250) PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 
of pupil. Whole head, nape, breast, and middle line of belly naked. 
Scales rather large, the tubes of the lateral line wanting on the last 
three or four. Fins moderate, the dorsals shorter and lower than usual 
in this genus, highest in the males. Anal spine single, weak. Pee- 
torals rather long, reaching well beyond tips of ventrals, their length 
about equal to that of head. 
Color in life essentially as in Boleosoma nigrum, the males (in spring) 
with the head and fins jet black, the body blackish olive, barred with 
black. 
Females light olive, tessellated with darker, and with dusky spots 
along the lateral line. A dark spot before eye and one on back before 
dorsal; lower fins pale; both dorsals and caudal with darker bars. 
This little fish is abundant in the tributaries of the Clear Fork of the 
Cumberland. Most of the numerous types were taken in Wolf Creek. 
It is named for Mrs. Susan Bowen Jordan. 
22. Pecilichthys sagitta, sp. nov. 
Head, 31; depth, 44. D. X—13. <A. I, 10. Lat. 1. about 68 (48 
tubes). Length of typical example, 24 inches. 
Body rather slender, compressed, the back a little elevated, the caudal 
peduncle rather long and not very deep. Head very long and slender, 
eel like, tapering forward to a sharp snout, its depth at the pupil about 
one-third its length. Interorbital space narrow. Snout about as long 
as eye; 5in head. Mouth very large for the genus, oblique, the maxil- 
lary reaching to below front of pupil, 3{ in head. Jaws subequal in 
front, upper jaw not protractile; teeth rather strong. No scales on 
cheeks, opercles, or breast; nape covered with small scales. Opercular 
spine well developed. Gill membranes scarcely connected. 
Scales on body small, firm, ctenoid. Humerus with its margin black, 
searcely enlarged. Lateral line nearly straight, becoming obsolete under 
last rays of second dorsal. Belly covered with ordinary scales. 
Dorsal spines slender, rather high. Soft dorsal rather higher, its base 
shorter. Anal nearly equal to soft dorsal, its base somewhat shorter, 
its rays a little higher. Anal spine slender, single in the typical exam- 
ple, the normal number probably two. Caudal truncate, 14 in head, 
about as long as the ventrals, which are rather shorter than the pec- 
torals. 
Color in life, dusky green, with markings of darker olive, the latter 
forming about nine obscure cross-bars, which are about as wide as the 
interspaces, these most distinct posteriorly and below the lateral line. 
A dusky spot at base of caudal. A roundish orange spot in each of 
the pale interspaces between the bars along the sides. Some minute 
orange spots above the lateral line. A narrow black streak along-side 
of head through eye. A pink spot in front of eye above. Snout tinged 
with orange. First dorsal translucent, with a narrow edge of orange. 
Soft dorsal translucent, speckled with dusky and pale orange. Tail 
