115 

 BOLEOSMA, UeKay. 



B. olmstedi, 



Tessellated Darter. 



Body cylindrical, tapering, covered with rough scales, 

 which are moderately large for the size of the fish. Head 

 small; nape smooth, and depressed, as if strangulated. Eyes 

 large, contiguous. The pointed pectorals and the small 

 ventrals close together. The caudal fin, which is a powerful 

 instrument, is even. Olive brown, with from five to seven 

 ohlong, squarish, black spots on the back along each side of 

 the dorsal fin. Seven to nine similar spots along the lateral 

 line; a shorty vertical, black line from the eye obliquely for- 

 ward, and a similar black dash from the eye to the nose; nar- 

 row bars on the rays. Length, 2 to 3 inches. 



Fin-rays:— D. 9. 14; P. 13; V. 1. 5; A. 10; C. 17. 



Etlieostoma olmstedi, Storer, Synopsis, ]). — 



Boleosoma olmstedi, xVgass^ Lake Sup. p. 299. 



B. tessellatum, DeKay, New York Fauna, Fish, p. 20, pi. 

 20, fig. 57. 



Estrella atromacidata, Girard, Proc. Philad. Acad. 1859, 

 p. 05. 



This beautiful and graceful little fish inhabits the stony 

 parts of our shallower streams. It is fond of settling on the 

 flat rocks where the water is shallow, and darts with such 

 rapid impulse as scarcely to be traceable by the eye. Being 

 of such small size it is not used for food, but is preyed upon 

 by the larger carnivorous fishes, which frequent similar 

 places. 



Acad. Coll. 



XXXIV— LOBOTIDJE. 



LOBOTES, Ciiv. 



L. surinamensis, 



Black Triple-tail, Black Perch. 



Form elliptical, elevated^ compressed, a little thicker on the 

 belly than along the margin of the back. Head short and 

 compressed; snout rounded; profile incurved. When first 

 taken from the water, this fish is light silver-grey, but it be- 

 comes soon darker, and finally almost black above; lower 

 jaw, and cheeks near the eyes, are tinted with yellow, and a 



