400 DR. B. C. A. WINDLE AND MB. F. G. PABSONS ON THE [Apr. 6, 



it as being very large, aucl says that it is inserted into the plate- 

 like process of the radius. In Proteles (25) it resembles the same 

 muscle in the Hya?nidae and is attached to the whole length oE 

 the bones. Among the Hysenidag it occupies the whole length of 

 the forearm in Jli/cna striata (26, 27) and //. vrocitta (29). In 

 the Canidffi all w riters agree in saying that the pronator 

 (juadratus of the dog occupies the whole length of the fore- 

 arm, and we have veriGed the statement (^1). The same 

 arrangement is found in L'anis aureus (41), C. vulpes (42, XXIII.), 

 C. lupus (XXIII.), and Lycaon pictus (44). Among the TJrsidae 

 the muscle only occupies the lower third of the forearm in Ursus 

 arctos (47) and U. americanus (48, 49, 50, 51). In the Proc}'- 

 onida3 it was found in the lower two-thirds in Proct/on lotor (53) 

 and P. cancrivorus (57), but Allen (XXVI.) describes it as occupv- 

 ing half the forearm in the former animal (54). In Nasua (58, 

 (50 a) and Cercolept.es (61) it was only present in the lower third, 

 though Perrin (XXIX.) describes it as taking up the lower two- 

 thirds in the latter. Among the Mustehdie the muscle occupies the 

 whole forearm in Mustela putorius (65); the lower half in Galictis 

 viitata {63), Lutra cinerea (78), and L. inilgar is (74); the lower 

 third in Meles (71) and letony.v (70). From the foregoing it will 

 he seen that in the Felidse the pronator quadratus is attached to 

 the lower half of the ulna and radius, in the Cauidae and Hyaenidse 

 to the whole length, in the Ursidse to the lower third, while in 

 the Viverridse, ProcyonidiB, and Mustelidse it is A'ariable. 



Supinator longus. — This muscle rises from the external supra- 

 condylar ridge of the humerus for a variable extent, in some cases 

 reaching as high up as the surgical neck ; it is inserted into the 

 radial side of the lower end of the radius. Among the Felidae it 

 is present in Felis leo (1), F. tigris (3), F. j^ardus (4, XXXIX.), 

 F. catus (domestic) (6, 7, 7 a), F. catus (wild) (XXXIX.), but in 

 Cyncflurus (9) it was not found. In the Viverridse it was found 

 in Cryptoprocta (10), Viverra civetta (12, 13), T'. malaccensis (15), 

 Genetta tv/rina (16), where it sends an expansion to the dorsal 

 carpal ligaments, fr. tigrina (17), Parado.rurus typus (19, 20), Her- 

 pestes uepKilensis (23), and //. griseits (24). In Heiitiyalea (XI.) it 

 is also present and is attached to the plate-like process of the 

 radius. In Proteles (25) it is absent. Among the Hyteuidse it is 

 absent in H. stnata (26, 27, 28), and is a mere vestige in H. crocuta 

 (29). AV'ith regard to the Canidse we have had some little 

 difficulty in following the accounts of other writers. The muscle 

 is certainly absent in the following four dogs: 31,34,36,38. 

 In one specimen (37) it was absent on the left, rudimentary on 

 the right. In another specimen (35) it only weighed 1*07 grs., 

 and must therefore have been very feebly marked. 



In a dog described by Haughton (32) the muscle is said to be 

 present, but he states that there is only one extensor carpi radialis, 

 which is inserted into the little and ring fingers ; in this case we 

 cannot help suspecting that the muscle described by him as supinator 

 longus was really the other extensor carpi radialis. In Lymon 



