84 PROCEEDINGS OP THE ACADEMY OP 



the preceding species in the pharyngeal teeth, (Pomotis rounded, molar-like ; 

 Ichthelis acute, canine, ace. to Holbrook,) they may be distinguished by the 

 anal radii mac ulatus 91, incisor 101, and by the upper posterior process 



of the operculum having a distinct serrate border in the former, in the latter 

 gradually losing its bony consistence ; there are also permanent marks of dis- 

 tinction in the coloration. 



Chaenobryttus* melanops. Ichthelis melanops Raf. Ichth. ohiensis, p. 

 28. Not Calliurus melanops Gir., (Chaenobryttus Gill.) U. S. Pac. R. 

 R. x. p. 11. 



Chaenobryttusf g u 1 s u s. Centrarchus C. V. Calliurus Ag. 



I am indebted to Prof. Gill, of Washington, for the identification of this and 

 some other species of Centrarchine genera. 



Ambloplites rupestris Raf. Gill, Proc. A. N. S., 1860, p. 20. Centrarchus 

 aeneus Auct. 

 302, Algoma, St. Clair Co. ; Long Lake ; Flint River. 



Hyperistius hexacanthus Gill, Sillim. Journ., 37, p. 97,1864. Cuv. 

 Val. nee Centrarchus hexacanthus Kirtl. 

 Saginaw Bay, No. 238. 



BATRACHIA. 



Gradientia. 

 Necturus maculatus Bd. 

 Amblystoma 1 u r i d u m Bd. 

 Amblystoma fuscum Hallow. 

 Amblystoma punctatum Bd. 

 Amblystoma j e ffe rs oni anum Bd. 

 Amblystoma laterale Hallow. 

 Notophthalmus m i n i a t u s Bd. 

 Notophthalmus viridescens Baird. 



SALIENTIA. 



Chorophilus triseriatus Wied. 

 Acris crepitans Bd. 

 Hyla pickeringii Lee. 

 Hyla versicolor Lee. 

 Rana s e p t e n t r i o n a 1 i s Bd. 



* Vid. Gill, in Sillim. Journ., 1864. 37 p. 94. 



} An allied species was contained in a fine collection of fishes made in Minnesota by J. H. Slack, 

 M. D., and presented to the Academy by him. It may be thus distinguished : 



Bryttus in i u e o p a s sp. nov. End of maxillary opposite posterior margin of pupil ; eye If to 

 twice in frontal breadth, five and a half to six times from end of muzzle to upper posterior bor- 

 der of opercular bone. Greatest depth 2 l to 2% times in length to base of caudal. Length of 

 head to upper border suboperculnm a little over three times in length to base of <-audal. Opercu- 

 lar flap a mere border above, little prolonged, but wider opposite the superior angle ot subopercu- 

 lum. Spinous rays of dorsal very short; angles of caudal slightly rounded, the emargination 

 shallow, its length entering b}i in the total. Anal not reaching caudal, and prolonged beyond 

 second dorsal. The ventrals originate a little anterior to the first dorsal, and do not reach the anus ; 

 are two-thirds their length from anal ; pectorals not extending beyond them. Preopercular angle 

 finely denticulate. Scales JL 48 ; ten series on the cheek below orbit. Rays, D. X 11 ; C. +17 X ; 



A III 9; V. 15; P. 12. 



Color in alcohol light-reddish, shaded above with brown, below with yellow ; a black spot at 

 posterior base of second dorsal, the fin otherwise immaculate, sometimes dark shaded. Anal 

 shaded dusky, bordered with white; ventrals dusky. Opercular spot large, oval, bordered with 

 light narrowly above, more broadly inferiorly. No stripes on the head. 



Specimens obtained at Minneopa, Minnesota. 



[May, 



