362 PROF. K. VOX BABDELEBEX OX THE [A-P r - ' ~ 



From the pronator radii teres goes a muscular belly to the 

 radialis interims (comp. Bodentia and Carnivora). 



A muscle arises from the Pp. and is inserted into the metacarpal 

 I. (as in Carnivora) =Interosseus ? 



There is an extensor pollicis et prcepollicis. 



A very strong muscle is present on the Jiypothenar, arising from 

 the distal end of the pisiform and the tendon of the palmaris 

 longus. 



b. INSECTIVORA. 1 



The " pahnaris longus " gets its nerve only from the ulnaris, the 

 muscle being situated rather on the ulnar side and inserted into 

 the pisiform. 



The ulnaris intermits is also implanted in this bone (perhaps 

 there are two ulnares ?) 



c. RODENTIA. 



1. Sciurus abizoxexsis. (Plate XXI. fig. 4.) 



(Zool. Soc. Gardens.) 



Bone and pad of the Pp. are large, the thumb being small ; on 

 the Pm. a large pad. 



The palmaris longus has on the wrist an aponeurotic expansion 

 of triangular shape ; it is inserted into the Pp., Pm., the other pads 

 of the volar manus, and the sheaths of the digits. Xerve-supply 

 from medianus (from the ulnaris no branch being found). 



Very strong muscles are met with in the pad of the minimus 

 digit, connected with the palmaris longus and the ulnaris internus ; 

 the muscular fibres reach the Pp. JS T . ulnaris : the tendons of 

 theji. digit, sublimis (phalanx II.) are weak, those of the ft. profun- 

 dus (phalanx III.) are very strong. 



There is an extensor (or abductor) pollicis et prospotticis arising 

 from the ulna (comp. Herpestes). 



2. Bathyergits haritimus. 



On the Pp. and Pm. there are nail-like formations (comp. Pedetes 

 capensis). Its Pm. consists of two bones (P. Z. 8. 1889, p. 260) ; 

 there are also two muscles, one for each bone. Whether these 

 muscles be two ulnares interni or one of them be a palmaris longus 

 I cannot say. Both are supplied by the ulnaris nerve. 



On the -wrist there are five muscles : — (1) A superficial muscle 

 running obliquely from the Pm. to the Pp. and pollex, it continues 

 the supposed palmaris (or ulnaris int.); (2) a superficial muscle from 

 the Pp. to the thumb (nerv. medianus) ; (3 & 4) deep transverse 

 muscles on the carpal joints (nerv. ulnaris); (5) a deep muscle 

 between Pp. and pollex. 



Each digit has two " interossei " or deep short flexors. 



Extensor pollicis et prcepollicis longus runs obliquely from the 



1 My notes and sketches concerning Centetes and other Insectivora having 

 been lost, I can for the present give these few remarks only. 



