FISHES OF PENNSYLVANIA. 121 



and the depth about five times, in the total length. The snoutissomewhat decurved. 
Mouth small and the lower jaw included within the upper. The gill-covers are 
scaly, cheeks naked except in occasional individuals, and the nape is usually scaled. 
The fins are high, but lower and smaller than in other species of Boleosoma. 
Color olivaceous; the back with brown tessellations; sides with many w-shaped 
blotches. The head is speckled above ; in males generally black. In the breeding 
season the whole anterior portion of the male is often black. A dark line forward 
from the eye and sometimes another one downward. 
The Johnny darter ranges from western Pennsylvania to Missouri and 
Dakota. In the Great Lake region it is abundant and is one of the 
commonest darters in the streams of Ohio. It does not occur in eastern 
Pennsylvania. 
134. Etheostoma sesopus (CcP2). 
The Spotted Darter. 
[Boleosoma wsopus Cope, Proc. Amer. Philos. Society, 1870, p. 270. | 
“The dorsal line descends regularly from the base of the first dorsal fin to between 
the orbits, and then curves more abruptly to the mouth. Mouth terminal ; eye four 
times in head, once in advance of its front rim. The dorsal line descends from the 
first dorsal tin, toa somewhat contracted caudal peduncle. Dorsal fins much ele- 
vated, VII-14. Pectorals alittle elongate, not reaching vent, but little exceeding the 
very moderate ventrals. A. 10. Scales 5-47-8. Color light brown, with six small 
dark dorsal spots, and ten similar small spotson the lateral line. A black bar round 
muzzle, and one below eye. : 
“Total length, 26.6 lines; of tail, 4.3 lines; of pectoral fin, 5.2 lines; depth at first 
dorsal, 4.6 lines; at nape, 3.4 lines; of caudal peduncle, 2.3 lines.”’ 
The form of this fish is rather that of a Pecilichthys, while the absence 
of spinous anal rays is peculiar to the present species. From the number 
of rays, ten, in the anal, it is probable that the missing spinous ray is 
represented by the first cartilaginous ray, and is not wanting. In gen- 
eral it is so near to the B. olmstedi, as not to be removed from the genus. 
“Found in the Loyalsock creek, in the Allegheny region, in Lycoming 
county, Pennsylvania, by Aubrey H. Smith, of Philadelphia.” 
This is a little species and has received no common name. Dr. Jordan 
thinks it may be identical with B. effulgens of Girard, which grows to a 
length of two and one-half inches, and that this again may be only a 
variety of the Johnny darter (B. nigrum.) 
The species was orignally described by Prof. Cope from an example 
two and one-fourth inches long which was taken in Loyalsock creek, a 
tributary of the Allegheny river. No other specimens of the species 
have since been recorded. 
1385. Etheostoma blennioides Rarinesaque. 
The, Green-sided Darter. 
The body is stout and long; the head moderate in size, its length contained four 
and one-half times in the total and slightly exceeding the depth of the body. Mouth 
small; lower jaw included within the upper. The eyes are large, placed high and 
narrowly separated by a longitudinal furrow. The scales are rather small except 
some larger ones on the belly which are not shed. The cheeks are finely scaled 
