11. COREGONUS. 187 



20. Coregonus williamsoni. 



Girnrd, Proc. Acad. Nat. Sc. Pkilad. 1856, p. 136 ; and U. S. Fac. 

 R. R. Exp. Fish. p. 326, pi. 66. 



B. 7. D. 14. A. 14. V. 12. 



The height of the body is one-fourth of the total length (without 

 caudal), the length of the head two-ninths ; eye of moderate size, 

 about one-fifth of the length of the head. Snout truncated, protruding 

 beyond the lower jaw ; mouth very small, the maxillary being broad 

 and not extending to the eye (according to the figure, the maxillary 

 would be of a very pecuhar shape, being abruptly dilated at its poste- 

 rior extremity*). Anterior margin of the dorsal nearer to the end of 

 the adipose fin than to the end of the snout. Base of the adipose fin 

 long. Scales forming eighteen longitudinal series between the dorsal 

 and ventral fins — nine above, and eight below the lateral line. ( Glr.) 



Des Chutes river, Oregon. 



This species belongs, perhaps, to the second division of this genus. 

 ** Snout vertically truncated. 



21. Coregonus wartmanni. 



Blau-felchen, Gangfisch (Lake of Constance) ; Eenke (Bavaria). 



Mangolt, Fischbuch,^^. 2.5,40; Wartmann,Beschaft.Berl.Ges.Naturf. 

 Freund. iii. 1777, p. 184. 



Lavaretus, Bellon. p. 284 ; Gesner, De Aquat. p. 34 et seq. 



Bezola, Rondel, ii. p. 163 ; Gesner, De Aquat. p. 35. 



Albula paiTa, Gesnet; De Aquat. p. 38. 



Coregonus, sp. 2, Artedi, Si/no7i. p. 19. var. a, y, & S. 



Salmo wartmanni, Block, Fische Deutschl. iii. p. 165, taf. 105 ; Schrank, 

 Faun. Boica, p. 324 ; Bapp, Fische d. Bodoisee's, p. 12, taf. 1 (ex- 

 cellent figure) ; Hvckel, S/tzr/sh. Akad. Wiss. Wien, 1851, viii. p. 375 ; 

 Heck. !§• Kner, Siisswasserf. p. 235 ; Siebold, Siisswasser/. p. 243. 



Salmo renke, Schrank, Schrift. Berl. Ges. naturf, Freund, iv. 1783, 

 p. 427. 



Salmo marasnula, albula, "wurtmaimi, JIartma)in,IIelvet.Ichth. pp.148, 

 152 & 154. 



Coregonus lavaretus, Ct/v. ^ Vol. xxi. p. 466, pi. 627. 



palea, Cuv! 8f Val. xxi. p. 477, pi. 628 (bad) ; Heck^l, Sitzgsher, 



Akad. Wiss. Wien, 1851, viii. p. 375. 



reisingeri, Cuv. Sf Val. xxi. p. 496. 



nilssoni, Cuv. Sf Val. xxi. p. 497 (e. p.). 



B. 9. D. 14. A. 14-15. L. lat. 80-92. L. transv. 10/11. 



Vert. 59-60 1. 

 The height of the body is rather more than the length of the head, 

 which is contained four times and one-half or four times and three- 

 fourths in the total (without caudal). Snout but little longer than 

 the eye, vertically truncated, with the jaws equal in front. The 

 maxillary extends to, or a little beyond, the vertical from the front 

 margin of the eye, and its length is one-fourth or somewhat more 



* I suppose tliis to be an eiTor in the drawing. 



t 57 according to Rapp, but we believe that this author has not counted the 

 last vertebra; between the basal bones of the caudal fin. 



