The Pectoral Group of Muscles. 99 



December 6, 1888. 



Professor G. G. STOKES, D.C.L., President, followed by 

 Dr. W. POLE, Vice- President, in the Chair. 



The President announced that he had appointed as Vice- Presi- 

 dents 



The Treasurer, 

 Sir James Paget, 

 Dr. Pole, 

 Sir Henry Roscoe. 



The Presents received were laid on the table, and thanks ordered 

 for them. 



ERRATUM, No. 273. 



P. 34, line 7. After the word balance, reference to Note on 

 p. 36 omitted. 



II. "The Pectoral Group of Muscles." By BERTRAM C. A. 

 WINDLE, M.A., M.D. (Dub.), Professor of Anatomy in the 

 Queen's College, Birmingham. Communicated by Pro- 

 fessor A. MACALISTER, F.R.S. Received October 25, 1888. 



(Abstract.) 



This paper is an attempt to explain the morphology of the pectoral 

 group of muscles, and is based on the dissection of over fifty mammals, 

 and on descriptions of others in various journals, &c. 



The following are the chief conclusions : 



1. That portion of the lateral sheet of muscle, pushed outwards in 

 the form of a cone by the growth of the anterior limb-bud, which 

 belongs to the ventral region, may be divided by" radial lines of fission 

 into three segments, viz., an anterior or manubrial, a mesial or gladi- 

 olar, and a posterior or abdominal. 



VOL. XLV. H 



