298 SCIiENID^. 



Pneoperculum rounded, with distinct spinous teeth posteriorly and 

 Lnferiorly ; suprascapula and coracoid entire. The doreal spines 

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

 irregularly truncated ; the secoiid anal spine strong, one-tlurd shorter 

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

 ration imiform. 



Fresh waters of the United States. 



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



From Dr. Parncll's Collection. 



b. Adult: skin. Pontchartrain Lake. From Dr. PameU's Collection. 



4. Corvina richardsonii 



Cur. ^ Vul. V. p. 100 ; Ilic/utrds. Faun. Bar. ^bncr, Finhcs, p. G4. pi. 77; 

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



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



The curve from the snout to the dorsal fin is qiuidrantal 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 3i. The 

 jaws are c(pial in front, and the snout is twice as long as the- dia- 

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

 teeth. The whole free edge of the proeoi)ercuhmi, that of the inter- 

 operculum and of the suboperculum anteriorly, finely denticulated. 

 The pectorals pointed, and considerably longer than the vcntrals. 

 There is no fii'st short anal spine (?) ; the only one present is strong, 

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

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



Lake Huron. 



5. Corvina saturnus. 

 Amblodon satm-nus, Girard in U. S. Pacif. It. B. Exped. Fislies, p. 98. 

 D.10|± A.f 



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

 of the head one-fourth. Snout thick and roimded. The pectorals 

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

 to the vent ; caudal fin tnmcated ; the second anal spine very stout, 

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

 scale ^vitlL a dark(^r centre ; an opercular patch ; fins rather dark. 

 {Gir.) 



San Diego (CaUfoniia). 



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

 ber quite unusual in these fishes. In faet, in the only specimen known, tlu^ fin is 

 prolonged int<j a low membrane, in which Richardson foimd imbedded " eleven 

 obtuse cartihiges or rudimentary rays ; they have twelve riit^^rspinous bones." 

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

 specimen. 



