"""Ua"'] PROCEEDINGS OF THE NATIONAL MUSEUM. 83 



Moiitb large, the lower jaw wholly included, the dentigerous portion 

 of premaxillaries shutting outside of mandible, with a deep notch an- 

 teriorly, which receives tip of mandible. A strong symphyseal knob. 

 Maxillary, in adults, about reaching vertical from posterior border of 

 orbit, nearly half length of head. Teeth in broad bands on jaws, vomer, 

 and palatines. 



Interorbital space narrow, concave, with a pair of low ridges much 

 diverging behind, its width 2^ in orbit. Eye large, equaling snout, 4 

 in head. 



Head very rough, the spines compressed, knife-like, disposed in six 

 well defined series; the upper contains the nasal, the conspicuously 

 projecting preocular, the supraocular, postocular, tympanic, occipital, 

 and nuchal spines. The paroccipital ridge contains a single spine im- 

 mediately behind orbit, and one at its posterior extremity; the 

 bridge across cheeks is very strong, its ridge continued forwards onto 

 preorbital bone and containing four very strong spines. Margin of pre- 

 orbital with two diverging spines. Upper spine of preopercle very 

 strong, in line with suborbital ridge, with a smaller spine at base ; three 

 other preopercular spines below this, directed downwards and back- 

 wards, the lower nearly obsolete in adults. No pit on occiput or below 

 front of eye. Gill-rakers short and broad, about as high as wide, the 

 longest about one-half diameter of pupil; seven in number on anterior 

 limb of arch. 



Dorsal spines weak, very low, the longest equaling diameter of orbit, 

 the eleventh half this length. Soft dorsal short and higli, its longest 

 ray 2i in head. Caudal truncate, its length equaling length of snout 

 and eye. Anal spines not very strong, the secontl slightly longer and 

 stronger than the third, its length equaling length of snout, Ih in soft 

 rays. Ventrals not reaching vent. Pectorals with narrow non-procum- 

 bent base, their width about equaling eye. 



Scales large, thin, everywhere ctenoid, covering breast, cheeks, oper- 

 cles, top of head, and a part of snout ; wanting on maxillaries and man- 

 dibles. 



Head with simple'slender filaments, usually one to each spine. Each 

 scale of sides with a fringe of minute filaments around edge. 



Color: Light red, with irregular dark-greenish olive markings on up- 

 per half of sides. A blotch of same color below eye, one above opercu- 

 lar spine, and a few rounded spots on soft dorsal, more numerous on 

 caudal. Lower side of head white. Buccal and gill cavities and peri- 

 toneum bright white. 



Four specimens, the longest ten inches in length, from Stations 2996 

 and 3011, in 112 and 71 fathoms. 



43. Icelinus cavifrons sp. nov. 



Body not slender; the depth 4^ in length; the depth of caudal 

 peduncle about one-third its length ; head 2f to 3. 



