NATURAL SCIENCES OE PHILADELPHIA. 59 



condition of the species. They were obtained from the waters of Rock creek, 

 which flows into the Potomac river nearly opposite Analostan island. In 

 general appearance they resemble young shiners (Luxilus americanus), for 

 which they might easily be taken by superficial observers. Upon a closer ex- 

 amination, however, the generic features, as pointed out elsewhere, become so 

 obvious, that when once observed, they can never fail to attract attention. 

 The body is elongated and subfusiform in profile ; the peduncle of the tail 

 being stoutish. The head enters four times and a half in the total length. 

 The eye is of moderate development and circular in shape ; its diameter enter- 

 ing about four times in the length of the side of the head. The snout is sub- 

 conical, and the fact of its projecting beyond the lower jaw is a trait partaken 

 more or less by all the species of this genus ; the gape of the mouth is directed 

 somewhat obliquely upwards ; the posterior extremity of the maxillar bone 

 corresponds to a vertical line drawn between the nostrils and the anterior rim 

 of the orbit. The dorsal fin is rather elevated, superiorly rounded off ; its an- 

 terior margin is equidistant between the apex of the snout and the last scales 

 at the base of the caudal fin. The origin of the ventral fins takes place some- 

 what anteriorly to the dorsal. The anal fin is deeper than long. The ventrals 

 are broader and shorter than the pectorals. The scales are larger than those 

 of the shiner (Luxilus americanus) and the lateral line, though defiexed, is much 

 less so than in the fish just alluded to. The color is uniformly silvery ; greyish 

 olive along the dorsal region, and of a metallic reflect over the rest of the body 

 and sides of the head. The fins are unicolor, except the dorsal which exhibits 

 a black spot at its posterior margin. 



The species referred to in this paragraph resembles C. whipplii most, with 

 this chief difference, that the dorsal fin is less elevated, and the ventral fins 

 situated somewhat more anteriorly. The minor differences will suggest them- 

 selves upon the comparison of their respective diagnosis. We think that the 

 name of C. analostana may, with great propriety, be bestowed upon it. 



VIII. Our friend, Townend Glover, has just brought us from Palatka, East 

 Florida, a Cyprinodont, of the genus Fundulus. The specimen is unique, and 

 belongs to the male sex. Compared to F. grandis, of which it has the length, 

 the body is more slender, and subfusiform in general appearance. The great- 

 est depth, taken at the origin of the ventral fins, is equal to the length of the 

 head, which enters four times and one third in the total length. The scales 

 which cover the upper surface of the head and the opercular apparatus, are of 

 moderate development. The head is subpyramidal, the snout tapering, and 

 the mouth rather small. The eye is subcircular, of medium size ; its diameter 

 entering about four times and a half in the length of the side of the head. The 

 dorsal fin is longer than high ; it is higher posteriorly than anteriorly, and its 

 origin is nearer the apex of the snout than the extremity of the caudal fin. 

 The latter is subtruncated or subconvex, and constitutes nearly the sixth of 

 the total length. The anal is deeper than its base is long, subtriangular to- 

 wards its extremity which projects further back than the dorsal. The ventrals 

 are broad and short, not extending quite to the vent, which is situated near 

 the anterior margin of the anal fin. The pectoral fins are likewise broad and 

 short, although much more developed than the ventrals ; their posterior ex- 

 tremity is nearly even with a vertical line drawn at the origin of the latter fins. 

 The rays stand as follows : D 17 ; A 134-1 ; C 5, 1, 8, 7, 1, 5 ; V 6 ; P 17. 

 The scales are much deeper than long, anteriorly truncated and rounded upon 

 the rest of the periphery. Radiating furrows are observed upon their anterior 

 section only. The ground color is yellowish brown, quite dark along the dor- 

 sal region, spotted with black ; whitish and unicolor beneath. The spots cor- 

 responding to the scales, upon the line of their intersection. The dorsal and 

 caudal fins are likewise spotted, and assume a reticulated appearance. The 

 anal and the ventrals being yellowish and unicolor, the edge of the anal alone 

 is blackish, whilst the pectorals are greyish olive. 



1859.] 



