PEOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 233 



atin!:>-, tlie lowest and largest one turned downward and forward. Lower 

 jaw included, considerably shorter than upper. Snout scarcely project- 

 ing- beyond preinaxillaries. Mouth nearly horizontal; premaxillary 

 nuK'li below the level of the eye; maxillary extending to just beyond 

 middle of eye. Teeth in both jaws in narrow villiform bands, tlie outer 

 teeth in the upper jaw somewhat enlarged; those in the lower jaw all 

 small. Sides and top of head somewhat cavernous, the surface yielding 

 to the touch. Gill-rakers shortish, rather slender, about as long as 

 pupil. Pseudobranchiic large. 



Dorsal fin divided nearly to base, the spines not very high, rather flexi- 

 ble, the longest little more than half length of head; second spine a little 

 stouter than third, and nearly as high. Second dorsal rather low. 

 Second anal spine strong, about half length of head, three-fourths height 

 of the soft rays; distance from front of anal to caudal li| in length of 

 body ; distance from vent to aual a little more than half length of si'cond 

 anal spine. Caudal fin long, double truncate, the middle rays pro- 

 duced, as long as from snout to edge of preopercle; caudal peduncle 

 (from end of anal) li in head; anal,ending in advance of end of dorsal, 

 its first spine in advance of middle of soft dorsal. Ventrals long, the 

 second ray filamentous, reaching vent. Pectorals rather short, as long 

 as caudal. 



Scales large, those on breast not much smaller. Soft parts of vertical 

 fins scaly toward the base. 



Lower ])haryngeals narrow, with small, slender, pointed teeth, those 

 of the series on the inner edge of the bone much enlarged, also very 

 slender. 



Head 3?- in length to base of caudal; greatest depth, 3^. 



D. X-I, 18. A. II, 8. Lat. 1., 44 ; 5 scales in a vertical series from 

 front of dorsal to lateral lines. 



Color light reddish brown, dingy with dark punctnlations. Ground 

 color a light coppery shade, little silvery; each scale with many dark 

 points and a smutty edging; the general hue the same above and below; 

 no distinct markings. Preorbital of a soiled silvery. Fins similarly 

 dusky, the caudal yellowish, the anal almost black. Inside of operclo 

 dusky. 



This species is known to us from one specimen, 7^ inches in length, 

 numbered 28,129 on the iN'ational Museum Register. It was collected 

 at La Union, on the Gulf of Fonseca, in San Salvador, by Lieut H. E. 

 Nichols. 



33. MUGIL BRASILIENSIS Ag. (29.()44.) 



34. aELURICnTHYS PANAMENSIS Gthr. (28,192.) 



Indiana Univeksity, November 5, 1881. 



