PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 141 



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

 usual color is also different. 



The type specimens have been presented to the National Museum, 

 and they are numbered 28,396 on the Museum Eegister. The largest 



measured If inches. 



Table of Measurements. 



Locality San Diego, Cal. 



Dimensions. 



Extreme length 



Length to base of caudal fin 



Body : 



Greatest height 



Greatest width 



Least height of tail 



Length of caudal peduncle — 

 Head : 



Greatest lensth 



Greatest width 



Width of interorbital area 



Length of snout 



Diameter of orbit 



Dorsal : 



Distance from snout 



Length of base , 



Anal : 



Distance from snout 



Length of base , 



Caudal: 



Length of middle rays 



Pectoral : 



Distance from snout 



Length 



Anterior margin of ventral disk : 



Distance from snout 



Length 



Dorsal 



Anal 



G. rhessodon. 



Inches 

 and 



lOOths. 



1.40 

 1.20 



lOOths 



of 

 length. 



G. reticulatus. 



Inches 



and 

 lOOths. 



2.50 

 2.05 



lOOths 



of 

 length. 



22.5 



18 

 34.5 



San Diego, Cal., January 15, 1881. 



DESCRIPTIOIV OF A IVEVT GENUS AND SPECIES OF COTTID^IE. 



By TV. N. LOCKI^GTON. 



Chitonotus gen. nov. 



Allied to Artedius Girard. 



Anal papilla of males excessively developed, and terminating in a 

 narrower crescentic portion, from which 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 Artedius. Type Chitonotus mega- 

 cephalus Lockington. 



This genus is instituted for the reception of Artedius pugettensis Stein- 

 dachner (Ichthyol. Beitriige V. 133) and of the species here described. 



