ADDENDA 31. CYPRINID.E KHINICHTHYS. 885 



are recognized. These are distinguished by the characters given in 

 the following analytical key: 



. Mouth inferior, snout produced beyond it. 



6. First dorsal ray midway between end of snout and base of caudal. 



c. Lateral line 60-64 ; 1. trails. 10 + 1 + 9 nasittii*. 



cc. Lateral line 70 cataracts. 



66. First dorsal ray midway between anterior nostril and. base of caudal. 



d. Lat. 1. 75-80; 1. trans. 10 + 1 + 10 marmoratus. 



del. Lat. 1. 70; 1. trans. 10 + 1 + 10 luteus. 



666. First dorsal ray midway between front of mouth and base of caudal. 



e. Lat. 1. 70 ; 1. trans. 11 + 1 + 10 ; snout narrow ocelln. 



ee. Lat. 1.80; 1. trans. 12 + 1 + 12 dulcis. 



eee. Lat. 1. 70-72; 1; trans. 12 + 1 + 13 transmontanun. 



6666. First dorsal midway between middle of eye and base of caudal. 



/. L. trans. 25 maxillosus. 



aa. Mouth subiuferior, snout not produced. 



g. First dorsal midway between nostril and base of caudal; lat. 1. 80; 



1. trans. 14 + 1 + 10 badiiix. 



gy. First dorsal midway from eye. 



h. Lat. 1.58-60; 1. trans. 9 + 1 +7 sinuix. 



hh. Lat. 1. 70; 1. trans. 11 + 1 + 8 oMusus. 



hhh. Lat. 1. 63; 1. trans. 12 + 1 + 9 atronasus. 



i. Stout, black baud obsolete lunatux. 



aaa. Mouth anterior. 



fc. First dorsal midway from front of eye. 



I. Lat. 1. 69-76 ; 1. trans. 11 + 1 + 10 meleagris. 



II. Lat. 1. 64 ; 1. trans. 9 + 1 + 7 an'iiatus. 



Most of these species we are unable to recognize. They seem to us 

 to be merely local varieties, or even individual variations, of the two or 

 three most widely-distributed types in this genus. 



The following may perhaps be inserted: 



V 

 Page 207. After R. transmontanus add: 



316 (6). R. dulcis (Grd.) Jor. & Copel. 



Eeddish brown, clouded with darker; lateral band very faint; a 

 dark caudal spot. Snout blunt, projecting beyond mouth, which is 

 small and inferior. Barbel small, sometimes absent. Ventrals reach- 

 ing vent. Scales small. Head*tJ. D. 9; A. 8; scales 12-80-12. Platte 

 Valley. (Garman.) 



(Arr/yrcus diilcis Grd. Proc. Acad. Nat. Sci. Phila. 1856, Sweetwater Eiver; Gar- 

 man, Science Observer, 1881, 59, Cheyenne: Rltiniclithys ocdla Garman, 1. c. 59, from 

 N. E. Wyoming and Montana, has the snout narrow, the barbel conspicuous, the 

 scales 11-70-10: EhinicJitJn/s luteus Garman, Bull. Mus. Comp. Zoo'l. 1881, 87, and 

 Science Observer, 1881, 59, from Ogden, Utah, has the snout long, more than twice 

 eye, the barbel small, and the scales 10-70-10: Bhinichthys marmoratus Ag. ; Garman, 

 1. c. 58, from Sault Ste. Marie, has the scales 10-78-10, and is possibly distinct from 

 R. cataractce.) 



