306 



NORTHERN ZOOLOGY. 



with the margins of the upper and lower jaw when the mouth is closed : mouth considerably 

 larger, being cleft as far back as the edge of the orbit : anterior sub-orbital more oblong and 

 perforated by a greater number of foramina : the gill-cover less widely rounded, and the 

 edge of the operculum concave, though not so much so as in leuciscus gracilis, pi. 78. The 

 dorsal also stands farther back, being nearer to the tip of the tail than to the point of the snout, 

 while the ventrals stand under the first dorsal ray, and midway between the orbit and base of 

 the central caudal rays. The distance from the gill-openings to the ventrals reaches from the 

 latter to half way between the anal and caudal. The size of the scales, generally, and their 

 number on the lateral line, is the same as in leuciscus caurinus, but their form is more per- 

 fectly orbicular, and those on the belly are proportionably smaller. 



Fins.— Br. 3—3; P. 15; D. 10; V. 9 ; A. 9 ; C. 19f 



" Colour of the back and top of the head intermediate between yellowish grey and brocoli- 

 brown, passing gradually on the sides, below the lateral line, into sulphur-yellow, the latter 

 colour prevailing also on the cheeks, gill-covers, and bases of the fins. The belly is silvery 

 white." (Dr. Gairdner.) 



Dimensions. 



Inches. Lines. 



Length from tip of snout to extremity of 



caudal ..... 



„ „ end of central caudal rays 



,, „ base of ditto . 



., „ end of anal 



„ „ beginning of ditto . 



„ „ anus 



„ „ end of dorsal 



„ „ ventrals . 



„ „ beginning of dorsal 



„ „ pectorals . . 



„ „ tip of gill-cover 



„ „ tip of bony operculum 



„ „ nape . 



„ „ posterior edge of orbit 



„ „ anterior ditto 



„ „ anterior nostril . 



,, „ tip of labial . . 



,, of margin of upper jaw one side 



„ ditto under jaw 



„ under jaw to articulation . 



13 

 11 



10 

 8 

 7 

 7 

 7 

 6 

 6 

 3 

 3 

 2 

 2 

 1 

 

 

 1 

 1 

 



1 







11 



10 



7 



2 



1 



1 



2 



1 

 11 



4 



5 

 11 



7 



2* 



2* 

 10 



4* 



Height of gape of mouth 

 Length of ditto transversely 



„ pectorals . 



„ ventrals . 



Height of dorsal anteriorly . 



„ ditto posteriorly 



Length of attachment of dorsal 



„ „ anal 



Height of anal anteriorly 



„ ditto posteriorly 



Length of caudal lobes 



„ its middle rays 



Depth of caudal fork . 

 Height of body before dorsal 

 Greatest thickness 



„ circumference . 

 Thickness at nostrils . 



„ between orbits . 



„ of nape 



Weight 9 oz. 2 dr. 



Inches. 



Lines 



1 











1 

 1 



10* 



8* 



1 



8 







9 



1 



2 







11 



1 



6 





 2 

 1 

 1 



«* 

 



2 



3 



1 

 5 



24 

 3 







9* 







10J 



1 



3 



Page 141. Sewin, Salmo Cambriscus. 



Mr. Yarrell, in the tenth number of his History of British Fishes, which has 

 just reached me, states this fish to he the same with the Salmo eriox of Linneeus, 

 Salmo griseus seu cinereus of Ray and Willughby, and the Whitling and Bull 



