Jordan and Evermann. — Fishes of North America. 1047 



River; very variable; inhabits rivers rather than brooks. (Named for 

 its discoverer, Dr. George C. Shumard, surgeon of the U. S, Pacific R. R. 

 Survey.) 



UiMlroplenis. ihumanli, Gi\iAiu\ Proc. Ac. Niit. Sci. Phila., 1859, 100, Arkansas River, near 



Fort Smith, Arkansas. 

 Etheosluiiiawritjldi, McCoRMirK, Bull. Oberlin College Lab., No. 2, 30, 1891, near Oberlin 



Lorain County, Ohio; specimen with a frenum to upper jaw. (Coll-. L. M. McCoruiick.) 

 ElheosloiDa schudianli, Vaillant, HechercUes, 73, 1873. 

 Tmosloma shntiiardi, Jordan & Gilbkiit, Synopsis, 498, 1883. 

 lioleosomu shumardi, Boulenger, Cat., i, 92. 



469. ULOCENTRA, Jordan. 



Uhcentra, Jordan, Man. Vort. E. U. S., Ed. 2, 223, 1878, {atripinnis). 



Body moderately elongate, little compressed. Head short, thick, with 

 tumid cheeks. Mouth small, horizontal, the lower jaw included. Pre- 

 maxillaries protractile, little movable, sometimes with a narrow, mesial 

 frenum in some species ; maxillary movable, not joined to the preorbital 

 except at its root ; vomerine teeth present, small. Gill membranes nar- 

 rowly or broadly connected. Scales moderate; the belly scaled like the 

 sides, with no ventral plates. Lateral line complete or incomplete. 

 First dorsal with about 12 spines; anal smaller than second dorsal, with 

 2 well-developed spines, the first the longer. Veutrals not widely sepa- 

 rated. Vertebrae {simoUra) 15 + 23 = 38. Skull not very narrow ante- 

 riorly ; parietal region rather depressed, not strongly convex transversely- 

 Frontal region much broader than in DipUtiion. Supraoccipital crest 

 small. Small species, often highly colored, intermediate between Bole- 

 osonta and Dqylesioii. (oi''/«r, complete ; Kft-rpof, spine; the chief character 

 separating the genus from Boleosoma.) 



a. Gill membranes narrowly connected; cheeks and opercles usually scaly; body slender; scales 

 large. 

 b. Lateral line incomplete; coloration olivaceous, tessellated with darker; scales about 46. 



stigm.>:a, 1437. 

 t;>. Lateral line complete; scales about 55; pectorals as long as head. gilberti, 1438. 



aa. Gill membranes broadly united. 



'■. Lateral line complete or ne.arly so. 

 <?. Opercles naked or nearly so. 



e. Spinous dorsal longer than soft dorsal; pectorals as long as head; sides 



with green spots; scales about 47. verecunda, 1439. 



ee. Spinous dorsal not longer than soft; pectoral longer than head; sides 



much variegated; scales about 52. histrio, 1440. 



dd. Opercles .scaled; pectoral longer than head; snout blunt; scales about 50; 



sides with dark green quadrate blotches. simoteua, 1441. 



ec. Lateral line incomplete; cheeks and opercles naked; anal rays II, 5; red, with 



dark markings. phlox, 1442. 



1437. ILOCKXTRA STKiM.EA (Jordan). 



(Speck.) 



Head 4i; depth o. D. X to XIII-12; A. II, 7; scales 5-46 to 55-10, 

 pores 35, more or less. Body slender, formed as in Boleosoma. Head nar- 

 row and thin, the snout somewhat pointed, obliquely truncate in profile. 



