1904.] NATURAL SCIENCES OF PHILADELPHIA. 247 



-articulated which is longest. Anal inserted behind base of dorsal, first 

 articulated ray longest. Caudal forked, lobes pointed. Pectoral 

 broad, falling a little short of ventral. Ventral inserted before origin 

 of dorsal and reaching anus which is close in front of anal. 



Color when fresh in alcohol dull olive-brown above, below dull white, 

 and side with a broad diffuse grayish band. A band a little wider 

 than pupil composed of dusky dots extends from snout through 

 eye, along side to middle of base of caudal, where it is inten- 

 sified. It is also continued out to margin of caudal, as median 

 rays are grayish-dusky. Top of head brownish, and a median brownish- 

 dusky streak on back enclosing dorsal fin and continued to caudal. 

 Body everyw'here with more or less silvery. Fins red, deepest basally. 

 Dorsal, caudal and pectoral with dilute olivaceous-gray on outer por- 

 tions. Mandible reddish. Iris silvery, except horizontal median 

 dark cross-bar. Peritoneum dusky-gray 



Length 3^ inches. 



Type No. 24,514, A. N. S. P. Rogers, White river basin, Arkansas. 

 Collection Dr. H. A. Pilsbry. Also six co-types with same data. 

 After being in alcohol some time the colors have faded. The longi- 

 tudinal dusky band is, however, still present. 



This species is very closely related to Notropis luciodus (Cope), differ- 

 ing apparently in coloration and slightly more slender body. 



(Named for my friend Dr. Henry A. Pilsbry, well known among 

 leading conchologists.) 



Subgenus NOTROPIS Rafinesque. 

 Notropis socius (Girard). 



Del Rio, Texas. 



Notropis notemigonoides Evermann. 

 Hartford, Arkansas. 



Phenacobius scopifer (Cope). 



Color when fresh in alcohol olivaceous above, whitish below. Scales 

 on back edged with dusky-olive. Lower surface with silvery reflec- 

 tions. Side of head somewhat brassy with pale dusky dots. A broad 

 dusky-slate bar extends from eye to middle of base of caudal, dividing 

 upper and lower colors of body. Top of head dark brownish-olive with 

 a median streak extending to dorsal and continued behind it to caudal. 

 A black spot at base of caudal. Fins and lower surface of head with 

 dilute red, dorsal, caudal and pectoral deepest. Limestone Gap, 

 Indian Territory. 



