20 THE DISCOBOLI. 



matter lies in thin plates, often forming cells and chambers similar to those 

 to be noticed in the bones of Lophius. The thii-d suborbital is thin and 

 broadens as it extends back to the preopercle. The interopercle is more 

 blade-like than in the Liparididae. On one genus the pores around the 

 mouth are tubular, and form barbels. 



When Bonaparte, 1831, first used the family name Cz/clopteridce, he in- 

 cluded Liparis with the Lumps. In the present writing the family is made 

 up of Giinther's subfamily of 1861, Cijcloptenna, with the addition of a genus 

 of recent discovery, first characterized in these pages. 



GENERA AND SPECIES OF CYCLOPTERIDiE. 



Barbels none ; disk anterior, sub-cephalic, 

 larger tubercles in rows, separated, 

 larger tubercles not in rows, crowded, 

 shaped more liice the Lump, 

 shaped more like a Diodon, 

 Barbels present; disk central, subabdominal, 

 lateral tubercles minute, 



CYCLOPTERUS. 



Body more or less compressed toward the back, somewhat triangidar in 

 a transverse section at the first dorsal, covered with conical, rough, bony 

 tubercles; head short, thick, subquadrangular in a cross section; snout 

 blunt, rounded ; mouth anterior, opening slightly upward ; teeth simple, 

 small, arranged in a band ; eye moderate, lateral ; dorsals two ; caudal dis- 

 tinct; disk moderately large, anterior. On the species properly belonging 

 to Cjjcloptcnis, the first dorsal fin with nge becomes completely hidden by the 

 skin, and the larger tul)ercles of the flanks, though in regular series, have 

 a scattered appearance. On the larger specimens of the species belonging 

 to Eumicrotrcnms the large tubercles are very irregularly disposed and close 

 together. The history of Cyclopterus as a genus begins with Linne. Flem- 

 ing, 1822, says of it: '-This genus has been subdivided into (1) Cyclopterus, 

 having the body furnished with ridges of tubercles, as C. linnpus, and 

 (2) Leparis, having the body smooth, as L. vitlgaris and Moiitaf/ui." This 

 subdivision left the genus as recognized at present. 



