230 PROCEEDINGS OF THE ACADEMY OF 



** Teeth of upper jaw enlarged in the outer row. Boreogadus. 

 /?. Lower jaw shorter, received within the upper. 

 * Head oblong conic and pointed ; the snout at 

 least twice as long as the eye. Chin barbel 

 well developed, 

 f Anterior dorsal little elevated. Mouth mode- 

 rate, maxillary extending at least as far 



as front of orbit Gadus. 



ft Anterior dorsal elevated at angle. Mouth 

 small, the maxillary not extending as far 



as orbit Melanogrammus. 



** Head abbreviated ; the snout blunt and little 



or no longer than the eye Brachygadus. 



3. Posterior dorsal and anal tins entire and even Lotin-e. 



* Anterior dorsal fin anterior, little behind the 

 pectorals. Mandible and vomer with enlarged 



teeth Molva. 



BB. Ventral fins simple at their base, thence divided. Phyoin;e. 

 * First dorsal fin produced at third ray. Caudal 



fin convex behind Phycis. 



** First dorsal fin rounded and not elevated. 



Caudal emarginated Urophycis. 



AA. Anterior dorsal fin composed of small fringes pre- 

 ceded by a slender ray Ciliatin^. 



* Head depressed behind. 



a. Snout without cirrus Onos. 



/?. Snout with cirrus Rhinonemus. 



** Head compressed Ciliata. 



AAA. Dorsal fin single and extending on back Brosmin^. 



*Chin with a single barbel Brosmius. 



Subfamily MERLUCIIN.E Gill. 



Genus MERLUCIUS Raf. 

 Onus Raf., 1810. 

 Stomodon Mitchill, 1814. 

 Hydronus Mindling, 1S32. 

 Merlus Gay. 

 Homalopomus Girard. 

 Epicopus Giinther. 



In North American waters are perhaps found two species of this genus occu- 

 pying different areas : one, identified with the European species, inhabiting the 

 seas of Greenland, and the Merlucius bilinearis occurring in more Southern 

 latitudes. 



Merlucids vulgaris Fleming. 

 Gadus merluccius Linn. 

 Merluccius borealis Swainson. 



Hah. Greenland. 



I retain the name of Fleming for this species since there appears to be some 

 doubt whether the one of the Mediterranean Sea and neighboring ocean is not 

 different. I have never seen the Greenland species, and therefore am in no 

 position to either confirm or contest its identification, which, however, is vouch- 

 ed for by the able Reinhardt. 



Merlucius bilinearis Gill. 

 Stomodon bilinearis Mitchill, Rep., p. 7, 1814. 

 Gadus merlucius Mit. 

 Gadus albidus Mit., Journ. Acad. N. S. Pa., i. p. 409. 



[Sept- 



