1906.] OF SOUTHEJRN INDIA AND CEYLON. 661 



Boridopsis" (Trans. Linn. See. 1865, xxv. 2, pp. 189-207), is still 

 w'ell worth reading. 



The family is divided into two genera, Doriopsilla and Bori- 

 dopsis. Boriopsilla, which is discussed below, contains at present 

 about six species. 



{Boriopsilla granulosa (Pease) is doubtful.) 



1. Boriopsilla areolata Bergh. 



2. B. pelseneeri Oliviei-a. 



3. B. Tniniata (A. & H.). 



4. B. pallida Bergh. 



5. B. loevis Bergh. 



6. B. reticidata Oockerell & Ehot. 



Species 3, 4, and 5 are perhaps very closely related. 



In a paper by Prof. Cockerell and myself (Journ. of Malac. 

 1905, vol. xii. pt. 3) Bergh's list of the species of Boridopsis 

 given in his ' System ' was brought up to date, and 64 species 

 were indicated. Of these, B. miniata and B. reticulata are now 

 shown to be Boriopsillce, but the following additions from Bergh's 

 Opisthobranchs of the ' Siboga ' may be made : — 



63. B. erubescens Bergh. 



64. B. amo&na Bergh. 



65. B.flaccida Bergh. 



66. B. weberi Bergh. 



These sixty-six species probably include many synonyms, and 

 many of them, particularly those described by D'Orbigny, Crosse, 

 and Pease, are only doubtfully referable to the genus. Neither 

 the buccal parts nor the genitalia supply specific characters 

 in the majority of cases, and the external appeai^ance is even 

 more variable than in Chromodoris. One of the best known 

 species, B. nigra, is protean in its transformations. It not only 

 ranges from black to white, with or without coloured borders and 

 spots, but is sometimes smooth and sometimes tuberculate. As 

 a rule, however, the smooth and tuberculate forms appear to be 

 distinct. 



DoBiDOPSis TUBERCULOSA (Quoy & Gaim.) var. 



{Boris carbunculosa Kelaart, 1. c. I. p. 301 ; Bergh in Semper's 

 Reisen, xvi. 2, p. 845.) 

 Alder and Hancock {I. e. p. 128) pointed out that Kelaart's 

 B. carbunculosa is probably the same as Quoy and Gaimard's 

 B. tuberculosa, though it difiers in not having white spots on the 

 under side. These white spots are very conspicuous in the living 

 animal and remain in alcoholic specimens. Bergh, however (l. c), 

 has described a variety from Mauritius in which the white spots 

 are absent, and which agrees with B. carbunculosa in several 

 details. It is very soft, and the under side of the mantle is 

 " mit feinen Langsf urchen ," corresponding to Kelaart's state- 

 ment that it is veined. 



