524 PROCEEDINGS OF THE ACADEMY OF [DcC, 



Semotilus buUaris (Rafinesque). 



Squalius hyalope Cope, Proc. Acad. Nat. Sci. Phila., 1S64, p. 280. Cones- 

 toga Creek, Lancaster Co. 



Head 3f ; depth 4^; D. iii, 7, i; A. iii, 7, i; scales 44 + 3; 7 scales 

 above 1. 1.; 6 scales below 1. 1.; 20 predorsal scales; snout 83- in head; 

 €ye Sf; maxillary 3; interorbital 2|; pectoral 1|; ventral If; least 

 depth caudal peduncle 2^; teeth 2, 5-4, 2. Body little elongate, 

 compressed. Head large, rather conic, compressed. Snout convex, 

 length about I its width, slightly protruding. Eye little ellipsoid, high, 

 trifle anterior. Maxillary to eye. No barbel. Interorbital broad, nearly 

 flat. Rakers 3 + 5 short weak obsolete denticles. Scales striate, pre- 

 dorsal but little smaller. L. 1. complete, slightly decurved. Dorsal 

 inserted nearer caudal base than snout tip. Anal inserted about mid- 

 way between pectoral tip and caudal base. Pectoral about f to ventral, 

 latter inserted about opposite dorsal origin, reaches vent close before 

 anal. Color in alcohol dull brownish, sides and below paler to whitish 

 with silvery traces. Iris brassy. Length 3^ inches. No. 4,882, A. N. 

 S. P., cotype (type) of *S. hyalope Cope. Conestoga Creek, Lancaster Co. 

 (Stauffer). From Cope. Nos. 4,883 to 4,886, same data. 



Head 3^ to 4^^; depth 3f to 5; D. iii, 7, i; A. iii, 7, i; scales 40 to 

 49, usually 41 to 47 + 2 or 3; usually 8, occasionally 7, seldom 9, 

 scales above 1. 1.; usually 6 scales, frequently 5, rarely 4 or 7, below 

 1. 1.; usually 21 predorsal scales, frequently 20 or 22, often 19 or 23, 

 seldom 24, and rarely 18 or 25; snout 2f to 3| in head; eye 2f to 6^; 

 maxillary 2^ to 3^; teeth 2, 5-4, 2, occasionally 2, 4-4, 2, rarely 2, 

 5-5, 2 or 2, 5-3, 2 or 1, 5-4, 2. Body robust, compressed. Head 

 compressed, convex. Snout convex, about broad as long. Eye round; 

 high. Mouth large, nearly horizontal. Mandible included. Jaws 

 heavy. Maxillary nearly to eye, with short barbel above near end, 

 latter absent in most young. Rakers 3 + 4 short weak denticles. 

 Scales large, well exposed. Dorsal origin little nearer caudal base 

 than snout tip. Anal behind dorsal base. Caudal forked. Pectoral 

 about I to ventral, latter inserted little before dorsal, reaches about 

 I to anal. Color largely silvery-white below, bluish and olive on back. 

 Spring males brilliant vermilion on sides of head and body, lower 

 fins and dorsal base, iris orange and front of head tuberculate. Length 

 If to 15 inches. A very large series of all ages: from the Delaware 

 R. basin at Kennett Square, Willistown Barrens, Crum Creek 2 miles 

 east of White Horse, Ring's Run (Chester Co.); Markam, near Wawa, 

 Collar Brook (Delaware Co.); Holmesburg, Torresdale (Philadelphia 

 Co.); Cornwells, near Langhorne (Bucks Co.); Delaware Water Gap 



