11. COBEGONUS. 189 



Coregonus cepedii, C'uv. ^- Vol. xxi. p. 503 ; Yarr. Brit. Fish. 3rd edit. 

 i. p. 314. 



B. 9. D. 14-1.5. A. 13-16. L. lat. 73-90. L. transv. 9/11. 

 Cffic. pyl. 120. Vert. 38/20. 



Closely allied to G. tvartmanni. The height of the body is one- 

 fourth of the total length (without caudal), the length of the head 

 two-ninths. Snout as long as the eye, truncated, with the upper 

 jaw but little longer than the lower. The maxillary extends some- 

 what beyond the vertical from the front margin of the eye, and its 

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

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

 than the least depth of the tail. Back behind the head arched and 

 ascending in a strongish curve. Pectoral longer than the head (with- 

 out snout) . Fins blackish or black ; head and base of the caudal 

 sometimes with small blackish dots. 



Lakes of Great Britain. 



a. Numerous skins. Loch Lomond. From Mr. Parnell's Collection. 

 h. Adult: skin. Loch Lomond. From Mr. PameU's Collection. 



Tj-pe of Coregonus microcephaJus, ParneU. 

 c-d. Fine specimens. Haweswater, Cumberland. Presented by Dr. 



A. Giinther. 

 e. Adult : skin. Cumberland. From Mr. Yarrell's Collection. 

 f-g. Adult. TJllswater, Westmoreland. Presented by W. T. Teget- 



meier, Esq. 

 h. Adult. TJllswater, Westmoreland. Presented by the Eev. R. 



Everest. 

 i. Adult. 



A-. Adult. Bala Lake*. Presented by Dr. A. Giinther. 

 I. Adult : skin. Bala Lake. Presented by Sir W. Jardine. 

 in. Adult female: skeleton, rilswater. Presented by W. T. Teget- 



meier, Esq. 



23. Coregonus maxillaris. 



Lof-sik, Lloyd, Scand. Advent, i. p. 131 (fig. not good). 

 B. 9. D. 13. A. (14-) 16. L. lat. 87(-96)t. L. transv. 11/11. 

 The height of the body is two-sevenths of the total length (without 

 caudal), the length of the head two-ninths ; snout longer than 

 the diameter of the eye, which is nearly one-fifth of the length of 

 the head ; it is rather broad and vertically truncated in front, with 

 the lower jaw a little shorter than the upper. luterorbital space 

 flattish, its width being equal to once and two-thirds the diameter of 

 the eye. Maxillary well developed, strong, two-sevenths of the length 

 of the head, with a longitudinal ridge, extending somewhat beyond 

 the vertical from the front margin of the eye ; supplementary bone 



* This locality is described by Valenciennes (p. 509) as "ce lac de Fer, le 

 Llyd-Thid," which ]3robably ought to be interpreted Llyn Tegid, the Welsh 

 name meaning a " Fair Lake." 



t The numbers in brackets arc taken from the second dried specimen. 



