2686 Bulletin 47, United States National Museum. 



Citharichthys cayennensis, BLEEKEB, Comptes Rendus Acad. Sci. Amsterd., xin, 1862, 6, 



Cayenne; name only. 

 Citharichthys guatemalensis, BLEEKEE, Neder. Tydschr. Dierk. 1864, 73, Guatemala; 



GUNTHER, Fish.Centr. Amer., 472, 1869. 

 Hemirhombus fuscus, POEY, Synopsis, 406, 1868, Havana; POET, Enumeratio, 138, 1875. 



3059. CITHARICHTHYS GILBERTI, Jenkins & Evermann. 



Head 3 to 3f ; depth of head 4; depth of body 1-fr to 2. D. 77 to 82; 

 A. 57 to 61 ; scales 18-40 to 46-19. Body comparatively broad, formed as in 

 C. spilopteruft, the two profiles about equally arched ; snout slightly longer 

 than longest diameter of eye, and without a distinct spine. Eyes on left 

 side, equal in size, small, 5 to 5| in head; interorbital space narrow, If in 

 eye, low, slightly grooved, and scaled on posterior portion only. Maxillary 

 2 in head, reaching barely to posterior border of eye; upper jaw project- 

 ing. Teeth small, in a single series; gill rakers 4 -J- 13, short and slender, 

 not longer than pupil, with a rather broad base, narrowing to a slender 

 stalk. Dorsal fin beginning in front of upper eye, the first 3 rays grow- 

 ing from the blind side, the distance of origin from snout 7 in head ; fin 

 rays all simple, 2 fa in head; pectorals nearly equal, the one on colored 

 side being slightly longer, l-^- in head; rays on colored side 9; on blind 

 side 8; ventrals 2-, a - in head; caudal rounded, caudal peduncle short, 

 its depth 8 in the body, equaling height of anal; scales large, ciliated, 

 pretty uniform, those toward head and margins of disk becoming smaller; 

 lateral line gradually descending along the course of about 16 scales, from 

 which point it is straight. Color light brown, with about 15 irregular 

 dark blotches of various sizes, the largest being a pair on the latter third 

 of the disk, 1 on each side of lateral line, as great in diameter as length 

 of ventral fin. Specimens from fresh waters (C. sumichrasti) are much 

 darker in color ; gray, everywhere closely peppered with dark specks ; 

 pectoral and caudal mottled. Pacific coast of tropical America; very 

 abundant in sandy bays from Guaymas to Panama, ascending all the 

 streams. This species very closely resembles C. spilopterus, representing 

 the latter on the Pacific coast, and it has been frequently recorded under 

 the name C. spilopterus. C. gilberti differs mainly in the shorter gill rakers 

 and in the slightly larger scales. Fresh-water specimens (as the type of 

 C. sumicJtrasli from Rio Zanatenco, Chiapas, and numerous examples col- 

 lected by us in Rio Presidio, near Mazatlan) differ considerably in color, 

 being much darker, but there is no other difference. ("This species is 

 dedicated to Prof. Charles H. Gilbert, whose collection and notes on fishes 

 from Mazatlan, containing undescribed species, this among them, were 

 destroyed by fire in 1883.") 



Citharichthys gilberti, JENKINS &. EVERMANN, Proc. U. S. Nat. Mas. 1888, 157, Guaymas, 

 Mexico (Type, No. 39627. Coll. Jenkins & Evermann) ; JORDAN, Proc. Cal. Ac. Sci. 

 1895, 503. 

 Citharichthys sumichrasti, JORDAN & Goss, Review Flounders and Soles, 276, 1889, Rio 



Zanatenco, Chiapas. (Coll. Prof. Francis E. Suhiichrast. Type, 25299, M. C. Z.) 

 Citharichthys spilopterus, GUNTHER, Fish. Centr. Amer., 471, pi. 80, fig. 2, 1869; JORDAN 

 &. GILBERT, Proc. U. S. Nat. Mus. 1882, 382; JORDAN & GILBERT, Proc. TJ. S. Nat. Mus. 

 1882, 630; JORDAN &. GILBERT, Bull. U. S. Fish Comm. 1882, 108-111; not of GUN- 

 THER, 1862. 



