11. C0REG0NU8. 199 



39. Coregonus harengus. 



Salmo (Coregonus) hai'engus, Richards. Faun. Bor.-Amer. iii. p. 210, 



pi. i 0. f. 2. 

 ? Coregonus albus, Agassiz, Lake Superior, p. 342. 



D. 12. A. 13. L. lat. 74 (-84, Richards.). L. transv. 9/12. 



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

 which is two-ninths of the total (without caudal) ; the distance of 

 the occiput from the front margin of the upper jaw is less than one- 

 half of its distance from the origin of the dorsal fin. The diameter 

 of the eye is less than the length of the snout, which is pointed. 

 Maxillary of moderate length and width, its length being contained 

 thrice and three-fourths in that of the head. Length of the man- 

 dible much more than the least depth of the tail. There are eight 

 longitudinal series of scales between the lateral line and the root of 

 the ventral fin. 



Lake Huron. 



The characters are taken from one of the typical specimens in the 

 Haslar Collection ; it is not in a good state of preservation. I 

 believe that this species is distinct from C. clwpeoides and C. luddus, 

 having the maxillary much less developed. 



* Body elevated, its height being one-third of the total length 

 {without caudal). 



40. Coregonus tullibee. 



Salmo (Coregonus) tullibee, Richards. Faun. Bor.-Amer. iii. p. 201. 

 D. 15. A. 15, V. 13. L. lat. 77. L. transv. 10/12. 



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

 caudal), the length of the head more than one-fifth (the caudal fin 

 included). The distance of the occiput from the front margin of the 

 upper jaw is less than one-half of its distance from the origin of the 

 dorsal fin. The diameter of the eye is less than the length of the 

 snout, which is pointed. MaxiUary long, about two-sevenths of the 

 length of the head ; length of the mandible more than the least depth 

 of the tail. There are eight longitudinal series rf scales between 

 the lateral line and the root of the ventral fin. 



Arctic North America. 



a. Stuffed, 15 inches long. Albany River. Presented by Sir J. 

 Richardson. 



41. Coregonus C3rprinoides. 



Peled, Lepechin, Reise, iii. p. 226, taf. 12. 



Salmo cyprinoides, Pall. Zoogr. Ross.-As. iii. p. 412. 



pelet, Pall. I. c. 



Coregonus cyprinoides, Cuv. ^ Val. xxi. p. 527. 



D. 14. A. 15. V. 13. L. lat. 90. 

 The height of the body is one-third of the total length ; head short, 

 its length being less than one-fifth of the total ; pectoral small. 

 Rivers Lena, Jenisei, Petschora. 



I have not seen the typical specimen of this species. 



