48 
ZOOLOGY. 
riorly to the anterior margin of the dorsal, their tips reaching the vent. Scales moderate. Reddish brown above, spotted with 
black; greyish beneath. Soft portion of dorsal and anal fins provided with a black patch. 
375. Tributary of Gypsum creek, Canadian. H. B. Mollhausen. 
6. CALLIURUS LONGULUS, Grd. 
Gen. Rep. 16. Plate Y, Figs. 5—8, and Plate VI, Figs. 5—8. 
Spec. Char. —Mouth moderate; gape oblique upwards. Posterior extremity of maxillary extending to a vertical line inter¬ 
secting the pupil. Eyes moderate. Insertion of vcntrals situated opposite the inferior edge of the base of the pectorals aud 
posteriorly to the origin of the dorsal, their tips extending to the vent. Scales moderate. Reddish brown above; greyish 
beneath. Soft portion of dorsal and anal fins provided with a black patch. 
407. Rio Seco, Texas. Dr. C. B. Kennerly. 
7. CALLIURUS MICROPS, Grd. 
Gen. Rep. 17. Plate IY, Figs. 5—8. 
Spec. Char. —Mouth moderate; gape oblique upwards. Posterior extremity of maxillary extending to a vertical line drawn 
midway between the anterior rim of the orbit and the pupil. Eye small. Insertion of ventrals situated posteriorly to the base 
of pectorals and the origin of the dorsal; their tips not reaching the vent. Scales moderate. Reddish brown above, with 
centre of scales lighter; greyish beneath. Soft portion of dorsal provided with a black patch. 
413 and 414. Rio Brazos, Texas. Dr. George G. Shumard. 
8. BRYTTUS ALBULUS, Grd. 
Gen. Rep. 19. Plate YI, Figs. 1—4. 
Spec. Char.— Body sub-elliptical, rather contracted and deep. Nape convex, and snout sub-conical. Posterior extremity 
of maxillary extending to the anterior rim of the orbit. Insertion of ventrals situated posteriorly to the base of the pectorals 
and the anterior margin of the dorsal; their tips overlapping the vent. Scales rather large. Pale reddish brown, lighter 
beneath than above. Fins greyish olive; dorsal with a black patch. 
421. Rio Blanco, Texas. Dr. C, B. Kennerly. 
9. BRYTTUS SIGNIFER, Grd. 
\ 
Gen. Rep. 20. Plate VII, Figs. 5 — 8. 
Spec. Char. —Body contracted and deep. Nape convex, and snout sub-conical. Posterior extremity of maxillary extending 
to a vertical line drawn in advance of the pupil. Insertion of ventrals situated posteriorly to the base of pectorals and the 
origin of dorsal, their tips overlapping the vent. Scales moderate. Reddish brown, lighter beneath than above; dorsal and 
anal fins provided with a black patch. 
422. Rio Medina, Texas. Dr. C. B. Kennerly. 
10. BRYTTUS HUMILIS, Grd. 
Gen. Rep. 21. Plate YII, Figs. 9—24. 
Spec. Char. — Body sub-elliptical. Nape convex, and snout sub-conical. Posterior extremity of maxillary extending beyond 
the anterior rim of the orbit. Insertion of the vcntrals situated posteriorly to the base of pectorals, and a little in advance 
of the origin of the dorsal, their tips overlapping the vent. Scales large. Reddish brown or dusky, maculated. Fins unicolor; 
dorsal sometimes blotched. 
423—428. Near Rock Mary, Old Fort Arbuckle, Sugar-loaf creek, Arkansas. H. B. Moll¬ 
hausen . 
