42, BxoGLOssuir. 187 



side on the upper an well as on the lower jaw, exactly as in the genus 

 Tctraodoiv, their edge being shnrj) and cutting. Tlie dcjr.sul fin has 

 the structure of that of Pimephahx ; tlie insertion of the ventrals is 

 situated under the anterior margin of the dorsal, the caudal being 

 furcated. The scales are large, and the lateral line follows the 

 middle of the flanks ; the istlimus rather wide. The pharyngeals 

 have the same shape and form as in Fimephahs ; the teeth, however, 

 are more slender and concave upon the grinding-surface, giving them 

 the appearance of being bent backwards: they are of the same 

 type, a little more conspicuously hooked, 4 — 4, 

 Texas, 



1. Cochlognathus ornatus. 



Baird i^- Girard,l. c. l8.'J4, p. 158, and U. S. &■ Mex. Bound. Ichthuol. 

 p. 40, pi. 35. figs. 12-17. 



D. 9, A. 6, 



Head forming two-ninths of the entire length, and abruptly 

 rounded off on the snout; mouth proportionately small and terminal, 

 with oblique cleft. Eyes rather above the medium size, their dia- 

 meter being contained four times in the length of the side of the 

 head. licxly much compressed, covered with large scales disposed in 

 twelve longitudinal rows on the line of greatest depth. Lateral lino 

 inflexed downwards upon the abdomen. Anteiior margin of dorsal 

 nearly equidistant between the snout and rudimentary rays of the 

 caudal; anal situated entirely backwards of the dorsal; caudal 

 forked. Insertion of ventrals beneath the anterior margin of dorsal ; 

 tip of pectoral not reaching them. The colours, as preserved in 

 alcohol, present a reddish-brown ground, and a dark lateral band 

 or stripe. The dorsal fin exhibits two elongated dark spots, one 

 anterior and basal, the other posterior and nearer to its tip. The 

 posterior half of the caudal has likewise a darker hue than its ante- 

 rior and Ijasal half, which is of a dull orange, as is also its extreme 

 margin. (Girard.) 



Brownsville ; Texas. 

 • 



42, EXOGLOSSUM, 



Exoglossum, Rajinosquc, Jouvn. Ac. Sc. Nat. Philad. i. p. 419; Cnv. 

 i^- V(d. xvii. p. 480; Agasdz, Amer. Journ. Sc. 8f Arts, 185.'5, xix. 

 p. 215. 



Scales of moderate size, lateral line present and complete. Dorsal 

 fin .'ihort, without sjiinous ray, commencing above the ventrals; anal 

 fin short. Mouth inferior, of moderate width ; the upper jaw is sub- 

 semicircular in its outline, not protractile, provided with a thick 

 lij) overlapping the lower jaw. The mandibles are united by a broad 

 symphysis extending along the entire length of the dentary bones, 

 the symphysial ])ortion being prominent, narrow, tongue-shaped, 

 with a sharpish edge, destitute of a labial covering, the labial fold 

 being develoi)ed towards the angle of the mouth only ; barbels none ; 

 gill-rakers extremely feeble ; pseudobranchiic. The gill-cavity com- 



