CATALOG OF THE FOSSIL FISHES IN THE CARNEGIE MUSEUM. 



403 



position of the pectoral fins, and by the greater number of scales in the vertical 

 series below the vertebral axis. The pre-operculum is also much wider than in 

 either Dapedius or Tetragonolepis. 



The typical species is H. drosera (Egerton), from the Upper Lias of Wurtem- 

 berg, which by some authors is included in the same genus with Tetragonolepis. 



Fig. 2. Dapedius politus Leach. (After Woodward, Cat. Foss. Fishes Brit. Mus., Pt. Ill, p. 131.) 



The characters exhibited by the undermentioned species, which forms the terminal 

 member of the group, may be regarded as confirming Wagner's recognition of this 

 genus as distinct from Tetragonolepis. 



11. Homoeolepis suborbiculata, sp. nov. (Plate LVIII, fig. 3.) 

 Type. — Complete fish in counterpart; Carnegie Museum Cat. No. 4762, 4762a. 



A large species attaining a length of about 33 cm. Maximum depth of trunk 

 about equal to its length (exclusive of the caudal fin) , and three and one-half times 

 as great as the depth of the caudal pedicle. Head with opercular apparatus 

 rather less than four times in the total length; the external bones almost smooth, 

 with very few small sparse tubercles. Marginal teeth small, styliform, unicuspid. 

 Pelvic fins arising midway between the pectorals and the anal; dorsal and fins 

 each with about thirty rays, of which the more anterior ones are the most elevated, 

 the dorsal fin being decidedly acuminate in front in consequence of this radial 

 elongation. 



