1888.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 353 



not rounded, but obliquely truncate, almost einarginate, the lower lobe 

 slightly the longer. Color dark yellowish-brown, finely puuctulate 

 above, paler below; base of caudal and most of the lower lobe black; 

 sometimes all black except the tip of the upper lobe ; dorsal black at 

 base, pale above. 



This species is one of the most distinct in the genus. It is nearest 

 related to N. exilis, N. nocturnus, and N. leptacanthus, but it is well 

 separated from all of these. 



Many specimens were obtained in the Roanoke River, at Roanoke, 

 Salem, and Alleghany Springs. It is found in company with the " Mad 

 Tom," Noturus insignis. It is less abundant than the latter, however, 

 and reaches a smaller size. 



We have named this species for our friend and colleague Dr. Charles 

 H. Gilbert. 



3. Moxostoma rupiscartes* Jordan & Jenkins, sp. nov. (Type No. 39927, U. S. 

 Nat. Mus.) 

 Closely allied to Moxostoma cervinum, differing chiefly in its smaller scales and 

 more uniform coloration. It reaches a larger size; its lips are larger, and the form 

 of its dorsal fin is some what different. 



Head, 4f in length ; depth, 5£ to 6. D. 11. A. 8. Scales 6-50-6. 

 Length of largest specimen, 11 inches. 



Body long and low, slender, subterete anteriorly, compressed behind. 

 Head very short, broad, flat between the eyes. Snout bluntish, project- 

 ing beyond mouth; its length 2^ in head. Eye moderate, 4 J in head; 

 interorbital width 2£ in head. Lips full, the lower truncate behind, 

 plicate in young, the folds in adult so broken as to form coarse papillae ; 

 scales small, a little smaller anteriorly, 18 before dorsal (scales 43 in 

 M. cervinum, 15 before dorsal). Dorsal fin low and small, its free edge 

 concave, the first ray slightly produced, 1£ in head. Caudal short, 

 lunate, its lobes equal and bluntish, the upper 1^ in head ; pectorals 

 long, I-jV in head; ventrals short, L}; anal 1£. Air-bladder in three 

 parts. 



Color — Adult, dark olive-brown above, paler below, the dark color of 

 back extending irregularly downward, not sharply divided from the 

 paler of belly ; fins all dusky. In the adult the pale streaks along the 

 rows of scales are entirely obliterated. Young grayish, becoming grad- 

 ually paler below; faint pale streaks along the rows of scales; a faint 

 dusky spot above base of pectoral; tips of dorsal and caudal more or 

 less dusky (inky-black in M. cervinum). 



Many specimens of this species were obtained in the Catawba River 

 at Marion, in Buck's Creek at Pleasant Garden, in John's River near 

 Morganton, in North Carolina ; and in Pacollet River at Clifton, and 

 Tiger River at Cleveland Shoals, both these localities being in the 



* Rupiscartes (a hybrid word), used by Swainson to mean rock-jumper, a species of 

 Salarias which jumps on rocks, like a lizard. 



Proc. N. M. SS 23 ^fx£ 



