50 NORTHERN ZOOLOGY. 



[22.] 3. Cottus (Aspidophorus) monopterygius. (Cuvier.) Aspidophore 



with one Dorsal. 



L'Aspidojihore a une seule dorsale. Cuv. et Val., iv., p. 224 ; vi., p. 554. t. 169. 



The two preceding jLspidophori have the second dorsal commencing close to the 

 end of the membrane of the first, and the mouth situated rather behind the tip of 

 the snout ; three other species, with approximated dorsals, are described in the 

 Histoire des Poissons, but they have the under jaw longer than the upper one, and 

 the snout neither projects beyond the mouth nor supports spines. Three species 

 also are described with their dorsals some distance apart, and these have the jaws 

 of equal length, and thick spines in the first dorsal. 



The species we have now to notice is distinguished from all others by having only one 

 dorsal placed in the middle of the body, over the anal, both these fins consisting of few rays, 

 all flexible, the first ray alone not appearing articulated. It is the most slender of the genus, 

 the height of the body, at the ventrals, not exceeding one-fifteenth of the total length. Before 

 the dorsal the body is four-sided, or if the facets produced by the keels of the scales be taken 

 into account, eight sides may be reckoned : the tail is six-sided. The snout projects beyond 

 the mouth. 



Fins.— Br. 6; D. 1/4; A. 1/4; V. 1/2 , C. ; P. 11. 



This Aspidophore was supposed, by Bloch, its first describer, to come from India, 

 and it was named by Lacepede Aspidophoroide Tranquebar ; but it has lately 

 been discovered to be an inhabitant of the Greenland Seas, so that this sub-genus 

 belongs enth-ely to the Northern hemisphere, and chiefly to the higher latitudes. 



(Hist, des Poiss.) 



[23.] 1. Hemitripterus Americanus. (Cuvier.) The Sea-raven. 



Family, Cottoidese. Genus, Hemitripterus, Cuvier. 



Acadian Bull-head. Penn., Arct. Zool., ii.. p. 1 18. No. 101. 



Yellow Scorpaena (Scorpwna flava). Mitchill, Ph. Trans. New York, i. p. 382, t. 2. f. 8. 



L'Hemitriptere de l'Amerique {Hemitripterus Americanus). Cuv. et Vai.., iv. p. 268. 



The genus Hemitripterus is considered by Cuvier as exactly intermediate 

 between the Cotti and Scorpcence, the two distinct dorsals with the broad head 

 giving it a resemblance to the former, while its many and various tentacula, or 

 barbels, and its palatine teeth, bring it near the latter. The head is bristled^ 



