298 



SCI^NID^. 



Prreoperculmn rounded, with distinct spinous teeth posteriorly and 

 inferiorly ; supraseapula and coracoid entire. The dorsal spines 

 strong, the first half as thick as the second of the anal. Caudalis 

 irregularly truncated ; the second anal spine strong, one- third shorter 

 than the first ray. Pectoral pointed, longer than the ventral. Colo- 

 ration uniform. 



Fresh waters of the United States. 



a. Adult : skin. Ohio Canal, near Portsmouth, United States. 



From Dr. ParncU's Collection. 

 I>. Adult: skin. Pontchartrain Lake. From Dr. Parnell's Collection. 



4. Corvina richardsonii. 



Cur. ^ Val. V. p. 100 ; Richarch. Faun. Bor. Amor. Fishes, p. 64. pi. 77; 

 Dekay, Neio York Fauna, Fishes, p. 76. pi. 20. f. 55 (bad copy). 



D. 9 I ^. A. J. L. lat. 53-54. L. transv. ^. 



The curve from the snout to the dorsal fin is quadrantal and 

 abrupt, the head and shoulders being very prominent. The height 

 of the body is 2| in the total length, the length of the head 31. The 

 jaws are equal in front, and the snout is twice as long as the dia- 

 meter of the eye. The upper maxiUary with an outer row of larger 

 teeth. The whole free edge of the praeoperculum, that of the inter- 

 operculiun and of the suboperculum anteriorly, finely denticulated. 

 The pectorals pointed, and considerably longer than the ventrals. 

 There is no first short anal sjiine (?) ; the only one present is strong, 

 and one-third shorter than the first ray. Caudalis truncated. 

 Greenish-grey, with darker bands across the back. (Bich.) 



Lake Huron. 



5. Corvina satumus. 

 Amblodon satm-nus, Girard in U. S. Pacif. li. M. Exped. Fishes, p. 98. 

 D.IOJ^. A.f 



The height of the body is one-third of the total length, the length 

 of the head one-foiu'th. Snout thick and rounded. The pectorals 

 do not reach so far backwards as the ventrals, which do not extend 

 to the vent ; caudal fin trimcated ; the second anal spine veiy stout, 

 and nearly as long as the second soft ray. Purplish-brown, each 

 scale with a darker centre ; an opercular patch ; fins rather dark. 

 (6?iV.) 



San Diego (California). 



* Cuvier as well as Richardson state 18 soft rays for the soft dorsal fin, a num- 

 ber quite unusual in these fishes. In fact, in the only specimen known, the fin is 

 prolonged into a low membrane, in wliich Richardson found imbedded " eleven 

 obtuse cartilages or rudimentary rays ; they have twelve interspinous bones." 

 I think this to be a sufficient proof of the abnormal condition of the fin in that 

 specimen. 



