12 CTPaiNIDiB. 



First Group. CATOSTOMINA. 



Pharyngeal teeth in a single series, exceedingly numerous and 

 closely set. Dorsal fin elongate, opposite to ventrals ; anal short 

 or of moderate length. Barbels none. 



North America and North-eastern Asia. 



1. CATOSTOMUS*. 



Catostomus, sp., Lesueur, Jouni. Ac. Nat. Sc. Philad. i. 1817, p. 88 ; 



Cuv. 8,- Veil. xvii. p. 418. 

 , sp., et Rhytidostomus, sp., Heckel, in Russeqger' s Reisen, i. 



p. 1022. 

 Ptvchostomus, Hylomyzon et Catostomus, Agassiz, in Amer, Journ, 



Sc. Sr Arts, xix. ] 8.55, pp. 88-92. 

 Minomus, Acomiis, &c., Girard, Proc. Ac. Nat. Sc. Philad. 1856, p. 173. 



Scales of small, moderate, or large size. Lateral line present, 

 running along the middle of the tail. Dorsal fin of moderate ex- 

 tent, with not more than about seventeen rays, opposite to the ven- 

 trals, without spine. Anal fin very short but deep. Fins of the males 

 generally more produced than those of the females, and frequently 

 with horny tubercles. Mouth inferior, with the lips more or less 

 thickened and papillose, the lower frequently bilobed. Barbels 



* 1. Catostomvis longirostrum, Lesueur, I. c. p. 102. — State of Vermont. — 

 Snout Icmg; eyes large; scales very small. D. 12 (? 13). Five iuches 

 long. 



2. oneida, Dekay, New York Fauna, Fish. p. 198. — Lake Oneida. — 



D. 15. Scales large. 



3. Ptychostomiis albidus, Girard, in U. St. 8( Mex. Bound. Survey, Ichthyol. 



p. 36, pi. 19. figs. 5-8. — Rio San Juan, New Leon. — Scales rather small. 



4. Catostomus insiguis, Bairdif Girard, in Proc. Ac. Nat. Sc. Philad. 1864, 



p. 28 ; Minomus insignis, Girard, in U. St. ^- Mex. Bound. Survey, 

 Ichthyol. p. 37, pi. 21. figs. 1-4.— Eio San Pedro, Tributary of Rio 

 Gila.— D. 13. L. lat. 60. 



6. clarkii, Baird H^ Girard, in Proc. Ac. Nat. Sc. Philad. 1854, p. 27; 



Minomus clarkii, Girard, in U. St. 8( Mex. Bound. Survey, Ichthyol. 

 p. 38. pi. 22. figs. 5-8.— Rio Santa Cruz.— D. 13-14 (12 in figure). 

 L. lat. 68-70. 



6. (Acomus) generosus, Girard, in Proc. Ac. Nat. Sc. Philad. 1856, 



p. 174; or in U. St. Pac. E. R. Exped. Fish. p. 221.— Cottonwood 

 Creek, Utah. — Scales very smaU. 



7. — — (Acomus) lactarius, Girard, in Proc. Ac. Nat. Sc. Philad. 1856, 



p. 174 ; U. S. Pac. R. E. Exped. Fish. p. 223, pi. 50.— Upper Missouri. 



8. i sucklii, Girard, in Proc. Ac. Nat. Sc. Phil. 1856, p. 175 ; U. S. Pac. 



E. E. Exped. Fish. p. 226, pi. 51. — Milk River, Upper Missouri. — 

 D. 14. Scales large. 



9. texanus, Abbott, Proc. Ac. Nat. Sc. Philad. 1860, p. 473.— Colorado 



and New Rivers. — D. 15. " Scales of medium size." 



10. chloropteron, Abbott, I. c. — Kiinsas. — D. 13. 



11. Cyprinus rostratus. Tiles. Mem. Ac. Sc. St. Petersb. iv. 1813, p. 454, 



tab. 15. figs. 1-2 ; or in Pcdlas, Zoogr. Eoss.-As. iii. p. 307 ; Catostomus 

 tilesii, Cuv. ^ Vcd. xvii. p. 469. — Eastern Siberia. — Scales small ; snout 

 much produced, the eye being behind the middle of the length of the 

 head. Lower lip Ijilobpri. 



