ZOOLOGY. 
52 
27. PIMELODUS CATULUS, Grd. 
Gen. Rep. 208. Plate XLI, Figs. 4—6. 
Spec. Char.— Head very much depiossed, constituting a little less than the fourth of the total length. Jaws equal; mouth 
of medium size. Eye rather small, sub-circular; its diameter entering about six and a half times in the length of the side of the 
head, and four times over the interocular space. The base of the anal enters five times in the total length. Caudal posteriorly 
sub-truncated, and constituting the sixth of the total length. Pectoral spines serrated upon their inner and outer aspects. 
926 and 927. Fort Smith, Arkansas. Dr. Geo. G. Shumard. 
28. PIMELODUS ANTONIENSIS, Grd. 
Gen. Rep. 209. 
Spec. Ciiau.— Hoad quite depressed, nearly wedge-shaped, constituting about the fourth of the total length. Upper jaw 
longest; mouth large. Eye small, sub-elliptical; its diameter entering about eight times in the length of the side of the head, 
and somewhat over four times in the interocular space. Dorsal spine slender, slightly serrated posteriorly. Base of anal fin 
somewhat longer than the head. Caudal fin posteriorly rounded, forming a little less than the sixth of the total length. Pectoral 
spine serrated upon its inner edge. Reddish brown above; whitish beneath. 
923. Near San Antonio, Texas, Dr. C. B. Kennerly. 
29. PIMELODUS FELINUS, Grd. 
Gen. Rep. 209. 
Spec. Ciiau. —Head very much depressed, entering four and a half times in the total length. Mouth large ; jaws equal. Eye 
moderate, sub-circular; its diameter being comprised about six times in the length of the side of the head, and about thrice 
on the interocular space. Dorsal spine slender, posteriorly serrated. Base of anal fin entering four times and one-third in the 
total length. Caudal rounded off posteriorly, forming the sixth of the total length. Pectoral spines serrated upon their inner 
and outer edges. 
924. Trib. of Gypsum creek, Canadian. H. B. Mollhausen.—925. Coal creek, Arkansas. 
H. B. Mollhausen. 
30. MOXOSTOMA CLAVIFORMIS, Grd. 
Gen. Rep. 219. Plate XLVIII, Figs. 5—9. 
Spec. Char. —Head constituting the fifth of the total length. Mouth rather small; lips conspicuously plaited or ridged. Eye 
moderate sized, circular; its diameter contained about four times in the length of the side of the head. Anterior margin of dorsaj 
fin nearer the snout than the base of the caudal. Yentrals inserted opposite the fifth ray of the dorsal. Caudal fin posteriorly 
concave. Anal fin narrow and deep. Scales much longer than deep, very much imbricated. Yellowish brown, rather dusky 
along the dorsal region. 
165. Coal creek, tributary of South Fork of Canadian. H. B, Mollhausen. 
31. DIONDA PLUMBEA, Grd. 
Gen. Rep. 228. Plate LII, Figs. 21—25. 
Spec. Char —Body elongated, sub-fusiform, compressed. Head sub pyramidal, anteriorly blunt, constituting the fifth of the 
total length. Gape of mouth slightly arched, its angle not extending as far as a vertical lino drawn in front of the orbit. The 
eye is large, sub-circular. The caudal fin enters about six times in the total length. Insertion of ventrals situated slightly back¬ 
wards of the anterior margin of the dorsal. Scales moderate sized, deeper than long. Greyish brown above; whitish or 
yellowish beneath, with a black spot at the base of the caudal. 
35. Head waters of Canadian river. H. B. Mollhausen. 
