558 SIR CHARLES ELIOT. 



Staurodoris, from which it differs chiefly in its denticulate teeth, penial armature and bi- 

 pinnate gills. But as seen from the present specimens it is not always easy to say whether 

 gills are simple or bipinnate. 



Collingwood (On some New Species of Nudibranchiate Mollusca from the Eastei'n Seas) 

 gives notes on a Dons pecten from Formosa. His description is not sufficiently full to 

 decide to what genus the animal should be referred but, as it has a crescent-shaped row 

 of simply pinnate branchiae and the other characters are not inconsistent with those of the 

 present specimens, I have indicated its possible identity in the proposed specific name. No 

 species of Staurodoris is recorded with certainty from the Indo-Pacific, but Abraham's Doris 

 pustulata seems closely related, though it has bipinnate branchiae. 



Gen. Trippa Bergh'. 



This genus, which seems identical with PJilegmodoris Bergh", comprises a few tropical 

 crj'ptobranchiate Dorids with a soft tuberculous body and no jaws. The characters are as 

 follows. Body flattish, soft, sometimes gelatinous: the dorsal surface covered with tubercles, 

 which are generally compound and support smaller projections. Tentacles small. Foot 

 broadish with a shallow groove in front, the upper part united to the head. The branchial 

 rosette far back at the end of the body composed of five or six tripinnate plumes. No 

 labial armature : radula composed of uniform simply hamate teeth : a number of glandular 

 bodies (? glandulae ptyalinae) are inserted in a circle round the posterior extremity of the 

 oral tube. The reproductive system is unarmed. In the Opisthobranchier d. Sammlung Plate 

 (p. 527) Bergh apparently drops the character of the foot being connected with the head. 



21. T. ornata B. 



Recorded hitherto from the Philippines and the Malay Archipelago. The present col- 

 lection contains two specimens from Minikoi marked " mottled yellowish-brown and white," 

 which agrees fairly well with Brock's coloured sketch of the animal. The preserved specimens 

 are of a purplish grey ; the dorsal tubercles somewhat darker, though some on the other 

 hand are quite white. The foot somewhat lighter. They are both about 3'5 cm. long and 

 2 cm. broad. The back is flattish and covered with numerous small tubercles, which when 

 closely examined are seen to be covered with little lumps. The mantle fairly wide at the 

 sides and over the head, with an irregularly marked dark border. The rhinophores com- 

 pletely retracted, but as far as can be judged bent backwards in the living animal. The 

 branchial orifice set far back, shallow, the branchiae being exposed in both specimens. They 

 are five in number and tripinnate, the secondary pinnae being long and the tertiary short. 

 The anal papilla is central, large and long. The radula is small and white and consists 

 of twenty rows (only one specimen examined), each of which contained from 32 to 37 teeth 

 on each side of the rhachis. The other characters are as for the genus. Except for some 

 small differences in the radula the specimens correspond very well with Bergh's description. 



' S. R. Heft XII. 1877, Heft xvii. 1890, Opisthobranchier - S. li. loc. cit. Heft xiii. Bull, of Mus. of Comp. Zool. 



der Samml., Plate, p. 527. Harvard, 1891. 



