IgOi.J THE MUSOLEiri OF THE L'lSUULAXA, 683 



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

 the Brocket (28) the pL'ice of the muscle was takeu by a slip of 

 what appeared to us as dorsi-huuieral panniculus coming ofE from 

 the main panniculus over the teres major and being inserted into 

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

 wih the panniculus in 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 ]n'esent. 



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

 axillary border of the scapula, but, Le?-'bres (V.) found it connected 

 with the latissimus. 



In the Ox (36) at the E.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 belov/. 

 In the Antelope (49) it was altogether absent. 

 In the Tapirid83 (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-fig. 90). 



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

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

 origin only ; while in 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 an ill-developed latissimus 

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

 is feeble and 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 Hippopotamidse (1, 3), Suidse (4, 6, 8, 11, 

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

 In the Traguhdfe (20, 21), Camelid^ (18), Cervidse (25, 27, 28), 

 (liraflSdee (29, 30, 31), Bovidte (32, 33, 35, 38, 39, 40, 41, 43, 44, 

 45, 46, 49) \ TapiridsB (54, 55), Equidge (56, 57, 58, 60), and 

 Elephantidae (74) there is no capitis. 



The rhomboideus colli et thoi-acis are usually blended into one 

 sheet, which stretches from the middle of the Ugamentum nuchae, 

 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 out that the rhomboid sheet is 

 strengthened on its deep surface by an elastic lamina, but this is 

 not found in other Ungulates. 



^ Vrolik (VIII.) found a I'hombuideus capitis in the G-nu, 



