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Show 264 MESSRS. B. C. A. WINDLE AND F. G. PAESONS ON [Nov. 3, Family RHINOCEROTID^E. 70. Rhinoceros sumatrensis. Beddard & Treves (XX.). sp. Haughton (XXL). Owen (XXIL). Macalister (XXIII.). Division B. SUB UNGULATA. Family PROCAVIIDJE. 74. Procavia dorsalis (Hyrax). Mivart & Murie (XXIV.). 71. 72. 73. n ii ii ?g n n 75. 76. 77. 78. ii n n n capensis. ? sp. ii n Brandt (XXV.). George (XXVI.). Meckel (VIL). Family ELEPHANTID^E. 79. Elephas indicus. Anderson (XXVII.). 80. „ „ Mayer (XXVIII.). 81. „ „ Miall & Greenwood (XXIX.). 82. „ ., Watson (XXX.). 83. „ „ Young (XXXI.). 84. ,, ,, Cuvier et Laurillard (I.). 85. ,, ,, Paterson & Dun (unpublished). 86. ,, africanus. R.C.S. Museum. Muscles 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 caudae 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 vertebra?, 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 Hippopotamidae (1, 3), Suidaa (4, 5, 8, 11, 13, 14), OamelidsB (15), Tragulidae (22), Oervidae (26, 27, 29, 30), and Bovidse (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 Tapiridse (58, 61, 62), Equidaa (63, 65), and Rhinocerotidaa (71). Among the Subungu-lata the muscle was certainly inserted entirely into the fascia in |