NATURAL SCIENCES OF PHILADELPHIA. 241 



As the Motella tricirrala has five-rayed ventral fins, the second dorsal not 

 united with the caudal and anal, and only one barbel to the lower jaw, and 

 thus has only one character of least importance mentioned by Rafinesque, I 

 am not prepared to accept his name for the genus, although he quotes the 

 figure of Rondelet. The French name of Cuvier cannot be retained, and 

 Risso's comes next in order. 



Two species are found in North America which represent European ones, 

 and are very closely related to their respective analogues. 



Onos Reinhaedii Gill. 

 Motella mustela Reinhardt, Kong. Dansk. Vid. Selks. Nat. og Math., vol. vii. 



pp. 115, 128. 

 Motella Reinhardi Kroyer. 

 Hab. Greenland. 



Closely related to the 0. mustela of Europe, and agreeing in having five 

 barbels, one to each nostril and one at the chin. 



Onos ensis Gill. 



Motella ensis Reinh., op. cit., vol. vii. pp.115, 128. 

 Hab. Greenland. 



Very closely allied to the M. tricirrata Nils., and like it provided with three 

 barbels, one at each anterior nostril and one at the chin. 



Genus RHINONEMUS Gill. 

 Rhinoxemus caudacuta Gill. 



Motella caudacuta Storer, Proc. Boston, vol. 1848, p. 5 ; Mem. Am. Ac. 

 Motella cimbria? Bell, Canadian Nat. and Geol., vol. iv. p. 209, 1859. 



Hab. Massachusetts to Gulf of St. Lawrence. 



Very closely related to the Mitella cimbria of Europe, but has " the poste- 

 rior margin of the second dorsal and anal fins, as well as the edge of the 

 caudal fin, of a dark slate color," and D. 53. A. 48. 



Genus CILIATA Couch. 

 Couchia Thompson. 



ClLIATA ARGENTATA Gill. 



Motella argentata Reinhardt. 

 Couchia argentata Giinther, ii. 363. 



Hab. Greenland, (Reinhardt ;) and Nahant, Mass., (Dr. J. H. Slack.) 



Subfamily BROSMINJE Gill. 



Genus BROSMIUS Cuv. 

 The American species of this genus are involved in some uncertainty. 

 Although attributed to Greenland, it is at least nearly certain that the 

 European Brosmius brosme is not found in our southern waters, but it is not, 

 perhaps, quite clear what name the American analogue shall bear. Lesueur 

 has described and figured a species from Marblehead, to which he gives, both 

 in his description and figures, a protuberant lower jaw and a double barbel ; 

 it has been named Brosmius flavesny, and is stated to be salted like the 

 common cod, much esteemed as food, and to be rare on the banks of New- 

 foundland. No specimens with the characters noticed have since been ob- 

 tained, and, if only the double barbel had existed, it might not have been 

 impossible that Lesueur had obtained a single specimen of the common cusk, 

 which exhibited such abnormal characters, the duplication of the barbel 

 having been noticed in a specimen of the Gadus arenosus already referred to. 

 Such, however, appears to be highly improbable, for it is not simply a double 

 barbel which characterizes it, but at least, in addition thereto, a longer lower jaw 



1862.] 



