1901.1 THE ML'SCLES OF THE C5GULA.TA. 683 



the Deer (25) the origin was from the latissimus dorsi, but iu 

 the Brocket (28) the place of the muscle was takeu by a slip of 

 what appeared to us as dorsi-buineral patmiculus coming off from 

 the main pauuiculus over the teres major and being inserted into 

 the iuner side of the olecranon. We also found some connection 

 wi h the pauuiculus iu the Pig (11) ; and on this account have 

 asked ourselves whether, in spite of the nerve-supply always 

 coming from the musculo-spiral or circumflex, the dorso-epi- 

 trochlearis might not originally be a specialized portion of the 

 panniculus, but we do not feel justified in doing more than making 

 the suggestion at present. 



In tlie Bovida?, Bronn (VI.) says that the muscle rises from the 

 axillary border of the scapula, but Lesbres (V.) found it connected 

 with the latissimus. 



In the Ox (3(J) at the R.C.S. Museum it rose from the latissimus 

 and teres major, and so it did in our specimens of Sheep (43, 45), 

 but it was very feeble and blended with the triceps below. 

 In the Antelope (49) it was altogether absent. 

 In the Tapiridae (52, 53, 55) it is very well developed and rises 

 fleshy from the latissimus. 



In the Horse (57) and Ass (61) from the axillary border. 

 In the Hyrax (67) from the infraspinatus and in (68) from 

 there and slightly from the latissimus dorsi (see text-tig. 90). 



In the Indian Elephant (74) from the latissimus aud the axillary 

 border of the scapula near the augle ; in (79) from the latter 

 origin only ; while iu the African species (78) it was large and 

 rose entirely from the latissimus dorsi. 



The generalization which we would make from the preceding is 

 that the Ungulates have as a group au ill-developed latissimus 

 dorsi, and that as an effect or coincidence the dorso-epitrochlearis 

 is feeble aud tends to shift its upper attachment, but that in 

 the Tapirs, where the latissimus is very well developed, the 

 dorso-epitrochlearis is also large and has the usual mammalian 

 attachments. 



Rhomboids. — In the Hippopotamidae (1, 3), Suidae (4, 6, 8, 11, 

 13, 14), and Procaviidae (67, 68, 71) the capitis is well developed. 

 In the TragulidsB (20, 21), Camelidsa (18), Cervidae (25, 27, 28), 

 Giraffidae (29, 30, 31), Bovidae (32, 33, 36, 38, 39, 40, 41, 43, 44, 

 15, 46, 49) \ Tapiridae (54, 55), Equids (5Q, 57, 58, 60), and 

 Klephantida? (74) there is no capitis. 



The rhomboideus colli et thoracis are usually blended into one 

 sheet, which stretches from the middle of the ligamentnm nucha/. 

 From the fourth to the seventh thoracic spines, though in Hyrax 

 (67, 68) it reaches the tenth. The insertion is into the ventral 

 surface of the suprascapular cartilage where that exists, In the 

 Horse, Lesbres (V.) points oul that tin- rhomboid .sheet is 

 itreogthened on its deep surface by an elastic lamina, hut this is 

 not found in other I 'ngiilates. 



\ rolik VI II. ) found a rhombuideun capitis in the Gnu. 



