330 PROF. H. G. SEELET ON THE [May 1900, 



radius, which is not seen in the Bain slab, twists round the ulna, 

 and is prominent, showing something of its truncated distal ex- 

 tremity, which might have been mistaken for a large carpal bone 

 if the Murray slab only had been known. Its extremity is rather 

 more than k inch wide. The forearm is 3§ inches long. 



The hand is bent backward so as to display its upper surface, and 

 is a beautifully sharp impression of the 



Fig. 3. Hand of Eury- phalangeal bones. But a large ovate area 



°' carpus Oweni (about over the car P us and metacarpus has the 

 " nat. size). appearance of being covered with a patch 



of armoured skin, in which the granules 

 seem to be thickly grouped as though 

 they were in contact with each other. A 

 similar granular condition of the bones 

 5jf S^j / 1 of the forearm was suspected by Owen 



^LC"^ JQJ a to be indicative of the dried skin. The 

 granules are very distinct on the under- 

 side of the humerus, especially at the 



wm 



yS proximal end, and appear to indicate 



that the front of the animal was thus 



g3 protected. This condition is probably 



%r most comparable with the condition of 



the limbs in snapping turtles and some 



tortoises, in which I have found bony 



granules beneath some of the horny tubercles. 



The specimen shows the outer distal carpal bone, which is 

 inch long, longer than wide, concave at the sides, compressed 

 superiorly and truncated distally, forming a slight talon on the 

 inner side of the fifth metacarpal bone, with which it articulates. 

 Another carpal is above the fourth metacarpal bone, but these are 

 the only carpal bones which are not obliterated by the covering 

 dermal armour. 



Only the three outermost metacarpals are shown. They are 

 well defined by their forms, which are elongated, and transversely 

 expanded at the distal and proximal ends. The fifth bone is less 

 expanded at the proximal end, where the articular surface is convex 

 from front to back. The wide distal ends of the fourth and third 

 metacarpal bones show in each a triangular impressed area just 

 above the terminal articular surface. The distal extremity of 

 the second metacarpal is only indicated, while the first appears 

 to be a massive bone about \ inch long, and therefore shorter 

 than the other metacarpals, which is shaped like a digital phalange, 

 only larger, and is parallel to the other bones. It appears 

 that the carpus occupies a depth of 1 inch and a breadth of 

 1| inches. The metacarpal bones diverge very slightly as they 

 extend forward, so that the transverse measurement over their 

 distal extremities is 2 inches, while the length of this segment of 

 the limb is about f inch in its longest part. 



The bones of the phalanges of the digits are short, broad, strong, 

 with the articular ends well defined. They are all in close contact, 

 in a way that could not have been inferred from the previously- 



