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Show 284 MESSRS. B. 0. A. WINDLE AND F. G. PARSONS ON [Nov. 3, flexores breves dislocated into plantar and dorsal interossei Man. The other authorities on the Elephant give us little help, and we must reserve the question for future investigation. Muscles of the Trunk. Serrati dorsales. - The anterior and posterior muscles can usually, though not always, be distinguished, and it is probably owing to the great difficulty in deciding how much was anterior and how much posterior that the great discrepancies in different authors' accounts have occurred. The origins of the two muscles are from the thoracic and anterior lumbar spines. The following are some of the recorded insertions of the anterior muscle :- Hippopotamus (1) 3 ribs. Pig (4) 3-8 „ Chevrotain (20) 2-9 (22) 3-12 „ Ox(35) 5-9 „ Sheep (42) 5-9 „ Antelope (55) 4-7 Horse (63, 65) 5-14 Hyrax (74, 75, 78) 4-20 Elephant (84) 5-8 ii ii • > j> The following are those of the posterior muscle :- Hippopotamus (1) 4-15 ribs. Pig (4) 8-14 Chevrotain (20) 9-12 Ox (35) 10-13 Sheep (42) 10-13 Antelope (55) 10-13 Elephant (84) 9-22 ii n In the Chevrotain (22) and Hyrax (74, 75, 78) the muscle formed one single sheet and it was impossible to distinguish anterior and posterior parts. The nerve-supply is from the posterior primary divisions of the thoracic nerves. Splenius capitis.-This muscle varies a good deal in different animals ; it rises from several of the anterior thoracic spines, but never seems to reach farther back than the 6th. In the Giraffe it is entirely absent according to Murie (XXXII.), while in the Camel (15, 18) it is so small as easily to escape notice. In the Ox (36) and Sheep (44) it is also very small. In the Hippopotamus (1) and Pig (4) it is fairly well marked, and in the latter animal Lesbres (V.) found it divided into two portions, one being inserted into the occipital crest, the other into the mastoid portion of the temporal. In ihe Elephant, Miall and Greenwood describe it (XXIX.) as bilaminar, while in the Horse (63, 65) and Hyrax (74, 75) it is well developed. Splenius colli.-In the Artiodactyla this muscle, when present, |
