MUSCLES CONNECTED WITH THE SHOULDER-JOINT 



02 



O 



Table (continued). 



Name of Muscle in Mammal 



Homologue in 



Upper Extremity of Bird. 



Piriformis. 



lIomol<'i»ne in 

 Up|>er Extffinitj of Bsptile. 





External and internal intercos- 

 tal of anterior intercostal space. 



" Subclavins " of birds. 



Biceps femoris. 

 Semimem branosus. 

 Semitendinosus. 



SuhclavWM of reptiles. 



HHMM 



ial Homologue. 



In 



Macropm mqjor a 



muscular Blip arises from supe- 

 rior border of scapula near th 







origin of omohyoid. It p.- 

 down over the tendon of the 

 mthscapuhm I h which mus- 



cle it iscloH'h connei 'd for an 



inch and a half, s I it is ah 



attached to ihe tendon of the 



/ 7^ as it glide- tli inner 



tuberosity of the humerus. It 

 is insert* d on the inner side of 

 humerus above but close to the 



tendon of the /< rm major, over- 

 lying and giving fibres to the 



inner head of the frircps. This 

 muscle corresponds with the 

 iliac head of the pyriformi$% 

 The r rmnio-lrachclimi « rre- 

 ponds with its sacral h 



External and internal inter 



costal muscles. 





M cle arising from posterior 



vertebral angle of scapula, and 



£ seeing down to oheranon. 

 • red + t. in Cuvier and 

 Laurillard*- ' Planches de M vo- 



logie/pk 100, 104, 108. 





DESCRIPTION OF PLATE XLVIL 



Fig. 1. Scapulo-coracoid arch of Crocodile (Crocodilus vulgaris). 



sc. Scapula. 

 cr. Coracoid. 

 ffL Glenoid cavity. 

 be. Facet of origin of biceps. Bound this portion of the coracoid the head of the " epicoraco- 



humeral n muscle which comes from the inner surface of the scapula winds. 

 per. Prsecoracoid. The surface whence the coracoid bead of the w cpicoraco-humeral" muscle aru 



extends from the point lettered per up to the line of fissure between scapula and coracoid. and 



a little beyond it. 

 d. Ridge on scapula, giving origin to deltoid. 

 tc. Facet of origin of triceps. 

 ss. Surface of origin of supraspinatus. 

 erf. Coracoid foramen. 

 Fig. 2. Scapulo-coracoid arch of Emu (Dromaius Novce Holl an dm) . Adult. 



sc. Scapula. 

 cr. Coracoid. 

 gl. Glenoid. 



per. Prsecoracoid. 



cla. Line of clavicular abutment on scapula. 



fact 



ors 



Between the points per and gl } and below cla, lies the prseglenoid expanse, made up 

 both from scapula and coracoid. From this expanse the coracoid head of the epicoraco-humeral muscle 

 takes origin. The deltoid takes origin from the scapula immediately 



abov 



1 



