PEOCEEDINGS 



OF 



THE ROYAL SOCIETY. 



June 17, 1869 (continued). 



X. " On a Group of Varieties of the Muscles of the Human Neck, 

 Shoulder, and Chest, with their transitional Forms and Homo- 

 logies in the Mammalia." By John Wood, F.R.C.S., Examiner 

 in Anatomy at the University of London. Communicated by 

 Dr. Sharpey, Sec. R.S. Received June 17, 1869. 



(Abstract.) 



The muscular varieties described by the author in his paper comprise 

 the occipito-scapular, the levator claviculce, and the cleido-occipital, 

 among the muscles which elevate the scapuloclavicular bone- arch ; the 

 sterno-scapular, the sterno- clavicular, and the scapuloclavicular, of those 

 which depress it ; and the supracostal, placed upon the upper part of the 

 thorax. 



The human occipito-scapular was first observed and described by him in 

 the Proceedings of the Royal Society in 18G7. Since that time various 

 developments of muscular slips connected with the splenii, levator anyuli 

 scapula, and serrati have been observed, and are described and figured as 

 a series of varieties transitional from the occipito-scapular behind to the 

 levator claviculce in front of the neck. The homology of the occipito- 

 scapular with the levator scapulce minor vel posterior of Douglass, the 

 rhomboideus capitis, rhombdide anterieur of Meckel, and the rhombo'ide 

 de la tete of Cuvier, is traced in the different orders of the Mammalia, 

 from direct observation, in the following animals, viz. the Bonnet-Monkey, 

 the Hedgehog, Mole, Dog, Cat, Badger, Weasel, Rabbit, Guineapig, Nor- 

 way Rat, and Squirrel, of which drawings from dissections accompanied 

 the paper ; and also from various authorities in reference to a considerable 

 number of other animals. 



The levator claviculce he described in reference to its animal homologies 



VOL. XVIII. E 



