AORTIC ARCHES OF BIRDS — GLENNY 



Family Hemiprocnidae 



587 



Carotids B-4-s; type A coracoid artery; ligamentum botalli may 

 be present, but much reduced. 



Species studied 



By Garrod 



Dendrochelidon coronata= He miprocne 

 longipennis (coronata) (Tickell) 

 (B-4-s) 



By Glenny 



Hemiprocne comata major (Hartert) 

 Hemiprocne mystacea aeroplanes Strese- 

 mann 



Family Trochilidae 



Carotids B-4-s; coracoid arter}'^ types A and E (see list of species 

 below) ; ligamentum botalli absent. The functional equivalent of the 

 systemic arch usually arises as a branch of the right innominate artery 



Figure 118. — Main cervical and thoracic arteries in the Trochilidae, ventral view. (For 

 explanation of symbols see p. 551.) 



just posterior to the point of origin of the subclavian and common 

 carotid arteries (fig. 118). 



The right ductus caroticus comes to serve as the functional systemic 

 arch (Glenny, 1953c, 1954c). 



