183 



The following description of a trout is taken 

 from a fish of twelve inches in length. The 

 length of the head, compared to the length of 

 the head and body, not including the caudal- 

 rays, was as one to four; the depth of the 

 body, rather more than the length of the head ; 

 the dorsal-fin commenced half-way between the 

 point of the nose and the commencement of the 

 upper caudal-rays ; the third ray of the dorsal- 

 fin, which is the longest, longer than the base 

 of the fin : the origin of the adipose -fin, half- 

 way between the commencement of the dorsal- 

 fin and the end of the upper half of the tail ; 

 the pectoral-fin, two-thirds of the length of the 

 head ; the ventral-fins under the middle of the 

 dorsal-fin, and half-way between the origin of 

 the pectoral-fin, and the end of the base of the 

 anal-fin ; the anal-fin begins half-way between 

 the origin of the ventral-fin, and the com- 

 mencement of the inferior caudal-rays. The 

 tail but slightly forked, and growing slowly up 

 to square in old fish, or even very slightly con- 

 vex. The fin-rays in number are 



D. 14: P. 14: V. 9: A. 11: C. 19. 



Vertebrae 56. 



The form of the head blunt ; the eye large, 

 placed one diameter and a half from the end of 



