LIST OF PLATES. 
Figs. 5—8.—Morrhua proxima, Grd.—p. 142. 
Plate XL6 .-Psettichthys sordidus, Gird.—p. 155. 
Plate XLI.-Figs. 1 — 3. —Pimelodus olivaceus, Gird.— p. 211. 
Figs. 4—6.—Pimelodus catulus, Gird.—p. 208. 
Plate XL1I.- Pimelodus olivaceus, Grd. — p. 211. 
Plate XLIII.-(This plate is to be suppressed.) 
Plate XLIY.-Pimelodus ailurus, Grd.—p. 210. 
Plate XLV.-Figs. 1—4.—Mylocheilus fraterculus, Grd.—p. 21^. 
Figs. 5—8.—Mylocheilus lateralis, Agass.—p. 215*. 
Plate XLYI.-Figs. 1 — 4.— Mylocheilus caurinus, Grd.— p. 213. 
Figs. 5—8.—Mylopharodon conocephalus, Grd.—p. 216. 
Plate XLYIL—-Mylopharodon robustus, Ayres. 1 —p. 216. 
Plate XLVIII.——Figs. 1—4.—Carpiodes damalis, Grd.—p. 218. 
Figs. 5—9.—Moxostoma claviformis, Grd.—p. 219. 
Plate XLIX.-Figs. 1—4.—Ptychostomus haydeni, Grd.—p. 220. 
Figs. 5—9.—Acomus griseus, Grd.—p. 222. 
* Plate L.---Acomus lactarius, Grd.—p. 223. 
Plate LI.-Catostomus sucklii, Grd.—p. 226. 
Plate LII.-Figs. 1—5.—Hyborhynchus puuiceus, Grd.—p. 232. 
Figs. 6—10.—Dionda grisea, Grd.—p. 230. 
Figs. 11—15.—Hyborhynchus puniceus, Grd.—p. 232. 
Figs. 16—20.—Hyborhynchus perspicuus, Grd.—p. 231. 
Figs. 21—25.—Dionda plumbea, Grd.—p. 228. 
Figs. 26—30.—Dionda spadicea, Grd.—p. 229. 
Plate LIII.--Figs. 1—4.—Orthodon microlepidotus, Grd.—p. 237. 
Figs. 5—8.—Hybognathus argyritis, Grd.—p. 235. 
Plate LIT/ -Figs. 1 — 4. —Lavinia exilicauda, B. & G.— p. 241. 
Figs. 5—8.—Argyreus dulcis, Grd.—p. 243. 
Plate LV.-Pogonichthys communis, Grd.—p. 247. 
Plate LVI.--Figs. 1—4.—Pogonichthys inaequilobus, B. & G.—p. 245. 
Figs. 5—8.—Exoglossum mirabile, Grd.—p. 256. 
Plate LVII.--Figs. 1—4.—Alburnops shumardi, Grd.—p. 261. 
Figs. 5—8.—Alburnops illecebrosus, Grd.—p. 262. 
Figs. 9—12.—Alburnellus dilectus, Grd.—p. 259. 
Figs. 13—16.—Alburnops blennius, Grd.—p. 261. 
Figs. 17—21.—Gobio aestivalis, Grd. 2 —p. 248. 
Plate LYIII.-Figs. 1—5.—Cyprinella umbrosa, Grd.—p. 266. 
Figs. 6—10. 3 —Cyprinella whipplii, Grd.—p. 270. 
Figs. 11—15. 4 —Moniana pulchella, Grd.—p. 275. 
Figs. 16—20.—Cyprinella notata, Grd.—p. 269. 
Figs. 21—25.—Cyprinella lepida, Grd.—p. 268. 
x By error: Mylopharodon robbstus, Agass. 
2 This species is described in the Report of the United States and Mexican Boundary Commission, in the accompanying 
plates of which Gobio gelidus of the present report is figured. 
3 By error : figs. 5—8. 
4 By error: figs. 9—15. 
V 
