GEOLOGICAL SURVEY OF THE TEREITORIES. 599 



ridge along the middle externally, aud the distal part proximally. A 

 broad groove marks the upper face of the epiphysis, where the shaft 

 has a vertical inner face. 



Measurements. 



M. 



Length humerus, (axial) 0.270 



Diameter head to bicipital groove 037 



Length along crest outer tuberosity, (about) 052 



Transverse diameter, distally 046 



Antero-posterior diameter, inner condyle 042 



Width olecranar fossa 020 



Length ulna 260 



Depth olecranon, distally 027 



Depth at coronoid process 025 



Depth of distal end 019 



Depth at middle shaft 019 



Length radius , 200 



Width of head 036 



Depth of head 021 



Width shaft at middle 021 



Width near distal end, (greatest) 037 



Width distal articulation 030 



The elements of the caroms are distinguished for length, aud for re- 

 duction of width. The anterior faces of all are considerably longer 

 than broad, but the longest faces of the cuneiform, scaphoid, and trape- 

 zoides are antero-posterior. The facets are as usual in the-carpus ; sca- 

 phoid A^; lunar^ 5 cuneiform f; trapezium i ; trapezoides i magnum |^ 5 

 unciform |. The cuneiform has a rather L-shaped external face. The 

 pisiform has two proximal facets aud is enlarged and thickened distally ; 

 pressed inward, it reaches the scaphoid. The trapezium is a small 

 .subdiscoid bone with convex outer face. The magnum is as broad as 

 deep in front, where its surface is swollen ; it is produced behind into a 

 spatulate decurved hook. The unciform has a narrow sub-acute hook 

 behind, with wide base. 



Measurements. 



■ . M. 



Width of carpals of first row together 0. 044 



Width of lunare, outer face 016 



Depth of lunare , outer face 020 



Depth of cuneiform, outer face 020 



Width of cuneiform, outer face 020 



Length of pisiform, outer face 030 



Depth distally, outer face 014 



Width three carpals of second row 038 



Width magnum, outer face 015 



Depth magnum, outer face 014 



Depth unciform, oater face 017 



WidSi unciform, outer face . 020 



Length unciform, antero-xjosterior -021 



Length magnum, antero-posterior 029 



Total length of carpals 040 



The metacarpals are quite slender. The first only is wanting ; the 

 third is rather stouter than the others, while the fourth is considerably 

 the most slender. Its distal extremity is oblique, with prominent median 

 keel, which is wanting on the superior aspect. The x)roximal facets of 

 these bones are respectively (2d) 2, (3d) 2, (4th) 1, (5th) 1. There is a 

 short, shallow groove near the proximal end of !N'o. 3. The phalanges 

 corresponding are lost in the specimen. 



