PERCIDA. — LXIII. 3 
From Ind. W. and S. occurs var. elarum (Jordan & Meck). 
Differs from var. pellucidum in having no scales along nuchal region, 
and none on sides anteriorly except the 5 or 6 rows along lateral 
line. Cheeks with few scales. 
From 8. Ill.,S., and W. is found var. vivax (Hay), better scaled 
than var. pellucidum, the region before dorsal being more or less 
closely covered with scales; scales firmer and rougher; a dusky 
bar across base of soft dorsal. 
cc, Anal spines two; anal small. (Ioa1 Jordan & Brayton.) 
323. E. vitreum (Cope). Side of head closely covered with 
large, rough-ctenoid scales; middle and lower part of side with 
rough scales, breast and part of belly naked as is front of back; 
fins low; P. long. ‘Translucent, with small dark spots on back and 
sides; fins plain. Head 44; depth 7. D. VII to IX-11 to 13. 
A. II, 7. Scales 60. L.2. Va. and N.C., common in Neuse R. 
(Lat., glassy.) 
66. Premaxillaries not protractile; dorsal spines 14; anal fin large. (Crys- 
tallaria? Jordan & Gilbert.) 
324, HE. asprellus (Jordan). Eyes very large; mouth moderate ; 
cheeks and opercles well scaled; nape scaly; throat and belly 
naked; fins large; C. lunate; hyaline olive; sides with 10 dark 
quadrate blotches, small and far apart; body sometimes with 4 or 5 
broad dark cross-bands; fins plain; a dusky shade through eye. 
Head 44; depth 7. D. XIV-13. A.1,12. Scales 7-93-X. L.4. 
S. Ind. (Rising Sun; O. P. Jenkins) to Il., Ala., and Ark., in clear 
water, much the largest of the hyaline or “sand” Darters, approach- 
ing the type of E. aspro. (Diminutive of Aspro.) | 
aa. Body less elongate, not hyaline, almost entirely covered with scales. 
e. Premaxillaries protractile. 
J. Anal spine single, obscure; dorsal spines usually 9; anal smaller than 
soft dorsal. 
g. Lateral line complete or very nearly so. (Boleosoma3 DeKay.) 
h. Soft dorsal with 12 to 14 rays. 
i. Cheeks and opercles scaly; D. IX-14. 
325. EB. olmstedi Storer. Body rather slender; fins very high; 
the spines weak; nape and breast usually naked (closely scaled in 
var. atromaculatum Girard, Cayuga L. and S.); olivaceous; sides 
with blotches and zigzag markings; fins speckled; head black in 
males in spring. Head 4; depth 53. A.I,9. Lat.1.50. L. 34. 
Mass. to W. N. Y., S. to Ga., abundant; probably a variety of the 
next. (To Mr. Olmsted who discovered the species in the Conn. 
Valley.) 
aw. Cheeks almost always naked; opercles scaly; breast naked. 
a 
1 ids, arrow. 2 kpvaTtaAdos, crystal. 3 BoAts, dart ; Hua, body. 
