6*4 MESSRS. B. 0. A. WHttXLE AMj f. G. PARSONS ox [Dec. 1 7, 



In the Camel (18) and G-iraffe (30, 31) the rhomboids are very 

 small aud only reach the second or third thoracic spine ; indeed, 

 in the latter animal Jolv and Lavocat (XII.) deuy its existence. 

 The nerve-supply of the thoracic portion of the muscle is from 

 the 6th cervical in the Horse (57) and Hyrax (0*3); in the latter 

 animal the rhomboideus capitis et colli was supplied by the 4th 

 aud possibly 5th cervical. 



Subdavius and Sterno-Kaptdarit. — As the clavicle is always 

 wanting, the subclavius, if it is present at all, is always continued 

 from the junction of the first or more ribs with the sternum to 

 the fascia over the supraspiuatus. It is present in the Hippo- 

 potamida? (1,3). Suida? (4, 6, 7, 8, 11, 12, 13, 14), Tragulidae (21 1 

 (not mentioned by KiuberL r I 20)), Cervidse (24, 27), Tapimke (50, 

 52, 54, 55), Equidee (57, 58), Rhinoceros (64), Procaviidae (67, 68), 

 and Elephantidse ( 72, 76). 



In the Tragulidie aud Cervidse the muscle is small aud possibly 

 ofteu absent, as no mention is made of it iu many of these animals. 



In the Tapiridae, Equidae, and Procaviid* the origin is from the 

 sternum and first three costal cartilages. 



In the BovidaB the muscle may be present or absent, but if it is 

 present it is always very small. Chauveau (II.) found it iu the O.x 

 (32), but not in the Sheep (39) or Goat (47). Lesbres (V.) says 

 it is present in Ruminants as a small bundle which joins the 

 cephalo-humeral at the clavicular intersection, while Bourgelat 

 (quoted by Lesbres) describes it as absent, and Rigot (also quoted 

 by Lesbres) as fused with the pectoralis quartus. In our own 

 dissections it was fully developed though small in the Antelope 

 (49), rudimentary in the Fat-tailed Sheep (43), and altogether 

 absent in the Mouflon (45). 



AVe have unfortunately no records of it iu the Camelidre and 

 Giraffida?, but if it had been at all well marked its presence would 

 probably have been noticed. In consulting the literature of this 

 muscle the reader should bear in mind that it has many synonyms 

 and that ouly recently has it been recognized as a distinct muscle ; 

 it is most otteu found with the description of the pectoral group. 



The nerve-supply comes from the 5th and 6th cervical in the 

 Pig (9) and Peccary ( 14), from the second root of the phrenic in 

 the Pig (8), from the phrenic and 7th cervical in the Duiker- 

 bok (49). 



Levator angvli scapula and Serratus magnus (Serrate* centralis 

 roll), et thoracis). — The following origins of these muscles are 

 recorded by ourselves and other observers; — 



Cervical 

 LnuwrerM proceed. Rib-. 



Hippopotami;- ( 1 ). 17. 1-8. 



Hippopotamus >'■'• >. . . 1-11. 



Pig (4) 1-7. 



Pig (8. L-7. 



Pig (9; 17. 1-6. 



