tristis A. & H. 



The single radula is accompanied by the note " no collar appa- 

 rently," and is divided down the rhachis into two detached halves. 

 There are only 17 rows, each containing about 28 or 30 teeth, on 

 either side of the rhachis, but it is difficult to state the number of 

 teeth exactly, as the innermost are scattered over the space between 



