60 PROP. W. B. BENHAM ON THE OSTEOLOGY [Feb. 4, 



millim. 

 Greatest height (from the highest point of the 



superior border to the anterior margin of the 



glenoid) 164 



Length of the posterior border 107 



„ „ anterior „ 159 



Greatest breadth (in a straight line from anterior 



to posterior angle of the superior border) 184 



Breadth immediately above acromion 83 



Length of glenoid cup 46 



Breadth „ „ 31 



Distance from the antero-superior angle to origin 



of acromion 76 



Length of acromion 48 



Vertical height (near root) of acromion 35 



Distance from posterior margin of glenoid to tip of 



acromion 101 



Length of coracoid (from anterior margin of glenoid) 47 

 Distance from posterior margin of glenoid to end 



of coracoid 84 



Height of coracoid (at root) 22 



The Pectoral Lionh. 



The limb has been moi-e or less imperfectly figured by the 

 various authors — a photograph of the "restored" limb having 

 been added to the second edition of Wall's memoir, to replace an 

 inaccuracy in the figure of the entire skeleton. 



In this photograph, the restored carpals (which were gathered 

 from the sand and pieced together) are fairly accurately placed ; 

 but the cartilages, having been repi-esentecl by some artificial 

 filling, do not show their chai-acteristic independence. Wall 

 describes " seven " carpals, but it is evident from later researches 

 that the "two linear transverse bones" are merely the distal 

 epiphyses of the radius and ulna, at the ends of which he locates 

 them ; the remaining 5 are accurately described in the text. The 

 photograph is a truer representation of the hand than the woodcut 

 accompanying Krefi"t's paper. 



The figure given by Van Beneden & Gervais is also incomplete. 

 It seems therefore worth while to present a complete figure of 

 the entire limb (PI. IV. fig. 7) showing all the cartilages and 

 bones in their true position. 



The humerus is provided with a small deltoid ridge, 15 mm. 

 in length and 5 mm. in height. The head and tubercle, as well 

 as the distal epiphysis, are embedded in cartilage, but are firmly 

 united to the shaft of the bone. But the epiphyses of the radius 

 and ulna are not as yet united, though they can be felt at each 

 end by a needle thrust into the cartUage. 



The proximal epiphysial cartilage of the ulna is prolonged down- 

 wards as a spur, which represents the bony olecranon of Physeter. 

 This cartilage is indicated in the figure given by Krefi"t, and in 

 the photograph of Wall's specimen, as a small bony process. In 

 my specimen there is no ossification in this cartilaginous olecranon. 



