554 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. [1S85. 



of Gobiidcc have been studied, Gohionellus must be separated from Oo- 

 bins, if at all, ou the characters furnished by the teeth. The body may 

 be short or loug, as illustrated by the species G. occanicus and G. stig- 

 maticus ; th€ head uaked or scaly above, the scales of the lateral Hue 

 mauy or few. The outer lower teeth of G. smaragdus cau hardly be 

 regarded as " setaceous." 



2. Etheostoiua davisoni, n. sp. Subgenus Uloccnira, Jordau. 



Founded ou a single specimen seined in the Yellow River, near Chaf- 

 fin, in Santa Rosa County, Florida. Length to base of caudal fin, If 

 inches. Namedinhouorof Mr. D.M.Davison, one of its collectors. Body 

 elongate, slender, considerably compressed. Head long, narrow, rather 

 pointed, the snout not being rapidly decurved as in other species of 

 Ulocentra and in VaiUantia camura. Depth in length to base of cau- 

 dal 6i. Head in length 4^. Eye in the head 3. Snout about three- 

 fourths the diameter of the eye. Interorbital space narrow. Hori- 

 zontal diameter of the head through the pupils equal to two-thirds the 

 perpendicular diameter at the same point. Mouth large, horizontal, 

 terminal, the maxillary extending back to a perpendicular from the pu- 

 pil ; cleft of the mouth one-fourth the length of the head. Jaws about 

 equal; the premaxillary freely protractile ; the maxillary not adnate 

 to the preorbital. Cheeks and opercles densely scaly ; the opercular 

 spine well developed. Gill-membranes narrowly connected. Vomer- 

 ine teeth apparently present. 



Body covered with scales except on the chest. Scale formula 5-50-7. 

 Lateral line incomplete, pores being developed on about 30 scales. Dor- 

 sals IX-10, well sei)arated. A. II-6, Base of the spinous dorsal in 

 the length of body 4^ ; its height in same distance 7 times. Base of 

 second dorsal in the body 7 times ; its height about the same. Its 

 origin about midway between the snout and the tips of the caudal rays. 

 Anal spines well develoi^ed, the first rather stronger. Base of anal in 

 length of bodj' 8^, its height 7^ times. Pectorals extending back to 

 the eighth dorsal spine, the ventrals falling short of the tips of the 

 pectorals. Body not contracted at the vent as it is in VaiUantia camura. 

 Caudal peduncle compressed, tapering gradually to the caudal fin, its 

 length (from anal) in body, 3f times. Distance from the vent to the 

 base of the caudal fin equal to the distance from the vent to the poste- 

 rior border of the orbit. In V. camura the distance from the vent to 

 <;audal reaches only from the vent to the base of the opercular spine. 



General color olivaceous. Many of the scales, each with a dark 

 blotch, which blotches unite to form zigzag and W-shaped markings, 

 especially above the lateral line. Along the sides there are about 10 

 larger nearly square spots ; of which the largest are on the caudal pe- 

 duncle. Belly and chest under a lens are seen to be thickly siirinkled 

 with black dots. A black streak downward from the eye and another 

 forward to the snout. Fins dusky. Both dorsals with a row of dusky 

 spots lying between the rays. Caudal barred. 



