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Proceedings of the Royal Society 
tuberosity; from the inner part the ramus rises.* From the inner and 
lower surface of the tuber ischii the femur (51) descends. It is from 
the inner articulation in the fishes, instead of the external aceta¬ 
bulum in the human pelvis, that the relation between the tibia 
(52) and fibula (58) is altered. The fibula is articulated within the 
head of the tibia; the femur overlaps the upper spine of the 
head of the tibia. The external malleolus tibiae is very greatly pro¬ 
longed, and forms the great osseous sub-opercular cleft, while the 
internal malleolus fibulae is embedded in the skin behind the tarsal 
fin. 
The tarsal fin consists of calcaneum (55), astragalus (53), scaphoid 
(54). These Cuvier named radius and ulna, in which he was fol¬ 
lowed by Owen, &c. Anterior cuneiform and cuboid tarsals (56). 
The phalangeal fin rays (57). 
The mistaken homology of the pectoral fin for the anterior 
instead of the posterior extremity baffles all chance of correct 
homology, and I earnestly hope that all the living homologists will 
re-examine the subject, and adopt the system which I have wrought 
out for between forty and fifty years without succeeding to con¬ 
vince the anatomists. I put forth this final appeal of the oldest of 
living homologists who proposed an original scheme (my friend, 
Professor Grant, University College, London, introduced that of 
the brilliant but fanciful G-eoffroy St. Hilaire some years earlier), 
with the firm conviction that ere long, after I have retired, the 
scheme now proposed will be adopted. 
* Owen’s Nomenclature. 
50. Supra-scapula. 
51. Scapula. 
52. Coracoid. 
53. Humerus. 
54. Ulna. 
55. Kadius. 
56. Carpal. 
57. Metacarp-phalanges. 
58. Epicoracoid. 
Macdonald’s Nomenclature. 
50. Ischium. 
51. Femur. 
52. Tibia. 
53. Astragalus. 
54. Scaphoid. 
55. Calcaneum. 
56. Tarsal. 
57. Tarsal fin rays, 
58. Fibula. 
