PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 141 



ins in the fewer rays in dorsal and anal and in the tricuspid teeth. The 



usual color is also different. 



The type specimen3 have been presented to the National Museum, 



and they are numbered 28,390 on the Museum Eegister. The largest 



measured If inches. 



Table of Measurements. 



Locality San Diego. Cal. 



San Diego, Cal., January 15, 1881. 



DESCRirTIO.'V OF A IVEW GEIVrS AND SPECIE.^ OF COTTDD.i;. 



By TT. IS, LOCKIJ^GTOIV. 



Chitonotus gen. nov. 



Allied to Artedins Girard. 



Anal papilla of males excessively developed, and terminating in a 

 narrower crescentic portion, from wliicli springs a long tubular fila- 

 ment. First dorsal incompletely divided into two portions, the anterior 

 the shorter. Lateral line armed with a series of keeled scales, toothed 

 on keel and on hinder margin. Entire upper portion of body, save a 

 narrow area along the base of the dorsal fin, covered with small strongly 

 ctenoid scales. Other characters as in y^lri?a7«fs. Type Chitonotus mega- 

 cephalus Lockington. 



This genus is instituted for the recei)tion of ArtetUus pugettensis Stein- 

 dachuer (Ichthyol. Beitriige V. 133) and of the si^ecies here desci-ibed. 



