264 



MESSRS. B. C. A. WINDLE AND F. G. PARSOA'S ON [Nov. 3, 



Family RniNOCEROTiDiE. 



70. Rhinoceros sumatrensis. Beddard & Treves (XX.). 



71. „ ?sp. Haughton (XXL). 



72. „ „ Owen(XXIL). 



73. „ „ Macalister (XXIII.). 



Division B. SUBUNGULATA. 

 Family PROCAViiDiE. 



74. Procavia dorsalis (Hyrax). Mivart & Murie (XXIV.). 



Mioscles of the Gluteal Region. 



Ectogluteus {Gluteus maximus), — In the Ungulata the muscular 

 sheet formed by the ectogluteus, femoro-coccygeus, and biceps is 

 less separable than in any other order we know, and the difficulty 

 of deciding how much of it is to be called ectogluteus is added to 

 by the fact that the femoro-coccygeus or agitator caudse has quite 

 lately been recognised as a separate muscle, and so appears only 

 in papers of recent date. The origin of the muscle is in all cases 

 from the spines of the sacral and anterior caudal vertebrae, and 

 sometimes from the iliac crest ; the most interesting thing about 

 its insertion is that among the Artiodactyla, in which there is no 

 third trochanter, it ends entirely in the fascia of the outer side 

 of the thigh and has no bony insertion into the femur. This is 

 the case in the Hippopotamidse (1, 3), Suidje (4, 5, 8, 11, 13, 14), 

 Camelidse (15), Tragulidaj (22), Cervidte (26, 27, 29, 30), and 

 Bovidaa (35, 36, 38, 39, 41, 42, 43, 47, 50, 51, 52, 54, 55). In the 

 Perissodactyla, in which a large third trochanter is present, the 

 ectogluteus is inserted into it, though it did not seem to us that 

 the muscle in the odd-toed Ungulates was usually better developed 

 than in those with an even number of toes. This insertion into 

 the third trochanter is recorded in the Tapirid^ (58, 61, 62), 

 Equidse (63, 65), and Rhinocerotidaj (71). Among the Subungu- 

 la,ta the muscle was certainly inserted entirely into the fascia in 



