554 SIR CHARLES ELIOT. 



the tubercles, both in the yellowish and in the blackish parts, are of a lighter colour than 

 the bases, which gives a curious effect well rendered in Alder and Hancock's plate I. c. The 

 foot and under edge of the mantle are spotted with purplish-brown. The rhinophore sheaths 

 are raised and tuberculate. The branchial opening is large and crenulate and contains six 

 tripinnate gills. The labial armature consists of two narrow yellowish plates, which form 

 an almost continuous ring. The radula is as usual in the genus and family broad, the teeth 

 being smaller but not denticulate at the outside. 



I think this specimen may be safely referred to A. and H.'s species concinna. 



14. D. pardalis, var. (A. and H.). 



One specimen from N. Male Atoll, Maldives, 25 /. Length 4'4 cm., breadth 2'1 cm. 

 Dorsal surface finely tuberculate, yellowish, with traces of orange-coloured spots. Under 

 surface yellowish, without spots. Foot grooved at the anterior end but the notch in the 

 upper lamina is hardly perceptible. Branchial opening raised, so as to be almost a papilla, 

 round and not notched. Branchiae six, long and slender, tripinnate. Labial armature circular 

 and very strong, consisting of a compact mass of yellowish rods. Radula unusually nan'ow : 

 teeth simply hamate, large and coarse and not materially diminishing at the inside or 

 outside of the row. Formula 13 (or 14). 0. (14 or) 13. Reproductive system unarmed. 

 Prostates large. 



I doubtfully register this specimen as D. pardalis (A. and H. I. c.) because it has obvious 

 resemblances to that species as described and the points of certain difference do not seem 

 sufficient to constitute a new species. The coloration, the slender branchiae, and the absence 

 or inconspicuousness of the notch on the upper lamina of the foot are all points of re- 

 semblance. But the branchial opening though raised is distinctly round and not stellate as 

 in A. and H.'s specimen, and though they give no details as to the radula it is noticeable 

 that they do not allude to its narrowness or the great size of the separate teeth. 



15. B. meta B. 



A single specimen from N. Male Atoll, Maldives, 30 /., seems referable to this species 

 with tolerable certainty. The animal is oval in shape, 2'3 cm. long by 17 cm. wide : the 

 texture is soft and the back covered with fairly large papillae. The ground colour is yellowish 

 with the remains of brown and purple blotches in the middle. From between the rhino- 

 phores to the gill opening runs a somewhat indistinct dorsal ridge. The mantle margin is 

 ample and undulated. The rhinophore sheaths are projecting, with jagged edges, which in 

 the preserved specimen have closed over the opening. The branchial opening consists of a 

 transverse slit, the upper end of which overhangs the lower. Gills, 6, tripinnate. Foot 

 deeply grooved and notched in front. Labial tentacles reddish-yellow. Labial armature bright 

 blue, formed of minute rods. The radula consists of simply hamate teeth. Both the inner- 

 most and outermost, especially the former, are smaller than the median teeth, but none 

 were rudimentary. The cerebral ganglia were rather far apart. 



The colour of the labial armature is unusual. In the two specimens examined by Bergh 

 (I.e. Heft XII.) it was olive-grey. 



