202 MISS JOAN B. PROCTER ON THE VARIATION 



Exam'ple. 



Length of prsecoracoid 10 units. 



„ scapula (lower border) 5 ,, 



„ „ (free upper edge) 3'1 ,, 



„ „ shaft 2-2 ,, 



Breadth of ,, (distal end) 3'5 „ 



Length of supra-scapula 9*4 ,, 



Text-fisure 5. 



Pectoral girdle of Discocflossus pictus, X2 ; from within. 



BoMBiNATOR Merr. 



B. igneus Laur. — Scapula much reduced, subtriangular in 

 shape ; upper edge shorter than distal edge. Shaft vestigial ; 

 pars acromialis much reduced, forming an oblique suture with 

 head of prsecoracoid ; pars glenoidalis much depressed, longer 

 than pars acromialis, from which it is separated by a notch 

 rather than by a cleft. 



Example. 



Length of prsecoracoid 10 units. 



„ scapula (lower border) 4*3 „ 



» „ (upper „ ) 2-6 „ 



„ ,, shaft 1"7 „ 



Breadth of ,, (distal end) 3-2 „ 



Length of supra-scapula 9'1 ,, 



Text-fio'ure 6. 



Pectoral girdle of Bomhinator maximus, X3; from witliovit. 



B. paclmjpus Blgr. and B. orientalis Blgr. — Scapula as in 

 B. igneus. 



B. maximus Blgr. — Scapula as in B. igneics in shape and pro- 

 portions, but differing in that the upper border and adjoining 



