lt'4 " KNDKAYOri; " SCIENTIFIC KKSCMs. 



spines on the snout form a triangular cavity in which the 

 rostral tentacle is situated. There is another similar one 

 between these and the snpraorbital series on each side. Five 

 more are arranged round the upper and posterior margins of 

 each orbit, and a strong one is placed exterior to the nostrils on 

 either side. There are seventeen series of marginal spines between 

 the snout and either pectoral fin, which are usually provided with 

 four radiating points. A second series of enlarged, single- 

 pointed spines projects upwards on the upper surface near the 

 margin. A space exterior to each eye, which is defined in 

 front and on its outer side by four strong spines, is almost 

 naked, while the interorbital space and an area surrounding the 

 gill-openings are nearly spineless. Tail covered with spines 

 similar to those of the body, and its lateral margins armed with 

 three or four-pronged spines. Most of the marginal spines of 

 the disk and tail bear clusters of simple, dermal filaments, 

 which are most developed posteriorly. A few spines on the 

 back also have similar filaments. 



The greater part of the lower surface appears smooth to the 

 naked eye, though microscopic granules can be detected between 

 the ventral fins and beneath the branchial regions. A row of 

 small spines, armed with several points, forms a submarginal 

 series round the greater part of the disk and on the sides of the 

 tail. Between this series and the marginal spines is a groove 

 which is bridged at intervals by thick fleshy tubercles meeting 

 across it ; a row of smaller tubercles in its centre line appear to 

 represent a mucous system. 



liosti'al tentacle trilobed, the lateral lobes with a fringe of 

 minute filaments. Interorbital space concave. Anterior nostril 

 opening in a short tube, and close to the posterior which is sub- 

 circular; they are placed in the anterior half of the snout. Lips 

 7iiargined above and below with thick fleshy tubercles covering 

 minute bony granules. Jaws with bands of minute, villiform 

 teeth, vomer and palatines toothless : pharaiigeal and hyoid 

 bones closely covered with minute teeth. Gills two and ;t half ; 

 pseudobranchiae developed. Gill-rakers short and thick 



Dorsal originating in advance of the level of the hinder angle 

 of the wrists ; its rays are simple, the second the longest, and the 

 last is not connected with the tail by membrane. Anal commen- 

 cing in advance of the tip of the adpressed dorsal ; and not 

 nearly reaching backwards to the base of the caudal; it is 

 similar in form to the dorsal, but the rays are longer, and the 

 last is connected by membrane with the tail. Anterior three or 

 four pectoral rays subequal in length, the others decreasing 

 rapidly: they are simple and their tips are free and a little 



