178 SALMONID^. 



7. Coregonus polcur. 



Salmo lavaretus, var. Pidscliian, Pallas, Reise, iii. p. 705. 

 Salmo polcur, Pallas, Zoogr. Ross.- As. iii. p. 400, 

 ? Coregonus polcur, Cuv. ^ Val. xxxi. p. 506. 



D. 13. A. 16. 



Magnitude bispithamalis. Caput breve, crassum, pingue, corpore 

 non compressius. Rostrum obtusum, convexum, maxilla superiore 

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

 tulum, cyprinaceum, lamina mystacea brevi scabritie omnino nulla. 

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

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

 gibbus, quam dorsum, proesertim 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. Longitudo a summo rostro ad 

 finem caudae carnosae 1' 2" 10'", capitis ad operculorum cram 2" 9'", 

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

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

 inde ad caudae basin 1" 5|"'. Item distantia pinnae dorsi fere oppo- 

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

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

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

 pitis ad nucham 3", crassities 1" &". Laminae mystaceae longitude 

 6'". (Pallas.) 



River Ob, periodically ascending from the Arctic Sea. 



y. Upper Jaw obtuse, longer than, or as long as lower, toith the upper profile 

 nearly straight. 



* Snout obltquelg truncated, with the nose protruding. 



t European species. 



8. Coregonus lavaretus. 



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



(Northern Prussia) ; Weiss-felchen (Lake of Constance) ; Boden- 



renke (Bavaria). 

 Sandfelchen, Sandgangfisch, Mangolt, Fischhuch, pp. 26, 40. 

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

 Farra, Rondel, ii. p. 104 ; Gesner, De Aquat. p. 35. 

 Coregonus, Art, Gen. p. 10. no. 2 ; Spec. 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, Adelfisch, Weissfelchen, Wartmann, Beschiift. Berl. Ges. 



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

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



Jlelv. Ichth. p. 139 ; Martens, Corr. Blatt. Wiirt. Landto. Verein. 



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

 Corregonus ferra, Jiirine, Mem. Soc, Phys. 8f Hist. Nat, Genhve, iii. 



1825, p. 190, pi. 7. 

 Coregonus maraena, Nilss. Prndr. p. 15 ; Cuv. 8f Val. xxi. p. 481, pi. 



629 ; Siehold, Smswasse7-Jische, p. 203. 

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



