DISCUSSION OF SPECIES AND THEIR DISTRIBUTION. 



445 



greatest height over the pectorals, the contours then descending in almost straight lines to 

 the base of the tail. The thickness of the body (0) is less than in C. aretifrons, being con- 

 tained nearly 17 times in the standard length. 



The scales are thin, deciduous, smaller than in f. arctifnms. There are about 40 

 scales in the lateral line, which is slightly curved over the pectoral, and, as nearly as c;in 

 be dcterniiued in the denuded specimens before mc, about lli rows above and 12 below tlie 

 lateral line at the broadest part of the body. 



The length of the head (2.">) is one-fourth of tlie standard length and about 3 times 

 the diameter of the eye (9), or the distance from the snout to the upper eye (9). The inter- 

 orbital space is wide (4), equal to the length of the snout, and diagonally crossed by a strong 

 ridge, a continuation of two ridges which form the upjier boundary of the lower and the 

 lower boundary of the upi)er orbit. 



The length of the maxillary (11) is less than half, that of the mandible (13) more than 

 half, that of the head. The teeth are minute, in single rows, closely set in the Jaws, some- 

 what stronger upon the )>Iind side. A strong short spine above the snout, at the anterior 

 termination of the ridge at the lower margin of the upper eye. Hence the specific name 

 uiiiconiis. 



The dorsal fin begins at the side of the i)rcoibital spine, its anterior rays being slightly 

 crowded over u))on the blind side. It is com])oscd of 73 to 75 simple rays. Its greatest 

 height (13) is half the length of the head. 



The distance of the anal from the snout (33) is one third of the staiulard length. The 

 number of rays is tiO; their longest (13) equid in length to the longest dorsal rays. 



The caiulal is pointed, triangular, subsessile; its length (22) twice that of the maxillary 

 (11) and two-thirds the distance from the snout to the anal (33). The pectorals are inserted 

 liir below the lateral line. The i)ectoral of the colored side is twice as long (18) as the 

 diameter of the eye, that of the blind side as long (13) as the longest dorsal rays. The for- 

 mer is composed of 10 rays, the latter of 4. 



The length of the ventrals (11) is half that of tlic caudal. They are asymmetrically 

 placed, as is describcil under the generic diagnosis. 



Radial formula: D. 73-75; A. 60; P. 4, right, 10, left; L. hit. 40. 



Color, ashy gray, with dark lateral line. Eyes black. 



Current number of speeimei 

 Locality 



26, oo;). 

 87(1 and R71. 



Milli- 

 iiietei a. 



lOOtlis of 

 leDgtb. 



Extreme leugtb 



Leiifith to origin of middle eaudal ravfi 

 Bod.v : 



GreateBt beigbt 



]^ea8t height of tail 



Head : 



Greatest length 



r>i»taDee from snout to iijiper eye . 



Distance from snout to lower eye. 



Width of interorbital area 



Length of snout 



Length of maxillary 



Length of mandible 



Diameter of orbit, longitudinal 



Dorsal [spinous) : 



Distance from snout 



Greatest height 



Anal; 



Distance from snout 



Height at longest ray 



Caudal : Length of miildle rays 



Pectoral : 



Distance from snout 



Length. 



Ventral: 



Distance from snout on colored side. 



Length 



Dorsal 



Anal 



Pectoral 



Number of scales in later:il line 



4R., 



47 

 11 



25 

 » 

 5 

 4 

 4 



11 



la 



9 



5 

 13 



33 

 13 



22 



28 

 18-13 



2G 



11 

 75-73 



00 

 10 L. 



40 



