PERCIDA. 
RIE 127 
sides with 9 blackish oblong spots, alternating with smaller ones: 
fins mottled; 1st D. with median dark band. Head 34; depth 
7 D.XV-—-13. A.J, 11. Scales 11-77-15. L. 3. Ohio Valley, 
rare W. (paxpés, large; xedadn, head.) ‘ 
tt. Cheeks naked; opercles sealy above only; nape and breast naked; 
muzzle blunt. 
339. HE. peltatum Stauffer. Body rather stout; mouth moderate, 
maxillary reaching eye; ventral shields large. Olive, the back with 
short cross-bars ; sides with broad brownish shades; a dark blotch 
on neck and opercle; snout and space below eye with the usual 
bars ; fins barred; 1st D. with a black band. Head 4; depth 5. 
ion 2. A. VM, 8. : Seales. 7-p3-9) | b42 Penn. to. Se C., 
KE. of Mts. (EH. nevisense Cope; Alv. crassus Jor. & Brayton.) 
(Lat., having shields.) 
ttt. Cheeks usually with small scales; opercles with larger ones. 
u. Head not very slender, the muzzle moderate, the lower jaw in- 
cluded. 
340. E. aspro (Cope & Jordan). BLack-stipED DARTER. 
Body fusiform, rather elongate ; maxillary reaching just past front 
of eye; breast naked; nape scaly or not. Greenish yellow with 
dark tessellations and marblings above and about 7 large dark 
blotches along side, more or less confluent; fins barred; a small 
spot at base C. Head 4; depth 6. D. XIII to XV,12. A. II, 9. 
Scales 9-65-17. Vert. 42. L.3to 4. W. Penn. to Dakota and 
Ark., abundant, one of the most elegant of the darters. (Aspro, a 
related genus of European Percide, from Lat. asper, rough.) 
uu. Head very slender, with long-acuminate snout; jaws subequal. 
341. BE. phoxocephalum Nelson. Body slender; mouth large, 
maxillary reaching eye; nape scaly ; breast naked. Yellowish 
brown, the lateral spots smaller than in EF. aspro and more numer- 
ous, quadrate in form; a small dark spot at each end of lateral line. 
Head 4; depth 53. D. XIIT-13. A. II.9. Scales 12-68-14. 
Vert. 39. L.4. Ind. to Kans. and Ark., common 8S. W. (qdo€ds, 
tapering ; xepadn, head.) 
gq. Preopercle more or less distinctly serrate, especially in the young; 
gill membranes broadly united. (Serraria1 Gilbert.) 
342. EB. scierum (Swain). Body rather stout; head short, 
bluntish ; mouth small, the lower jaw shorter; maxillary not reach- 
ing eye; cheeks and opercles scaly; breast partly scaled; scales of 
median line of belly slightly enlarged, probably deciduous; fins very 
large. Yellowish olive, everywhere vaguely blotched with black, 
especially along sides; g with head and most fins blackish; 9? 
paler. Head 4; depth 5. D. XIII, 14. A. II, 9. Scales 7-65-11. 
1 Lat., serra, saw. 
