184 NOTES ON THE SALMO SALAR SPECIMEN — MORROW. 



another process having a cartilaginous attachment to it, this 

 process is somewhat irregular in shape and rough upon its edges 

 for the attachment of the tissue which unites it to the bones of 

 the skull. It penetrates beyond the marginal point of the pre- 

 operculum and its tissues are connected with the edge of the 

 supporting bone above the fleshy cheek behind the eye, in 

 shape it is nearly straight, slightly curved laterally ; from its 

 junction with the supra-clavicle to its point it is about 

 If inches in length ; on the anterior edge of its projection or 

 root this small bone is attached by cartilage to the bone which 

 supports the operculum. To enable you to understand this junc- 

 tion I have cut off a small portion of bone from the skull leaving 

 the cartilage entire. Let us turn this bone over and look at its 

 inner face, at the point of junction of the small bone already 

 noticed as supporting the upper portion of the supra-clavicle and 

 diverging from it dorsally in a line with the centre of the root 

 of the small or supra-clavicular bone, is a short bone having a 

 very strong ligament connecting it with the skull bone at the 

 base of the brain (it is this short bone which makes in the Cod 

 fish the forked supra-clavicular bone, but it differs from the sal- 

 mon inasmuch as it is throughout a bone and is not a representa- 

 tive of the process in the salmon which springs from the supra- 

 clavicle), a pin in the skull of the large skeleton marks the 

 point of connection. 



Of the middle piece or inter-clavicle there need not much be 

 said, it is as the supra-clavicle thin and flat and its upper end is 

 inserted under the edge of the supra-clavicle, on its anterior face 

 for nearly § of an inch, posteriorly it has a thickened striated 

 edge ; its lower extremity which is flat, thin and oval-shaped over- 

 laps and is attached to the clavicle, presenting the appearance of 

 nearly concentric plates, the growth of which has taken place 

 apparently from the inner side. In specimens freshly taken this 

 bone has considerable freedom of motion upon the clavicle. 

 The Clavicle, Coracoid, Scapula, &c. 



It is almost impossible for me to describe the shape of the 

 clavicle and the bones connected with it, but I will make the 

 attempt. 



