92 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



The examples sent by Capt. Bendire show the following characters : 

 Greatest height of body slightly exceeds length of head, 4^ in length to 

 end of scales ; upper jaw as in the above ; eye 4^ in head ; snout 3^ in 

 head ; pectoral 5, ventral in length to end of scales ; longest dorsal 

 and anal rays as in last; ventral reaches to anal; 1). 9; A. 7 ; V. 7; 

 scales 12 to 13-55 to 30-10 to 12 ; length 3 to 3;^ inches ; teeth 2, 4-4, 2. 



These specimens show consklerable variation in the number of scales 

 in the lateral line, and there is constantly one more dorsal ray than in 

 the types of A. nuMla; they are, however, certainly not si)ecitically dis- 

 tinct from Girard's form. 



I have exai]iined a fish collected by Prof Jordan in Utah Lake and 

 correctly identified by him with Apocope vulnerata Cope. While the 

 teeth of one side of the si)ecimen identified by Prof. Jordan are 1, 4, as 

 he states, on the other side of the same fish I find 2, 4. If this condi- 

 tion occurs frequently the margin of separation between A. vulnerata and 

 A. nubila will become uncomfortably small, as there will be little left 

 besides the slightly greater number of scales. 



Description of a female specimen of A. nubila^ number 24105, collected 

 by Capt. Bendire at Walla Walla. 



D. ii, 7|; A. ii, 6|; V. 8; P. 15; scales 13-53-10; teeth hooked, 

 slightly grooved, 1, 4-4, 1. 



Barbels minute- The end of the maxilla reaches the vertical through 

 the anterior margin of the nostril ; snout contained 3 times, eye 5 times 

 in length of head. Eye H ti-nes in width of interorbital area. Length 

 of head nearly 4 times in total length caudal excluded, 4.^ times caudal 

 included. Greatest depth 5 times. Longest dorsal and anal rays equal 

 and contained 5.^ times in total length without caudal ; pectoral con- 

 tained 5 times in the same length. Ventral equal to length of head 

 without postorbital part. The origin of the dorsal is a little behind 

 that of the ventrals, about midway between the tip of the snout and the 

 end of the middle caudal rays. Length 81 millimeters. 



Color of the alcoholic specimen grayish olive. There is a faint indi- 

 cation of a dark stripe oa the nose. 



8. Mylochilus caurinus (Rich.) Giranl. 



30299 (34,;) 9 1 specimen, Mill Creek, trib. of Walla Walla R., Apr. 26, 1881. 



"Chub, taken Apr. 26, 1881, in Mill Creek, tributary of Walla Walla 

 Eiver, Washington Terr'y." 



"Above bluish brown; sides paler. A carmine red stripe along the 

 Sides. Belly silvery white. Xose steel blue. Stripe below the eye 

 brick red. Called Bed Horse occasionally." 



Eye equal to preorbital, 1^ in snout, 5 in head. Maxilla reacning 

 vertical through hind margin of posterior nostril. Head 1^^ in depth, 

 4| in length to end of scales. Depth 4:V in length to end of scales. 

 Pectoral eqnals longest dorsal ray, 3 in distance from snout to dorsal. 

 Ventral is under 3rd ray of dorsal, does not reach vent, eqnals head 



