i6 Carl L. Hubbs 



From labialis, caiidalarius differs in the number of fin-rays and scales, in 

 which characters it agrees with the Pacific species (punctatus and oaxacac). 

 From these two species caiidalarius differs in form and proportions, as noted 

 in the course of the following description. 



In its form Prof undid us candalarius suggests a pike. The back is heavy 

 at the shoulders, but flat in profile back to the posteriorly inserted dorsal fin. 

 The top of the head is flatter than in related species, both transversely and 

 longitudinally; the anterior profile is a little incurved. The snout is rather 

 more produced and pointed than in the Pacific species. Depth of body, 3.4 

 (3.5) in total length, minus the caudal; least depth of caudal peduncle, 2.3 

 (2.2) in head, 1.35 (1.6) in its length from anal fin. Length of head, 3.25 

 (3.6); eye, 4.5 (4.5), larger than in the species of the Pacific drainage; 

 upper jaw, 3.2 (3.6), not reaching to below eye; least preorbital width, 2.7 

 (2.8) in postorbital length of head, decidedly wider than in punctatus and 

 oaxacac. The Ijod}' and the head are much more compressed than in the 

 species just named: greatest width of head, 1.65 (1.7) in its length; least 

 interorbital width. 2.5 (2.5). Branchial aperture free to upper opercular 

 angle. Gill-rakers only about as long as the pupil, 15 (16) on the lower limb 

 of the outer arch. Teeth in rather broad bands in the jav/s, the outer series 

 a little enlarged. 



Scales larger than in P. labialis, in 33 (35) rows from 1)ranchial apertiire 

 to caudal base, 12 (13) longitudinal rows from pelvic fin to and including 

 the mediodorsal series. 



Fin rays: dorsal, 12 (12) ; anal, 14 (15) ; pelvic, 6 (developed rays). 

 Dorsal fin set farther backward than in punctatus and oaxacae. the interval 

 between its origin and the caudal base being contained 3.2 (3.2) times in the 

 total length without caudal, rather than from 2.65 to 3.1 times. In the male 

 holotype the dorsal fin is just as high as long, the anal a little longer than 

 high ; in the female specimen the dorsal is a little higher than long, while the 

 two dimensions of the anal are about the same. The broad caudal is truncate 

 behind ; the pectoral is broadly rounded ; the pelvic short, not nearly reaching 

 to anus. The intestine is little coiled. 



The coloration is not very distinctly preserved. The scales of the male 

 type are light where exposed, but marked by dark crescents at their bases ; 

 dark streaks are evident between each of the longitudinal scale .rows. There 

 is a dark axillar blotch. The fins are not distinctly marked ; the anal prob- 

 ably had a light margin. The female specimen is rather plainly colored, the 

 scales marked by dark reticulations ; an indistinct dark lateral streak was 

 apparently developed; coloration of fins as in the male. 



