178 



NOTES ON THE SALMO SALAR SPECIMEN — MORROW 



and is attached to the eighth intersp. fin bone. As the length of 

 the rays of the anal decrease so does their strength, but much 

 more in proportion in this and the remainder of the rays. 

 9th. The ninth fin ray is on the 9th intersp. fin bone, which is 

 slighter in proportion than the 8th or 10th intersp. fin bones. The 

 tenth intersp. fin bone, the end of which lies between the 41st and 

 42nd spinous rays, with its posterior ventral extremity opposite 

 at right angles to the end of the 44 sp. ray is, as will be noticed 

 by you, differently shaped from all the other intersp. fin bones of 

 this fin (somewhat resembling the posterior intersp. fin bone of 

 the dorsal fin) having a strong posterior curve at its ventral ex- 

 tremity, and an increase in breadth, presenting a broad face (or 

 end) for the articulation of three fin rays, counting, as on the 

 dorsal fin and for the same reason, the last rays as two. Its 

 extreme posterior edge is furnished with the usual attachment 

 for the muscular tissue which supports the posterior edge of 

 the fin. 



10th. The tenth fin-ray is attached to the anterior edge of the 

 tenth intersp. fin bone, which as just noticed has a slight projec- 

 tion for its articulation. 



11th & 12th. These two fin rays lie closely together, but as they 

 have a double articulation (as the two on the dorsal fin), they 

 clearly must be called two distinct rays. They are also (as in the 

 dorsal) articulated one within the other, and attached to a slight 

 depression closely in front of the posterior edge of the tenth in- 

 terspinous fin bone. 

 Mem. — 1 intersp. fin bone 2§ inches long. 



2 



tt 



tt t 



t 95 

 ^8 



3 



<i 



it t 



' 91 



4 



tt 



tt t 



' 21 



5 



,t 



tt t 



t 91 



■"16 



6 



tt 



it t 



' 2 



7 



« 



tt t 



L 8 



8 



tt 



tt t 



' 1 3 



9 

 



tt 



it 



t< t 

 tt t 



*■ 1 



If inches long to depression for at- 



tachment of the eleventh and twelfth fin rays. 



