Ellis ■ 'I'm. Ti aim, \i i ■, roGNATHs. 



3<>7 



Mi. 



h. Head and body without dark markings. 



i. No azygous plates, adipose spine without fin; a faint pale band on 

 each side; clavicle and operculum with blue reflections; a large 

 black spot on the distal part of the dorsal rays. Head 3.1, 1.3 



in the depth; D. I, 7; A. I, 6; V. 6; P. 1.5; lateral plates -; eye 



21 

 3 m the head, 1.33 in the interorbitals (Cope), acutus Cope. 30. 

 1*. Three or four azygous plates in front of the adipose. Top of the 

 head brown, a yellowish band across the eyes, body otherwise 

 without color. Dorsal with five longitudinal rows of dark 

 spots. Head 4; depth 3; D. I, 7; A. 7; V. 6; P. I, 9. Lateral 



pIates 20 aurofrenatus Eigenmann & Kennedy. 31. 



Body with a dark stripe or a few large dark blotches. 

 j. Dorsal spine less than 2 in the head, a little longer than the pectoral 

 spine. 

 k. "Fontanel long, reaching forward to the anterior border of 

 the eye, backwards to the base of the occipital process. 

 Four or five azygous plates. Strongly compressed, head 

 and depth nearly equal, 3 to 2.5 in the length. Snout 

 i-3 to 1.5, eye 4.5 to 5, and interorbital 3 to 3.75 in the 

 head. A blackish gray stripe along the upper half of the 

 body, beginning just under the dorsal and ending on the 

 base of the caudal. Upper scutes each with a dark vertical 

 bar. Near the upper end of the first five to ten lower 

 plates is a blackish spot or short oblique stripe. Dorsal 

 plain. D. I, 8; V. I, 6; C. 16; A. I, 7; P. I, 10; lateral 



23 

 plates — " (Steindachner) treiilii Steindachner. 32. 



kk. Fontanel small, not reaching the occipital process. Two or 

 three, rarely four, azygous plates. Body slender, depth 3 

 to 3.1; head 3 to 3.25 and 3 -5; eye 3.5 to 4 in the head, 

 1.6 to 1.7 in the interorbital, and 1.5 in the snout. Inter- 

 orbital 2.2 to 2.3 in the snout. A very large blackish 

 brown spot on the anterior part of the body, frequently 

 reaching back to the second or third dorsal ray, usually 

 broader below, ending on the lower side of the lateral line. 

 A second smaller longer dark spot lies along the lateral 

 line in the vicinity of the adipose; often a small caudal 

 spot, which sometimes fuses with the other spots. D. I, 



8; A. 7; V. 7; lateral plates - r 23 (Steindachner). 

 21 or 20 



ehrhardti Steindachner. ^ 



jj. Dorsal spine about 2 in the head, the diameter of the eye less than 



the pectoral spine and about equal to the fourth or fifth dorsal 



ray. Fontanel slender and rather long. Depth 3.2 to 3; head 



3-3- Snout long and pointed, 1.6 in the head, quite steep in front. 



