1908.] NATURAL SCIENCES OF PHILADELPHIA. 529 



Length If inches (caudal nearly absent). 



No. 5,320, A. N. S. P., cotype of C. margarita Cope. A tributary 

 of the Conestoga, near Lancaster (Cope). 



Also No. 5,321, same data. Though this example is larger it is 

 broken in pieces and mostly macerated. As it agrees in having the 

 last few tubes in the scales of the 1. 1. discontinued before the caudal 

 base it was probably largely the basis of the original description. 



I only have the above material of Cope. He says it is bright crimson 

 below during midsummer and that it was found in a stream inhabited 

 by Rhinichthys and Semotilus. It has not yet been taken out of the 

 Susquehanna basin in our limits. 

 Abrainis crysoleucas (Mitchill). 



Head 3f-to4f ; depth 2^ to 4^; D. iii, 7, i, rarely iii, 6, i or iii, 8, i, 

 once abnormally iii, 7-4 ; A. usually iii, 12, i or iii, 13, i, occasionally 

 iii, 14, I, rarely iii, 10, i or 11, i, or iii, 15, i, once abnormally iii, 

 8-2; scales usually 40 to 45, mostly 41 to 43, often 38, 39 or 46, seldom 

 47, rarely 48 or 50 + usually 2 or 3, rarely 1 or 4; usually 11 scales, 

 often 10, frequently 12, rarely 9 or 13, above 1. 1.; usually 4 scales, 

 frequently 5, rarely 3, below 1. 1.; usually 15 scales, frequently 14 or 

 16, rarely 17, transversely from dorsal origin, in young; usually 23, 

 frequently 21 to 25, often 20, 27 or 28, seldom 29, and rarely 16, 17, 

 18, 19 or 30, predorsal scales; snout 3|- to 4^ in head; eye 2| to 4J; 

 maxillary 3 to 4f ; interorbital 2\ to' 3; teeth 5-5, occasionally 5-4, 

 rarely 4-5 or 7-5 or 6-5 or 5-5, 2 or 1, 4-4, 2, Body well compressed, 

 postventral trenchant. Head compressed, upper profile slightly 

 concave. Snout broadly convex, length + its width. Eye circular. 

 Mouth small, obhque, mandible scarcely protruding. Maxillary not 

 quite to eye. Rakers about 5 + 11 firm compressed points. Scales 

 narrowly imbricated. L. 1. greatly decurved, complete in adult, incom- 

 plete in young. Dorsal origin midway between hind eye margin and 

 caudal base. Anal trifle behind dorsal base. Caudal widely forked, 

 lobes pointed. Pectoral |- to ventral, latter inserted well before dorsal, 

 fin f to anal. Color bluish-olive above, whitish below. Sides often 

 with bright deep bluish or golden reflections. Dorsal and caudal like 

 back, lower fins yellowish- vermilion in spring males. Iris silvery, 

 liength If to 5^ inches. Very many examples: from the Delaware 

 R. basin at Kennett Square, Ring's Run and Willistown Barrens 

 (Chester Co.) ; Chadd's Ford, Hunter's Run, Collingdale (Delaware Co.); 

 Holmesburg, Bustleton (Philadelphia Co.); Cornwells, Hulmeville, 

 near Langhorne, Neshaminy Falls, Bristol, Emilie, Tullytown, Scott's 

 Creek, Yardley (Bucks Co.); Hatboro (Montgomery Co.); Dingman's 



