Jordan and Evermann. Fishes of North America. 235 



369. LEUCISCUS INTERMEDIUS (Girard). 



Head 3S; depth 4. D. 8; A. 9; scales 15-73-9. Allied to L. nigrescent, 

 but from a different river basin. Body elongate, heavy forward, the 

 caudal peduncle slender. Head long, rather pointed, broad above, 

 depressed over the eye; mouth large, oblique, the jaws equal, the maxil- 

 lary just reaching eye. Fins moderate, the dorsal behind ventrals; pec- 

 torals long, nearly reaching ventrals. Color dusky everywhere, with 

 dark dots, the sides soiled silvery; a plumbeous lateral streak; fins plain. 

 Scales 75 in lateral line, in our specimen from Rio Santa Cruz at Tucson. 

 Gila Basin. Very close to L. purpurem, but that species has apparently 

 larger scales, and belongs to another river basin, (intermedius, interme- 

 diatebetween L. pulcliellus and L. purpureus.) 



Tigoma intermedia, GIRARD, Proc. Ac. Nat. Sci. Phila., 1856, 206, Rio San Pedro of the Gila. 



Coloration silvery with dark dots; scalps 15-73-9. (Type, No. 232. Coll. Clark.) 

 Squaliiis lemmom,* ROSA SMITH, Proc. Cal. Ac. Sci., 1884, 3, Rillito Creek, near Tucson, Ari- 



zona. (Coll. J. G. Lemmon.) 

 &/wuiih intermedius, JOBDAN & GILBERT, Synopsis, 238, 1883. 



370. LEUCISCUS NIGER (Cope). 



Head,3|; depth, 3|; eye rather large, 5 in head. D. 8 ; A, 8 ; lateral 

 line 80.; teeth 2, 4-5, 2, said by Girard to have a developed grinding sur- 

 face, which, however, we are unable to find. Body robust, the back ele- 

 vated anteriorly, the caudal peduncle shortened and not very stout. 

 Occiput depressed. Head large. Mouth large, moderately oblique, the 

 lower jaw included, the maxillary extending to pupil. Fins small, 

 the dorsal well backward. Scales small, posteriorly smaller and more 

 crowded. Lateral line little decurved. Color dusky, the scales with 

 black dots. Rio Gila. A large species, perhaps not distinct from L. 

 intermedius, the scales apparently a little smaller, the differences in form 

 no doubt due to age. (niyer, black.) 

 Gila gibbosn, BAIRD & GIRARD, Proc. Ac. Nat. Sci. Phila., 1854, 28, Rio Santa Cruz, Arizona; 



(the namegrib6oso is twice preoccupied in Leuciscus). (Type, No. 222(2775). (Coll. Clark; 



Heerniiinn.) 

 Tigoma gibbosa, GIRARD, Proc. Ac. Nat. Sci. Phila., 1856, 207, and U. S. Hex. Bound. Surv., 



Ichth., 64, 1859. 

 Gila nigra, COPE, Zoiil. Wheeler's Expl. W. 106th Mer., v, 663, 1875, (187G), Ash Creek and San 



Carlos. Arizona; scales 78 to 87. (Type, No. 16972. Coll. Henshaw.) 

 niger, JORDAN & GILBERT, Synopsis, 239, 1883. 



*The following is the description published by Miss Smith (Mrs. Eigenmann): 

 Squalins lemmom: Head 3% (4%); depth 3<j (4f); length 5% inches; D. 8; A. 8. Body not 

 much compressed, but rather slender; the dorsal and ventral outlines about equally arched. 

 Head subconical, little compressed, nearly as wide as deep, and flat on top; maxillary oblique, 

 reaching frcnt of eye, lower jaw barely included; diameter of eye not quite equal to snout, 1% 

 inch interorbital space, 4% in head. Teeth 2, 5-4, 2, with evident grinding surface on three in 

 the greater row. Pseudobranchise present. Isthmus narrow. Scales68. Lateral line decurved, 

 but not strongly. Scales largest on sides anteriorly; much smaller on dorsal and ventral sur- 

 faces. Scales not very firm, a few rubbed off from each of the four examples studied. Insertion 

 of dorsal fin very slightly behind ventrals, nearer snout than bane of caudal. Pectorals 1% in 

 head; ventrals 2 in head, very nearly reaching vent. Depth of caudal peduncle 2 in its length. 

 Color generally smutty. Top of head, from tip of snout to occiput, evenly bluish black, sharply 

 separating the head from the trunk; a median blackish streak from occiput to base of caudal, 

 paler behind dorsal. A leaden baud about as wide as eye from upper angle of opercle to base of 

 caudal, running higher than the lateral lino except at its posterior fourth, where it is upon the 

 lateral line. Sides of head and body dusky from numerous dark punctulations. Below, plain white 

 from chin to insertion of anal. Fins all dusky. Peritoneum blackish. Described from four 

 specimens (the largest 5 1 // inches long) collected in Arizona by Mr. J. G. Lemmon, for whom 

 the species is named. These specimens have been donated by the collector to the California 

 Academy of Sciences. Mr. Lemmon states that he found these fishes in Rillito Creek, a small 

 stream of the Santa Catalina Mountains, seven miles north of Tucson, Arizona, and that the 

 largest ones caught were about ten inches in length. 



