@ 
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 les 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. 
Men.—1 intersp. fin bone 23 inches long. 
Pon “ ise sats i 
“ “ “ 91 “ «“ 
2 
Sew 
Aas pips dt fs Ce tes 
Bytes Sp Ding uli fs 
Go sabi, sy aii eee 
Tongs é Samal gutiy Ht i 
RES cam aie! gemecae 
Brig aif ‘ Seon he? it s 
1Ooe Es g “ 1{ inches long to depression for at- 
tachment of the eleventh and twelfth fin rays. 
