FISHES OF CEARA, BRAZIL JORDAN AND BRANNER I7 



Rio cle Janeiro, to Dr. Branner. It was found in the Barra do 

 Jardim, Serra do Araripe, State of Ceara. This specimen in a con- 

 cretion, represented in counterpart, is one of the most perfect of 

 fossil fishes, showing most distinctly the eye-ball and the dark pig- 

 ment which lies in streaks along the rows of scales. It was at first 

 identified by us with Notelops brama, but the distinctness of the lat- 

 eral line and the small size of the teeth render this identification un- 

 tenable. The genus Calamopleurus is very close to Elops, having 

 the same general structure of the head and the same extension of the 

 scales on the tail. 



The firmer character of the suborbital bones and the insertion of 

 the ventrals furnish the only tangible difference, unless we consider 

 the greater elongation of the body in Elops. 



^ 



Fig. 9. — Calamopleurus cylindriciis Agassiz. 

 Cretaceous of Ceara, Brazil. Partial restoration of type. 



Head 3|- in length to base of caudal; depth about 4 in body, i\ in 

 head. Eye 5 in head, ly^ in snout, snout 3! in head, head as long 

 as from gill opening to last ray of dorsal (bones of head all more or 

 less crushed). Scales about 13-120-18. Mouth large, oblique, the 

 maxillary extending well beyond eye, i}^ in head; tee-l^'small, sharp, 

 even, not one-fifteenth diameter of eye; opercle broadly triangular, 

 with the broad base anterior, the lower suture separating it from the 

 subopercle, distinct and very oblique; upper part of opercle covering 

 more than one-third of the bone separated from the rest by a hori- 

 zontal mark indicating a ridge or suture, this perhaps due to crush- 

 ing; subopercle nearly twice as long as deep, nearly half as large as 

 opercle ; preopercle broadly rounded, the upright limb directed some- 

 what forward ; a large trapezoidal plate on cheek extending from 

 level of lower part of eye to angle of mouth; this is a little longer 

 than high and deepest posteriorly ; two parallel horizontally elongate 

 suborbital bones behind eye ; these- about equal in size and each about 

 twice as long as high ; rest of orbital chain obscurely shown. The 



