402 DR. B. C. A. WINDLE AXU MR. F. G. PARSONS ON THE [Apr. 6, 



civetta (12, 13), Genetta (16), Heiyestes (22, 24), Canis famiiuiris 

 (31, 38, H9), Ursas arctos (47), C^. americanus (48, 49, 51, 52), 

 U. maritimus (45), Proci/on lotor (53), P.cancrivorus (57), ynsiia 

 (60. 60 rt), Cercoleptes (61), Galictis vittata (63), Mustda putorius 

 (65), M.foina (66, 67), J/eZfs (71, 72, 73), and iitira (74, 75, 76, 

 77, 78, 79). In the following animals tendons were only supplied 

 to the annularis and minimus: — Felis leo (1), in whiuh the extensor 

 minimi and the extensor quarti digiti are separate musc-les and lie 

 in distinct sheaths, Genettta (17), llerpestes (23), ProteJts (25), 

 Hycena striata (26), i/. crocuta (29), and Catiis aureus (41). In 

 Ictonyx libi/ca (70) two tendons were found, but these went to the 

 medius and annularis. In Cyncdu7-us (9) B.o^s describes only one 

 tendon to the second phalanx of the fifth digit, but he says that 

 there is also an " e.xtensor minimi digiti tertii " rising from the ujjper 

 fifth of the radius and passing through a separate sheath of the 

 annular ligament to the 1st phalanx of the minimus (IV.). 



Extensor carpi ulnaris. — This muscle has the human attach- 

 ments and is extremely constant. The only point of interest 

 which we have come across is that Meckel (XXXIX.) describes it 

 as double in the White Bear ; it must be borne in mind, however, 

 that in the Bears the flexor carpi ulnaris is double, so that there 

 may be some confusion between the two muscles. 



Supinator hrevis.- — This consists, as in most mammals below 

 the Primates, of one layer, which lies superficial to the posterior 

 interosseous nerve ; it rises from the orbicular and external lateral 

 ligament, and in some cases reaches as high as the external condyle. 

 It is inserted into the outer side of the radius, reaching a greater 

 distance in some animals than in others. In the Felidje our 

 records of this muscle are very scanty, but it seems usually to 

 occupy the upper third of the forearm. In the Viverridaj it 

 occupies the upper third in Cryptopiroda (10) and Genetta (18) ; in 

 Viverra civetta (12,13) it is merely described as well marked, while 

 in llerpestes (22, 24) it was found in the upper two-thirds of the 

 forearm. In the Hyaenidae it seems to be only slightly developed 

 (26, 28, 29), and "Watson (XIII.) does not rnention 'it at all in 

 his description of Proteles. In the Canidse, Meckel (XXXIX.) 

 describes it as occupying the upper half of the forearm, but in 

 other specimens (31, 39) it did not extend so far down. The 

 Ursidae are remarkable lor the great development of the supinator 

 brevis ; in Ursus maritimus (45) it reaches to within Ik inches of 

 the lower end of the radius, while in U. americanus (48, 49, 52) it 

 occupies the upper two-thirds to three-quarters. Among the 

 ProcyonidfB it covered the upper half of the radius in Procyon 

 lotor (53, 56) and Nasua (60), the upper third in P. lotor (54) and 

 Cercoleptes (61). Allen (XXVI.) describes it as being pierced by 

 the posterior muscular branch of the musculo-spiral nerve (pos- 

 terior interosseous ?), an arrangement which was not present in 

 our specimen of Procyon and which we have never seen in any 

 other Carnivore. In the Mnstelidse the length of the muscle 

 varies. Macalister describes it as well marked in Galictis harhara 



