11. COEEaONUS. 



183 



caudal); the length of the head two-uinths, or nearly one-fifth. 

 Snout produced, obliquely truncated in front, the upper jaw being 

 considerably longer than the lower ; the maxillary extends beyond 

 the vertical from the front margin of the eye, and its length is two- 

 sevenths of that of the head. The supplementary bone of the max- 

 illary is rather broad, subsemicircular. The length of the mandible 

 is equal to the least depth of the tail. Back behind the head some- 

 what arched. Pectoral as long as, or somewhat longer than, the head 

 without snout. 



Lakes of Sweden and Finland. 



a. Fourteen inches long- 



as C. oxi/rhi/nchus. 



b. Thirteen inches long. 



Giitcborg. Presented by Hr. A, W. Malm 

 White Sea ? 



12. Coregonus hiemalis. 



Ivilcli, I^jopfielchen (Lake of Constance). La Graveuclie (Lake of 

 Geneva). 



Kirchlin, Mangolt, Fischhuch, p. 41. 



Kropffelchen, Wartinann, Schrift. Berl. Geselhch. ntrf. Freuml. iv. 

 1783, p. 431. 



Coregonus hiemalis, Jurine, Mem. Sac. Phys. et Nat. Geneve, iii. 1825, 

 p. 200, pi. 8 (not good) ; Cuv. Sj- Vol. xxi. p. 479 ; Siehold, Silss- 

 wasserf. p. 254, pi. 2 (head not good; air-bladder and belly dis- 

 tended). 



Salmo mariena media, Hartmann, Heh. Lchthyol. p. 145. 



Coregonus acronius, Rcqip, Fische Boclens. p. 22 ; Heckei 8f Kner, 

 Siisswasserf. p. 240. 



B. 8. D. 14. A. 15. L.lat. 76-87. L. transv. 9/11. Vert. 61. 

 The height of the body is one-fourth, or less than one-fourth, of the 

 total length (without caudal), the length of the head two-ninths, or 

 rather more than one-fifth ; snout rather short, as long as the ej'e, 

 obliquely truncated, with the upper jaw projecting beyond the lower. 

 The maxillary extends to below the front margin of the eye, and its 

 length is one-fourth of that of the head ; the supplementary bone of 

 the maxillary is rather narrow, of moderate length. The length of 

 the mandible is more than the least depth of the tail. Back behind 



