THE STATE GEOLOGIST. 99 



equaling about one-third that of the abdominal region. Cranial 

 bones finely granulated. Pelvic fins arising midway between the 

 pectorals and the anal; dorsal and anal fins nearly equal in size, 

 and the former arising opposite to the middle of the latter. Scales 

 mostly smooth, but sometimes in part longitudinally striated, 

 the striae terminating in the coarse serrations of the posterior 

 border which characterize the principal flank-scales; many of the 

 flank-scales deeper than broad." 



The distribution of this species is identical with that of its 

 congener, and, like the latter, it is more abundant at Durham than 

 elsewhere. 



Genus Dictyopyge Egerton. 



Distinguished from Catopterus only by the more anterior posi- 

 tion of the dorsal fin, which never arises behind the origin of 

 the anal. 



Dictyopyge macrura W. C. Redfield. 



1841. Catopterus macrurus, W. C. Redfield, Amer. Journ. Sci., vol. xli., p. 27. 

 1847. Dictyopyge macrura, Sir P. Egerton, Quart. Journ. Geol. Soc, vol. iii., 



p. 276, pi. viii., pi. ix., Fig. I. 

 1857. Catopterus macrurus, W. C. Redfield, Proc. Amer. Assoc. Adv. Sci. 



1856, pt. ii., p. 186. 

 1888. Dictyopyge macrura, J. S. Newberry, Monogr. U. S. Geol. Surv., vol. 



xiv., p. 64, pi. xviii., Figs. 1, 2. 

 1895. Dictyopyge macrura, J. S. Newberry, A. S. Woodward, Cat. Foss. 



Fishes Brit. Museum, pt. iii., p. 4, text-fig. 1. 



A species attaining a total length of about 15 cm. Length of 

 head with opercular apparatus somewhat less than the maximum 

 depth of the trunk, and contained nearly five times in the total 

 length of the fish; depth of caudal pedicle less than one-half of 

 that of the abdominal region. Cranial bones externally orna- 

 mented with fine granulations. Pelvic fins arising midway be- 

 tween the pectorals and anal fin ; dorsal at least as high as long, 

 arising slightly in advance of the anal and nearly as large as the 

 latter; anal with about 30 rays, and extending almost to the 

 base of the caudal fin. Scales smooth, not serrated. 



