REPTILIA : LIMNOSCELIS 



39 



touches the intermedium. The ventral surface of all three of these 

 bones is flattened, the dorsal more rounded, that of the radiale 

 obsolete. Especially remarkable is the fact that all of these proxi- 

 mal carpal bones save 

 the pisiform are very 

 small, smaller than in 

 Diadectes even, and 

 much smaller than in 

 other known Permian 

 reptiles. 



The remaining bones 

 of the right foot were 

 found nearly all con- 

 nected, for the most 

 part in the relations of 

 the living animal. The 

 foot had been slightly 

 twisted in fossilization, 

 disturbing somewhat 

 the relations of the 

 metapodials. Of the 

 phalanges all were found 

 in association save two 

 terminal ones, the distal 

 phalanges somewhat 

 confused in the three 

 middle fingers. The 

 three distal carpal bones 

 were found in the posi- 

 tions shown in the fig- 

 ure, but there were no 

 traces of others, and 

 they could have hardly 

 escaped notice had they 

 been fossilized with the others. Evidently these nodular bones 

 represent the centrale and the third and fourth carpalia. Fortu- 

 nately the bones of the left foot were found in the matrix in as 



V 



IV 



III 



FIG. 13. Limnoscelis paludis. Right front 

 leg, dorsal side, two-fifths natural size, re, radiale; 

 ?', intermedium; ue, ulnare; p, pisiform; I-V, first- 

 fifth digits. 



