i7o SALMONID.'E. 



7. Coregonus polcur. 



Salmo lavaretus, v.ir. PiJschiaii, Pul/as, Hcisc, iii. p. 705. 

 Saluio polcur, Pallas, Zuo//r. Poss.-As. iii. p. 400. 

 ? Coregouus polcur, Cuv. Sf Val. xxxi. p. .500. 



D. 13. A. 16. 



Magnitudo bispitliamalis. Caput breve, crassum, pingue, corpore 

 non compressius. Rostrum obtusum, convexum, maxiUa superiore 

 longiore ; frons ante oculos convexo-gibba. Os parvum, plane eden- 

 tulum, cj'prinaceum, lamina mystacea brevi scabritie omnino nulla. 

 Corpus crassum, lanceolatum, compressum, dorse a capite adscendente, 

 minus tamen, quam in S. muTcsum, et convexo. Venter magis 

 gibbus, quam dorsum, prsesertim versus pinnam ani productus in cari- 

 nam compressam, cui pinna insidet. Squamae majusculae ; linea 

 lateralis rectissima, dorso propiore. Color cinerascente argentatus, 

 in dorso fuscus. Pinnae nigricantes. Long-itudo a summo rostro ad 

 finem caudae carnosa) 1' 2" 10'", capitis ad opercidorum cram 2" 9'", 

 distantia oculorum a summo rostro 8", ad pinnas pectorales 2" 9'", 

 inde ad ventrales 4" 3'", inde ad analem 4", hujus latitudo 2" 2'", 

 inde ad caudae basin 1" 5^'". Item distantia pinnae dorsifere oppo- 

 sitae ventralibus 6" 8|"', ejus latitudo 2" 2'", inde ad adiposam 

 3" 10|"', hujus basis 7'", longitude 11'", corporis maxima latitudo 

 ad pin. dorsi 3" 10'", crassities maxima ibidem 1" 10'". Altitude ca- 

 pitis ad nucham 3", crassities 1" 6'". Laminae mystaceae longitudo 

 6'". (Pallas.) 



River Ob, periodically ascending from the Arctic Sea. 



y. Upper jaw obtuse, longer than, or as long as lower, with the upper profile 

 nearly straight. 



* Snout obliquely truncated, vjith the jiose 2»'otruding. 



t Etiropean species. 



8. Coregonus lavaretus. 



Sik, Knubbsik (Sweden) ; Helge-Sik (Lake Wenern) ; Maraene 



(Northern Prti^sia) ; Weiss-felcheu (Lake of Constance) ; Boden- 



renlie (Pararia). 

 Sandfelclien, Sandgangfisch, Mangolt, Fischbuch, pp. 26, 40. 

 Lavaretus, Rondel, ii. p. 162 ; Gesner, De Aquat. p. 33. 

 Farra, Rondel, ii. p. 164 ; Gesner, De Aquat. p. 35. 

 Coregonus, Art, Gen. p. 10. no. 2 ; S})ec. p. 37. no. 1 (Synon. p. 19. 



no. 2 ; this compilation of synonyms refers to various very different 



species). 

 Coregonus lavaretus, L. Syst. Nat. i. p. 512. 

 Weissfisch, Adelfiscli, Weissfelchen, Wartmann, Beschdft. Perl. Ges. 



ntrf. Freunde, iii. 1777, pp. 185, 202, and 210. 

 Salmo maraena, Bloch, i. p. 172; iii. pp. 148, 164, taf. 27; Hartm. 



Heir. Ichth. p. 139; Martens, Corr. Piatt. Wiirt. Latidw. Verein. 



1S30, x\'ii. p. 37. 

 Corregonus ferra, Jurine, Mem. Soc. Phys. Sf Hist. Nat. Geneve, iii. 



1825, p. 190, pi. 7. 

 Coregonus maraena, Nilss. Prodr. p. 15; Cav. ^ Val. xxi. p. 481, pi. 



629 ; Siebold, Siisswassei^sche, p. 263. 

 oxyrhynchus, var. /3, Nilss. Skand. Faun. Fisk. p. 454. 



