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



4. iStaurodoris calva, sp. n. 



One specimen from Kokotoni Hai'bour, Zanzibar ; dredged in 

 about 5 fathoms. 



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

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

 sui-face and the smooth band near the rhinophores pinkish. The 

 dorsal sui'face was covered with tubei-cles, lai-ge and small, of 

 vai'ious sizes, but decreasing towards the mantle-edge, where they 

 wei-e minute ; small tubercles were set on the edge of the slightly 

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

 portion was prolonged into a nose-like pi'ojection. Across it 

 extended a smooth pinkish strip, Avhich boi'e no tubercles. Im- 

 mediately behind this sti'ijj were set the rhinophoi'es. It is 

 jiossible 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 tubercles having been efiaced 

 on the bare patch, and there is no reason to suspect the character 

 except that it is, as I believe, unique among the Doi-idida\ 



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- 

 I'ounded by numerous very distinct spiciiles arranged in a stellate 

 form. The tentacles are small and furrowed. Thei-e is no 

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

 hamate teeth containing about 70 teeth on each side of the 

 I'hachis. The stomach i& lai-ge and free. The branchite are five 

 in number and bi})innate. 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 branchia9 

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

 bipinnate in both *S'. j^seudoverrucosa (v. Iher.) and S. pusiulosa 

 (Abr.). 



5. DiSCODORIS BOnOLIEXSIS B. 



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



Two specimens from Zanzibar. 



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

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

 branchial pocket to between the rhinophores. 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 papilla?, some brown, some white. The dorsal 

 keel was blotched with brown and black. The rhinophores and 

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

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

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

 the phenomenon of self-nn;tilation. The rhinophore openings 



