3G2 SIR C. ELIOT OX NUDIBRANCH3 [Dec. 1, 



was proba!)ly of a different colour in life. It is noticeable that 

 the tubercles in the middle are all large and not mixed with small 

 ones. The mantle-brim is moderately ample, thick, and stiff, and 

 bears numerous irregular tubercles on the lower side which are 

 probably glandular in character. The rhinophore openings are 

 indistinctly bilabiate, not much raised, and bear small tubercles 

 on the sides and edges. The rhinophores are large, ample, and 

 deeply perfoliate. The branchial pocket is also not much raised, 

 indistinctly bilabiate, and at the same time with five irregular 

 and not very distinct crenulations. There are tubercles on the 

 sides but none on the edges. The branchiae are eight, tripinnate, 

 but not ample : the two hindermost are smaller than the others. 

 The foot is large and broad, with a shallow groove anteriorly and 

 a split upper lip. The tentacles, which are set at right angles to 

 the head, are unusually large and long (5 millimetres). The 

 labial cuticle is black, and corrugated but unarmed. The radula 

 consists of 33 rows containing about 60 simple white hamate 

 teeth ; the innermost are smaller, but the outermost are much 

 the same size as the rest. No prostate or genital armature 

 was discernible. There was a large purple double blood-gland, 

 deeply cleft in both parts so that it seemed to have four divisions. 



2. Archidoris minor, sp. n. 



One specimen from Wasin. There are no notes on the living 

 animal. 



The alcoholic specimen is 2"9 centimetres long, 1"8 broad, and 

 9 millimetres high. The colour is rather bright yellow, with 

 traces of a darker tint near the mantle-edge. The back is 

 covered with flat warts, largest towards the centre, and decreasing 

 towards the mantle-edge, but smaller ones are mingled with the 

 larger; they show indications of a lighter colour at the top. The 

 underside is of a uniform yellow. Round the rhinophore pockets 

 are two or three tubercles, which look as if they had been high in 

 life. The rhinophores are high, straight, and narrow, strongly 

 recalling Bergh's figure of those of Stcmrodoris januarii (S. R. 

 Supp. i. plate C, fig. 14). The branchial pocket is slightly raised, 

 bilabiate, and indistinctly crenulate. Though there ai'e tubercles 

 near the edge, these in no sense close over it or act as valves. 

 The branchiae are eight, tripinnate, but high, thin, and scanty. 

 The central papilla, also, is very high and thin. The foot is fairly 

 broad, and grooved in front, with the upper lamina notched. 

 The tentacles are small and conical. There is no labial armature. 

 The radula consists of 30 rows, each containing about 50 long 

 hamate teeth on either side of the rhachis ; the innermost are 

 crowded and smaller, the outermost not much smaller. At the 

 side of the base is a groove, terminating in a slight projection at 

 the bottom of the hook. 



This specimen has many points of resemblance with Archidoris 

 africana, but I am inclined to think that it is specifically distinct, 

 for the following reasons : — (1) The prevailing colour is yellow, 

 [101 



