128 Proceedings of the Royal Irish Academy. 



described, except for the correction of a clerical or printer's error by which the 

 number of rays in the dorsal fin is given as 210 instead of, apparently, 110.' 

 Description. — Head contained abont 5J times in total length without 

 caudal fin, rather compressed, about twice as long as broad, and as deep as its 

 length wilhout the snout. Eye 4 times in head, slightly shorter than the 

 snout, the length of which is subequal to the width of the nearly flat inter- 

 orbital space. The extremity of the snout is blunt and abrupt, with a median 

 prominence in front of the eyes. From the snout the dorsal profile rises 

 gently to tlie origin of the dorsal fin, which is opposite the origin of the 

 pectorals and a little in front of the origin of the ventrals ; the height of the 

 body at the base of the pectorals is slightly less than double its width at the 

 same point and about f the length of the head. 



Mouth terminal, jaws subequal, gape slightly oblique, hinder extremity of 

 maxilla behind vertical from eye. 



Praemaxilla with 1 (or 2 closely apposed) fang anteriorly, but at some 

 distance from the symphysis, followed by about 15 smaller sharp teeth in a 

 single diminishing series. Mandible' with 1 or 2 small teetli near the 

 symphysis, followed by 2 fangs, separated by about 3 smaller sharp teeth, 

 of which the last may be nearly as large as the second fang. The 

 praemaxillary fang smaller than the anterior mandibular fang. Vomer with 

 about 4 teeth on either side. 



Pectoral fin with a narrow base and 13 rays, the longest rays extending 

 about halfway to origin of anal, about f as long as head ; ventral set a little 

 behind pectoral, with 9 rays, the longest about f the length of the longest 

 pectoral rays. None of the rays of either fin truly filamentous. Dorsal fin 

 commencing opposite pectoral with about 110 rather long and slender rays, 

 continuous throughout as to fin membrane and spacing of rays, but showing 

 indication of subdivision by inflection of outline (reduction in length of rays) 

 at the tenth ray ; the first four rays (broken in type) possibly somewhat 

 produced. Anal fin with rays shorter than the corresponding rays of dorsal. 

 Skin delicate and rather loose ; scales rather small, thin, cycloid, present 

 everywhere except on jaws, underside of head, and fins ; transverse formula 

 behind pectorals apparently ca. 6/ca. 15. Lateral line indefinite posteriorly. 

 Coloration in life silvery, after preservation greyish-brown, with the head, 

 vent, and marginal fins darker. 



Length of the type 237 mnis. (232 without the caudal rays). 



' A re-examination of the specimen in the British Museu)u gave, in three successive 

 counts, 104, 108, and 108 as the number of rays in the dorsal fin. I am indebted to Mr. 

 J. Green, who drew the specimen for reproduction, for calling attention to this error. 



