CHAP. XIII.] 



DIGITS : CAT. 



319 



Right pes. The digits III, IV and V (Fig. 85, I) are 

 normal and are fashioned as right digits. The cuboid and external 



n> 



cu 



FIG. 86. Left inanus of Cat No. 472, shewing Condition IV of the rnanus. 

 cu, cuneiform. d l d 7 , digits numbered from the inside, m, magnum, sclu, 

 scapho-lunar. Tp, trapezoid. 



(From a specimen in Coll. Surg. Mus.) 



cuneiform (cb and ect. cu} are also normal. Internally to the ex- 

 ternal cuneiform there is a long flat bone which is grooved in such 

 a way as to divide it into three parts (c j ~ 3 ) and each of these bears 

 a digit. 



Of these digits, d 2 and d 3 have each three phalanges, but d l has 

 only two phalanges and may therefore be called a hallux. The 

 digits d* and d 3 are fashioned not as right digits but as left 

 digits, and their claws are thus retracted towards the internal side 

 of the second phalanges, which are hollowed out to admit of this. 



The bones of the hallux are not thus differentiated as right or 

 left, for the claw is not retractile. The navicular is enlarged in 

 correspondence with the presence of the fourth cuneiform element 

 and the astragalus and calcaneum are normal. (Fig. 85, 1). [Con- 

 dition III of the pes.] 



Left pes. This foot is almost exactly like the right. As in it, 

 the digits III, IV and V are normal and are left digits. Internal 

 to this are three digits, viz. a hallux and two long digits with three 

 phalanges which are both made as right digits. The bones of this 

 foot have not been cleaned. [Condition III of the pes.] 



Right manus. This is formed on the same plan as the manus 

 of the last animal, differing from it in details of the carpus, chiefly 

 in the presence of two separate trapezial elements. The four digits 

 on the external side, II V are shewn by their claws to be true 



