190 PROCEEDINGS OF THE ACADEMY OF 



Cyclopterus lumpus, L. 



Cyclopterus minutus, Pall. (Young). 

 Cyclopterus caeruleus, Mitch. (New York). 

 Lumpus vulgaris, Storer. 

 Lumpus anglorum, Be/cay. 



Hab. Greenland to New York. 



Is the American Cyclopterus identical with the European ? The latter has 

 not been examined by myself. 



Genus EUMICROTREMUS, Gill. 



Cyclopterin.e with the back gibbous ; the large plates less regularly 

 disposed, and obsolete on abdomen ; the eyes large and submedian ; the 

 branchial apertures elevated, and behind the ocular region : the spinous dorsal 

 well developed, provided with 6 or 7 spines ; and the ventral disk large. 



EUMICROTREMUS SPINOSUS, Gill. 



Cyclopterus spinosus, Fab. et al. 

 Hab. Greenland. 



Subfamily LIPARIDIN.E. 



Liparinae Gill Cat. 

 Liparidina Gthr. Cat. iii. 



Cyclopteroids with an elongated body, and long, uninterrupted dorsal 

 and anal fins, the anterior rays of which, especially of the dorsal, are spinous, 

 and with caudal vertebrae in greatly increased number, (Vert. 10 12+25 50. 



Genus LIPARIS, (Art.) Linn. 

 Cyclogaster Gron. 



Liparidina with a nearly or quite horizontal oral cleft : longer upper jaw ; 

 pluriserial tricuspid teeth ; a well developed ventral disk ou the breast, below or 

 partially behind the posterior half of the head ; the anus little in advance of 

 the anterior third of the length, and the origin of the anal fin not far be- 

 hind it. 



Type. Cyclopterus liparis L. 



This genus, even after the elimination of the L. iunicata of Kroyer, exhibits 

 considerable variation, especially in the relations of the dorsal and anal fins 

 to the caudal, these fins being, in some species, completely isolated, while in 

 others they are coalescent, and united in an almost anguilliform posterior fin. 

 In the latter, the nostrils also appear to be simple, while in the former the 

 posterior ones are tubular. These differences appear still further to be co- 

 incident with a disparity in the number of caudal vertebrae, and of the rays of 

 the vertical fins. Nevertheless, it is not deemed advisable to generically sepa- 

 rate the types so distinguished. 



But the differences between the Liparis tunicata of Kroyer, (Tidskrift, ser. 3, 

 B. i., 236), and the typical Liparides, appear to indicate a more decided de- 

 marcation, and the morpholological differences mentioned in the analytical 

 table are apparently coincident with difference in size ; it is, therefore, proba- 

 ble that the specie3 is the type of a distinct genus, for which the name of 

 Actinochir would be appropriate. For the present, however, it is retained in 

 the genus Liparis. 



The increase of our knowledge of the Greenland Liparidinse, since the pub- 

 lication of the " Catalogue of the Fishes of the Eastern Coast," is chiefly due 

 to Dr. Kroyer, who, appreciating the imperfection of our information, has 

 favored us with a monograph of those species. This has chiefly served as the 

 basis of the present article. ^ 



I omit, for the present, references to the Liparides of the British northern 

 travellers. 



[Sept. 



