370 THE KELATIONS OF CYCLOPTEROIDEA GILL. 



GENERA. 



Three well-defined geaera represent the Cyclopteridce, viz : 



1. Cyclojytei-us hianaius, Syst. Nat., 10. ed.,p. 260, 1758= Lwmjjits Cuv. 



Type C. lumpus Liun. 



2. Eumicrotremus Gili, Proc. Acad. Nat. Sc. Phila., 1864, p. 190. 



Type E. spinosiis=^Cydo][)terus spinosus Miiller. 



3. CycloptericUhys Steind., Ich. Beitr., x, p. 14, 1881. 



Type C, ventricosus^^Cyclopterus ventricosns Pallas. 



LIPARIDID.ai. 



Synonyms. 



= Liparididce, Gill, Arrangement Families Fishes, p. 4 (name), 1872. 



= Liparididce, Putnam, Proc. Am. Assoc. Adv. Sci. 1873, v. 22, B, p. 357 (diagnosis*), 



1874. 

 = Liparididw Collet, Norweg. North Atlantic Exped., Fishes, p. 50 (name), 1880. 

 = Liparididw Jordan and Gilbert, Syn. Fishes N. Am., p. 738, 1882. 

 = Liparidce Jordan, Cat. Fishes N. Am., p. 115, 1885. 

 Discoboles gen., Cuvier, et al. 

 Cyclopteridce gen. Bonaparte, GUnther, et al. 

 Giiiesocoidei gen., Bleaker, 1859. 



DIAGNOSIS. 



Cyclopteroidea with an oblong or elongate body, the abdominal cavity 

 very short, the neural and hfemal spines moderately deflected back- 

 wards and moderately elongated, the interspinals bent backwards from 

 the vertebral spines, ribs not continued backwards on the caudal ver- 

 tebrfe, dorsalis and analis elongated and commencing forwards near the 

 head, spinous and soft rays not segregated into distinct fins, cranium 

 with the chrondrocranium much reduced by ossification and with the 

 stay styliform, elongated, and crossing the preoperculum to connect 

 with its external margin. 



DESCRIPTION. 



Body elongate, antrorsiform, more or less attenuated to the caudal fin. 



Scales entirely absent, the body being naked and smooth (except in 

 males during the breeding season) and the skin more or less lax. 



Lateralis obsolete. 



Head moderate or rather large, covered by skin continuous with that 

 of the body and concealing all the bones. 



Eyes lateral, mostly or entirely in the anterior half of the head. 



Wostrils double; the anterior and posterior separated by a narrow 

 bridge. 



*The union of the suborbital chain into one long bone reaching from the maxiliary 

 to the posterior edge of the preoperculum and the long slender ray-like iuteropercu- 

 lum overlying the branch iostegal rays are marked characters of the Liparididce. Put- 

 nam, o. c, p. 338. 



