364 SIR C. ELIOT ON NUDIBRANCHS [DeC. 1, 



4. Staurodoeis calva, sp. n. 



One specimen from Kokotoni Harbour, Zanzibar ; dredged in 

 about 5 fathoms. 



The living animal was of a dirty grey colour, but with very 

 little pigment at all ; the gills and rhinophores sandy, the under 

 surface and the smooth band near the rhinophores pinkish. The 

 dorsal surface was covered with tubercles, large and small, of 

 various sizes, but decreasing towards the ma,ntle-edge, where they 

 were minute ; small tubercles were set on the edge of the slightly 

 raised gill-pocket, which wa,s partly closed by them. The anterior 

 portion was pi-olonged into a nose-like projection. Across it 

 extended a smooth pinkish strip, which bore no tubercles. Im- 

 mediately behind this strip were set the rhinophores. It is 

 possible that this singular arrangement may have been an un- 

 natural distortion. Some species of Platydoris undoubtedly 

 remain fixed in crevices until their shape is altered. Still, the 

 present specimen showed no trace of tubei-cles having been efiaced 

 on the bare patch, and there is no reason to svispect the chai'acter 

 except that it is, as I believe, unique among the Dorididfe. 



The alcoholic specimen, 2 centimetres long and 1*3 broad, is 

 much like the living animal. The broad foot has* the anterior 

 margin entire and not grooved. The dorsal tubercles are sur- 

 rounded by numerous very distinct spicules arranged in a stellate 

 form. The tentacles are small and furrowed. There is no 

 labial armature, and the radula consists of 48 rows of simple 

 hamate teeth containing about 70 teeth on each side of the 

 rhachis. The stomach is large and free. The branchiae are five 

 in number and bipinnate. The branchial pocket is almost closed 

 by the valve-like tubercles on the edge of it. No reproductive 

 armature was discovered. 



This form seems referable to Staurodoris. Though the branchiae 

 of this genus are typically only pinnate, they appear to be 

 bipinnate in both S. jjseudoverrucosa (v. Iher.) and /S\ j^^iis^ttfosa 

 (Abr.). 



5. DiSCODORIS BOHOLIENSIS B. 



[S. R. xii. p. 519, xvii. p. 897.] 



Two specimens from Zanzibar. 



The body of the living animal was flat, with a very ample 

 flexible mantle. A high, narrow dorsal keel extended from the 

 branchial pocket to between the rhinoj^hores. The ground-colour 

 was yellowish drab, with a black edging round the wavy mantle- 

 edge, which in places extended inwards. The whole back was 

 covered with small papillae, some brown, some white. The dorsal 

 keel wa,s blotched with brown and black. The i-hinophores and 

 branchife were black. The underside was dirty white, with black 

 and brown blotches at the side of the foot. The living animal 

 was 2| inches long and 2 broad. The large specimen displayed 

 the phenomenon of self-mutilation. The rhinophore openings 



