ftt.lOr : NUDIBKANCHS FROM THE IN 1)0-1'ACI FIC. 8$ 



arrangement, according to which they all come under different sub- 

 families. Possibly Aldisa belongs to the same group. It is warty, 

 not villous like Thordisa and Diaiilnla^ with which Bergh associates 

 it, and it has denticulate teeth of an unusual form ; also an armature 

 on the genitalia. 



It is possible that this animal is the same as that described liy me 

 {^Proc. Zool. Soc. Loud., 1903, p. 363) as Staiirodoris dej>ressa, the 

 small labial armature having been overlooked or being really undeve- 

 loped. But, besides anatomical discrepancies, the external appearance 

 of. the specimens does not suggest identity. It is probable, however, 

 that the species depfessa, doubtfully referred by me to Staiirodoris, is 

 really more nearly related to Arhtc/uca. 



B. NUDIBRANCHS FROM SINGAPORE. 



When I visited the museum at Singapore last August (1906) the 

 authorities most kindly gave me some specimens of Nudibranchs 

 recently captured in or near the harbour. They are well preserved, 

 and appear to have kept their original colour to a considerable extent. 

 The species and the localities from which they have previously been 

 recorded are as follows : — 



I. — Kentrodoris maculosa (Cuv.), recorded previously from 

 the Phili[)pines, Ternate, Java, Ceylon, east coast of India, and (?) 

 Vanikoro.^ 



2. — Chromodoris lineolata (Van Hasselt), Java, Philippines, 

 Borneo, Torres Strait. 



3. — Casella atromarginata (Cuv.), Philippines, Persian Gulf, 

 N. Australia, Polynesia, Zanzibar, Siam. 



4. — Phyllidia elegaas Bergh, Philippines, Amboina. 



5.— Placobranchus ocellatus Van Hasselt, Java, Philippines, 

 Siam, Zanzibar, Polynesia. 



6. — Elysia faustula Bergh, Philippines, E. Africa. 



This distribution is what might be expected. All the Singapore 

 species are recorded from the Malay Archipelago and nearly all from 

 other parts of the Indo-Pacific area. It is likely that they will all 

 prove to be distributed over the whole of that area. 



Many of the Singapore specimens (particularly those oi Kentrodoris 

 inaatlosci, Casella atrotnargiiuita , and Fhuvl'ranc/iiis ocel/atus) seem to 

 have a lighter and more uniform coloration than that wliich is usually 

 ascribed to the species. 



Kentrodoris maculosa (Cuv.). 



Bergh, " Opisthobranchialen,"' in Iviikenthal, JVissenschaftliche 



I I have some doubls as to whethei- the animal described by (Juoy and Gaimard from this 

 loj.Tbly is really the same species. 



