NOTES ON THE SALMO SALAR SPECIMEN — MORROW. 1 77 



but cartilaginous matter between it and its suspending plate. 

 This soft ray is so closely covered with fatty tissue as scarcely to 

 be noticed unless by dissection. 



1st ray. Directly in a line with the first intersp. fin bone is the 

 first short fin ray, which (as do all the remaining fin rays) divides 

 at a short distance from its articulation with the intersp. fin bone, 

 one half passing to each side of it, the foot shaped joint pointing 

 posteriorly being comparatively shorter than the others. The 

 length of this ray is 1\ inches, and its anterior face is attached 

 b} 7 tough fatty tissue to the rudimentary ray first described. 

 2nd. The second short fin-ray is directly opposite, and attached 

 to the end of the second intersp. fin bone, shaped like the first. 

 It is I4 inches long. 



3rd. The third or first perfect fin-ray is attached to the anterior 

 edge of the third intersp. fin bone, and this in its turn is attached 

 to the end of the peculiar spine, which springs from the thirty- 

 sixth centrum, and to which as before noticed the end of the 

 thirty-fifth ventral sp. ray is united. And here it would 

 seem that as this is the first perfect or full length fin- ray 

 of the Anal, some provision was required to add to its strength, 

 which is attained by the junction of the thirty-fifth spinous ray 

 with this long slight bone. The thirty-sixth sp. ray being directly 

 between the third and fourth intersp. bones, leaves a space rather 

 more than one-fourth of an inch in width and thereby changes the 

 angle of the remaining intersp. fin bones. Thus the general angle 

 formed by the first intersp. fin bone with the spinal column, 

 which intersp. fin bone is attached to the thirty-third pair of ribs, 

 is thirty degrees, while that formed by the fourth intersp. bone 

 is thirty-seven degrees. 



4th. The fourth fin-ray is attached to the centre of the fourth 

 intersp. fin bone. 



5th. Same attachment to five. \ 



6th. " " " six. > intersp. fin bones. 



7th. " " " seven. J 



The 3rd, 4th, 5th, 6th and 7th fin-rays are thicker than the 

 others. 

 8th. The eighth fin-ray is not so strong as its anterior five rays, 



