168 NOTES ON THE SALMO SALAR SPECIMEN—MORROW: 
divergence of which will be perhaps better understood by men- 
tioning that while it lies at an angle of about 14° with the spinal 
column, the ventral sp. ray springing from this centrum forms 
its angle about 65°. 
0. 38. The spinous ray No. 36 is about 1; inches long (being a 
sudden increase of length) and is free—that is, only attached by 
tissne to the interspinous fin bones of the anal fin. It and the 
succeeding four spinous rays have wide ventral ends for similar 
attachment, and are of about equal length. 
C.39. The end of the 37th sp. ray has opposite its point the 
4th intersp. bone of the anal fin. 
C. 40. The 38th sp. ray has opposite its anterior edge, the 5th 
intersp. anal fin bone, and opposite its point, the 6th intersp. 
fin bone. 
C. 41. Slightly in front of the 39th sp. ray is the 7th intersp. 
fin bone, and the 8th is opposite its point. 
C. 42. The 40th sp. ray has opposite its centre, the 9th intersp. 
fin bone ; and the dorsal extremity of the 10th and last intersp. 
C. 43 fin bone of the anal lics exactly between this and the 41st 
sp. ray, which is about the same length as the five preceding rays, 
but its ventral end is somewhat narrower. 
C. 44. The 42 sp. ray., The ventral extremities of these 4 spi- 
LO Ee EE nous rays are about the same breadth 
46. eNpaiie SE ie the 41st, but the tissue attaching to. 
47. OA anne them, the posterior edge of the 10th 
intersp. fin bone of the anal, which curves posteriorly, (its ventral 
end being opposite at right angles to the end of the 44th spinous. 
vay, in order to afford sufficient support), is stronger than that in 
some other parts of the fish. The total depth of the skeleton at 
the anterior edge of the anal fin to the edge of the dorsal sp. rays 
is 5 inches, and at its posterior edge 33 inches. 
C. 48. The 46 sp. ral These sp. rays are regular in shape, but 
LOS OA ae | their ventral ends are not expanded, 
OO pi AST ia tas, ey show a gradual decrease in length, 
51. “ 49 “© | which begins from the 41st sp. ray, the 
52. “ 50 “ J 50th ray being 1; inches long. 
C.53 51, This ray is stronger than those immediately pre~ 
