NATURAL SCIENCES OP PHILADELPHIA. 509 



latitudes, where they apparently represent the Cottoids of the north, especially 

 the Oncocotti. They appear to belong to two natural subfamilies, but one of 

 them is very imperfectly known. 



Subfamily CILENICHTHYIN^E Gill. 



Synonymy. 

 Trachinina part, (group) Giinther, Catalogue of the Acanthopterygian Fishes. 

 Nototheniina part, (group) Giinther, Annals and Magazine of Natural History. 



Pinna dorsalis prima a pinna secunda disjuncta. Pinnae dorsalis secunda 

 analisque sat altae ; prior radiis non ramosis. Pinnae pectorales basibus latis et 

 emarginatis. Pinnae ventrales utraque radiis spinosa una et quinque articulatis, 

 externis simplicibus, internis ramosis. 



First dorsal fin separated from the second. The latter and the anal are mode- 

 rately elevated and of nearly uniform height. The rays of the second dorsal 

 are simply articulated. 



Pectoral fins with their bases broad and subvertical, but emarginated. 



Ventral fins well developed and provided with a spine and five soft rays as 

 usual, bat with the external of the latter simple and the internal alone branched. 



The subfamily of Chaenichthyinas is thus restricted to the genus Chamichthya 

 as recently extended by Dr. Giin'her. Only two species are known, each of 

 which represents a distinct genus. 



Genus Ch^enichthys Richardson. 

 Channichthys Richardson, Annals and Magazine of Natural History, 1844. 

 Chsenichthys Richardson, Ichthyology of the Voyage of the Erebus and Terror, 



p. 12. 

 Chaenichthys Giinther. 



Linea lateralis scutellis parvis armata. Rostrum spina recurvata munita. 

 Pinna dorsalis prima secunda bene separata, alta, spinis septem sustentata. 



Lateral line armed with small osseous scutellae. Snout provided with a re- 

 curved spine. Teeth cardiform, in a band in each jaw. First dorsal fin not 

 contiguous to the second, elevated and provided with about seven radiating 

 spines. Caudal fin convex or subtruncated. Pectorals fins with its hinder 

 border subtruncated above and obliquely convex below. Ventral fins well de- 

 veloped, and about as long as the pectoral. 



Chwnichihys is here retained with the same limits assigned to it by Sir John 

 Richardson and by Dr. Giinther in his " Catalogue of the Acanthopterygian 

 Fishes." Subsequently, there was referred to it, by the latter gentleman, a 

 species which doe3 not agree with the characters originally given to it, and 

 which appears to be the representative of a different genus. 



Chsenichthys rhinoceratus, Richardson. 



Chasnichthys rhinoceratus Rich., Ichthyology of the Erebus and Terror, 

 p. 13, pi. vi., figs. 1, 2, 3. 



This species is found among the kelp weed on the shores of Kerguelen'sLand, 

 and attains a length of nearly two feet. Specimens were caught by the hook. 



Genus Champsocephalus, Gill. 

 Chsenich thys sp. Giinther, (1861.) 



Linea lateralis inerme. Rostrum spina obsoleta. Pinna dorsalis spinosa se- 

 cundae approximata, spinis decern munita. 



Lateral line unarmed, formed by small tubules. Snout with no spine. Teeth 

 of the jaws cardiform. First dorsal fin contiguous to the second, as long, or 

 longer, than high, sustained by ten spines. Caudal fin subtruncated or scarcely 

 convex. Pectoral fins large, subtruncated behind, above and below obliquely 

 convex. Ventral fins well developed, and about as long a3 the peetoral. 



1861.] 



