396 Proceedings of the 



conjoined body into three portions by lines — y lateral opening of 



the Y-shaped canal — I, e, £ foramina for nerves. 

 Fig. 4. a Coracoid bone — c radio-ulnar bone — b these bones united, and the 



two carpal bones in the position which they occupy when the fin 



lies close to the body. 

 Fig. 5. The hyoid arch — a basihyal — b epihyal — c ceratohyal — d stilohyal 



bone — e pterygo-tympanic range — / lower jaw — g urohyal bone. 



The ligaments are shown by which the hyoid arch is hung. 

 Fig. 6. The pelvic bones. 



Fig. 7. Two posterior trunk and two anterior caudal vertebras. 

 Fig. 8. Terminal caudal vertebrae. 



Plate XXI. 



Fig. 1. Profile view of the bones of the head and modified vertebrae. (For the 

 letters and numbers see above.) 



Fig. 2. View of muscles on the abdominal aspect — a pectoralis muscle — b, b 

 recti muscles — c, c anterior pelvic muscles — d ligament supporting 

 the pelvis — e, f depressor and levator of the pectoral fin — g space 

 uncovered by muscle, the anterior part of which corresponds to the 

 fossa which contains the lateral lobule of liver. 



Fig. 3. View of muscles on the dorsal aspect — a pectoralis muscle — b space 

 uncovered by muscle between the pectoralis and anterior part of 

 the great lateral muscle, with the transverse process of the third 

 vertebra seen projecting under the membraneous covering — c, d 

 masseter muscle above and below the eye-ball — e attachment of 

 the other masseter to the lower jaw — /muscle passing from the 

 tympanic range to the supra-maxillary bone — g levator of the oper- 

 culum w, — i i the eyeballs — k coracoid bone and pectoral fin — y 

 supra-temporal cartilage — z cartilaginous clavicle. The muscles 

 from the mastoid bone to the operculum and coracoid bone are 

 seen crossed by the last two structures. 



Fig. 4. View of the viscera — a stomach — b glandular duodenum — c rectum — 

 d liver partially raised, and the right lateral lobule exposed, 

 while the left is hid in the fossa in which it lies — e electric nerve — 

 / gall-bladder — g bile-duct — h swimming bladder — i, i kidneys — 

 k, k ovaries — I lobulated urinary bladder. 



Fig. 5. Swimming bladder, with pneumatic duct. 



IV. Note on an Artesian Spring, ivhich lias lately appeared on the Banks 

 of the Almond, near Wester Whitburn, Linlithgowshire. By Andrew 

 Taylor, Esq. 



The spring was found as a bore was being prosecuted in a 

 field on the banks of the Almond, opposite the Red Mill, and 

 midway betwixt East Whitburn and Blackburn. When nearly 

 17 fathoms depth had been reached, water copiously gushed 

 out of the bore-hole, and was conducted in a tube 7 feet above 



