180 NOTES ON THE SALMO SALAR SPECIMEN-—MORROW., 
fin-rays are attached. The outer head of the transverse ridge 
projects a little beyond the lateral ridge, the space so formed 
being filled with cartilaginous matter from which springs 
ligamentous attachment running some distanee along and tying 
this bone with the muscles of the belly. On the inner edge 
of the bony blade and attached to the cartilage on its anterior 
edge, strong fibrous tissue passes enveloping the blade as well as 
the anterior ends of the lateral ridge, from thence passing to the 
general muscular tissue. A similar attachment passes posteriorly 
from the cartilage between the pelvic bones, having attachment 
to the inner ends of their transverse ridges, with divergent 
connections to the integument covering the rays immediately 
under the point where the inner fin-rays appear upon the surface 
of the fish, from thence continuing some distance as a strong 
band down the centre of the belly. The pelvic bones are not 
always parallel with a line drawn through the centre of the belly, 
but are occasionally somewhat distorted, that is each forming a 
different angle with such central line. 
The ribs from and including No. 15 & 22 are shorter in pro- 
portion than the others; this is in order to allow for the insertion 
of the pelvic bones, thus preserving the line of beauty. The space 
so afforded by the shortening of these ribs is 4 inches in length ; 
(that is from the end of 14 to 22,) the length of the pelvic bones 
being 3; inches, and from them to the extreme posterior end of 
the long fin-ray is 3} inches, making a total length of the fins 
and their attachments 63 inches average, allowing for the over- 
lapping of the fin-rays upon the pelvic bones. It must however be 
borne in mind that the fin-rays owing to their curves, are of 
eccentric lengths, there being a difference in the measurements 
as they are taken from the dorsal or ventral aspects; in the 
lengths above I have taken the dorsal aspect in a straight line (not 
round the curve of the ray), the measurement of the ventral 
aspect of the same ray is 3; inches. . 
The ventral fins each contain 9 rays and each fin has a ven- 
tral appendage, in this case they are 1; inches in length. 
ist. The first or outer ray divides at 1{inches from its attachment 
to the pelvic bones (that is visibly); on its ventral aspect it is at- 
