1899.] NATURAL SCIE>X'ES OF PHILADELPHIA. 487 



row, and rutming parallel with it, and the eye. the rest of the 

 head naked except the scales in postocular region which are a 

 continuation of the series on the cheeks. Lateral line running 

 along the upper part of the body, and not running along the centre 

 of the caudal peduncle laterally, sloping from its dorsal position 

 gently till it terminates in the centre of the caudal fin. Scales 

 about 64. The general polor of the specimen appears to have been 

 of an olivaceous tinge, the light spots at the base of posterior rays 

 of the D. very distinct. Irides reddish. Dark oblique bands 

 above the lateral line, and longitudinal bands below. Scales of 

 the thoracic and postoccipital region smaller than those on the 

 sides of the body. Upper caudal lobe the longest. 

 No. 23,286. 



7. Genyoroge marginata (Cuvier and Valenciennes). 



Diacope marginata Ciivier aud Valenciennes, Hist. Nat. Poiss., II, 

 1828, p. 320. 



Form of the body sparoid, Avith the antero-dorsal region pro- 

 duced. The profile line from the snout to the occiput is straight 

 and from the latter point to the origin of the D. convex. The 

 lower profile line from the snout to the A. is nearly straight or 

 only very slightly convex. Head a little over 3 in the total length 

 and the depth of the body about the same. Eyes placed in the 

 upper anterior portion of the head, nearer the snout than the 

 opercles and about 4 in the length of the head. IMouth large, 

 the maxillaries extending posteriorly for about one-third the diam- 

 eter of the eye. The distal extremity of the maxillary bones is 

 dilated and about equal to one-half the diameter of the eye. 

 The upper and anterior portions of the maxillaries are ensheathed 

 by the orbital bones. Nostrils separated from the anterior margin 

 of the eye by a space that is greater than the space between them- 

 selves. Interorbital space convex, not equal to the diameter of 

 the eye, equal to the space between the anterior nostril and the 

 anterior margin of the eye. Posterior margin of the prseopercu- 

 lum finely serrated above the notch, below and on the posterior 

 edge of the lower margin strongly serrated. Interopercular knob 

 dev^eloped and fitting closely into the prpeopercular notch. Poste- 

 rior margin of the operculum developed into a flap. Suprasca2:)ula 

 serrated. Origin of the D. over the tip of the opercular flap, 

 both of these are situated posterior to the origin of the P. D. x, 



