MYOLOGY OP ANOMALURIJS. 323 



The Flexor Sublimis Digitorum divides into three tendons for 

 the index, medius, and annularis. There is no slip for the 

 minimus ; and 1 have called attention to this arrangement * as 

 constantly occurring iu the Myomorpha. 



In the Flexor Carpi Ulnaris both olecranal and condylar heads 

 are present, they join high up, and the usual insertion into the 

 pisiform bone occurs. 



The Flexor Profundus Digitorum has the five parts of the 

 typical muscle — 1, radial ; 2, ulnar ; 3, radio-eoadylar ; 4, ulno- 

 condylar ; 5, centro-condylar. The latter joins the rest of the 

 muscle about the wrist-joint. 



The Lumbricales are peculiar ; there were six in each hand 

 in my specimen. Oue rose from each side of the two middle 

 tendons, one from the ulnar side of tlie tendon to the index, and 

 one from the radial side of the minimus tendon. They were too 

 small for the nerve-supply to be made out with certainty. 



The Pronator Quadratus is only attached to the lower quarter 

 of the forearm. The Sciuroraorpha are remarkable for the feeble 

 development of this muscle. 



The Supinator Longus is absent. Up to the present I have 

 looked upon the absence of this muscle as a myomorphine 

 characteristic. 



The Extensor Carpi Padialis, Extensor Carpi Ulnaris, and 

 Extensor Ossis Metacarpi Pollicis f have the usual mammalian 

 attachments. 



The Extensor Longus Digitorum divides into four tendons, as in 

 all Sciuromorpha ; often, in the Myomorpha, the slip to the 

 minimus is absent. 



The Extensor Minimi Digiti divides for the annularis and 

 minimus. 



The Extensor Indicis only goes to the index. 



The thumb is too rudimentary to require any short thumb- 

 muscles. 



The first row of palm-muscles consists of an Adductor Indicis 

 and Adductor Minimi Digiti, which have the usual rodent dispo- 

 sition. Deep to these is a layer of double-headed Flexores breves, 

 one for each of the four digits, and no muscles dorsad to these 

 were found. 



* P. Z. S. 1896, p. 188. 



t The poUex is rudimentary. 



