Jordan and Ei'ermann. — Fishes of North America. 235 



369. LEUCISCUS INTKKMKIUl S (Giianl). 



Head o"; depth 4. U. 8; A. 9; scales 15-73-9. Allied to L. nigrcscms, 

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

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

 depressed over the eye; month large, obliqne, the jaws e(iual, 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 Kio Santa Cruz at Tucson. 

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

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

 diate — between L. pitlchellns and L. purpureus.) 



Tigoma intermedia, Girard, Proc. Ac. Nat. Sci. Thila., 18.56, 20G, Rio San Pedro of the Gila. 

 Coloration silvery with dark dots; scales 15-73-9. (Typo, No. 23'2. Coll. Clark.) 



Sijnaliuslejmnom* Rosa Smith, Proc. Cal. Ac. Sci., 1884, 3, Rillito Creek, near Tucson, Ari- 

 zona. (Coll. J. G. Lemmou.) 



SqiuUiii-s intei-meditts, Jordan & Gilbert, Synopsis, 238, 1883. 



370. LEUCISCUS NIOER (Cope). 



Head,3|; depth, 3f; 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 tind. 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 pujiil. 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. 

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

 no doubt due to age. (/((V/(t, black.) 



Gill ijihhnsa, Bairii .*i Giraup, Pr'uc. Ac. Nat. Sci. Phila., 18.54, 28, Rio Santa Cruz, Arizona; 



(the name«3ii)(>osa is twice preoccupied in LeucUiem). (Type, No. 222(277.5). (Coll. Clark; 



Hecrniaiin.) 

 Tigoma <jihh<mt, Girard, Proc. Ac. Nat. Sci. Phila., 185G, 207, and U. S. Mox. Bound. Surv., 



Ichth.,Gl, 1853. 

 Gila nigra, Cope, Zoiil. Wheeler's Expl. W. 100th Mer., v, fifiS, 1875, (187G), Ash Creek and San 



Carlos, Arizona; scales 78 to 87. (Type, No. 1C972. Coll. Heushaw.) 

 Sgualais niger, Jortmn & Gilbert, Synopsis, 239, 1883. 



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

 SgiutliKs lemiiiimi: Head W/, {il{^); depth 3^ (-If); length 5y, inches; D. 8; A. 8. Body not 

 much comprcsseil, hut ratlur slender; the dorsal and ventral outlines about equally .irched. 

 Head subconical, little coinpresscd, nearly as wide as deep, and flat on top; maxillary olilicpu;, 

 reaching fn nt of eye, lower jaw barely included; diameter of eye imt (jnite equal to snout, 1}/^ 

 inch iiiterorbital space, 4'.; in head. Teeth 2, 5-4, 2, with evident grinding surface ou three in 

 the greater row. Pseudohranchire present. Isthmus narrow. ScalesGS. IjatiTal linn 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 tlio four examples studied. Insertion 

 t)f dorsal fill very sliglitly boliind ventrals, nearer snout than base of caudal. Pectorals 1% in 

 head; ventrals 2 in bead, very nearly reaching vent. Depth of caudal i)0(luncle2 in its length. 

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

 separating tln^ head from the trunk; a median blackish stre.ak from occiput to base of caudal, 

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

 caudal, running higher than the ladral lino except at its jm.sterior fourth, where it is upon tlia 

 lateral line. Sides of head ami body lUisky from numerous dark piinetnlations. Below, plain white 

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

 specimens (the largest 5i'2 inches long) collected in Arizona by Mr. J. G. I.emmon, for whom 

 the Hpecies is named. These specimens have been donated by the collector to the (\aliforuia 

 Academy of ScienceB. Mr. Lenimon states that he foniiil these fishes in Rillito Creek, a small 

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

 largest ones caught were about ten inches in length. 



