100 



THE WHALEBONE WHALES OF THE WESTERN NORTH ATLANTIC. 



MEdAPTERA BELLICOSA COPE. (TYPE.) 



Measurement. 



Cope's 

 Measure- 

 ments. 



My 



Measure- 

 ments. 

 I goo. 



Total length of skull .... 



Length of maxilla 



" transverse, of orbital plate of frontal. ^ . 



" longitudinal " " " " 



Distal width over orbit " " '' " 



Length of nasals 



Width " " 



" " cranium behind orbits (greatest) 



muzzle ^ the distance to frontal plates. 

 " maxilla f " " " " " . 



Length of mandible on curve 



First rib, on curve 



" " distal width 



Humerus, length 



Radius, " 



Scapula, height 



width 



glenoid length 



" widUi 



IDS. 



65- 



29. 



26. 



"•5 

 9- 

 1-5 



64. 



27-5 

 lO-S 

 118. 



37- 

 7- 



21. 



2S-S 



39-5 



"5 



9- 



III. 



64-25' 



29.= 



26.= 



9-5'- 



1-25' 



67.S 

 26.25' 

 10. ' 



37- 



7.' 

 20.5" 

 29-5' 

 26.5'^ 

 38.- 

 1 1. 



9- 



The following are actual measurements of the type-skeleton, made by me in 

 accordance with the system I have applied to all the vai'ious species : 



MEGAPTERA BELLICOSA COPE. (TYPE.) 



SKULL — REGULAR MEASUREMENTS. 



Inc/lt's. 



Length (straight) 1 14.5 



Greatest breadth (squamosal) „ 67.5 



Breadth of orbital process of frontal at distal end — least — point to point. 8.25 



Length of rostrum (straight) 75. 



Breadth of rostrum at middle (curved) 26.25'" 



Length of nasals g." 



Breadth of nasals at distal end 8." 



SKELETON — REGULAR MEASUREMENTS. 



Length of skull (straight) 



Greatest breadth of axis 



Depth of centrum " " 3 POSt. 



\ ant. 



Greatest breadth of ist dorsal 



Depth of centrum " " " 



Greatest breadth of 1st lumbar 



Depth of centrum " " " 



Greatest breadth of ist caudal 



Depth of centrum " " " anterior 



Greatest length of scapula 



depth " " 



Length of radius, along middle, with proximal epiphysis 



without epiphyses 



ulna " " with proximal epiphysis , . . 



without epiphyses 



Inches, 

 I [ I. 



21-5 



7- 

 6.'^ 



'9-5 

 7-5 



29-5 

 8. 



26." 



10. 



38." 



26.5" 



295" 



25'" 

 24." 



' The left maxilla. It is broken. About 3 in. should be added. '' Along post-margin. 



' Greatest, proximally. ' Greatest; the least is 8), in. ' Left nasal ; length of inner margin. 



" Left nasal at proximal end. ' As mounted. ' Right. The left is g\ in. 



" The other rib, ist pair, 7^ in. '".Straight, when standing on its head, without distal epiphysis. 



"Right. "Left. '= As mounted. "" Twice one. 



'^ Median. The long diameter of the surface articulating with atlas is (right) 9 in. ; (left) 8f in. 



'" Twice one half ; the left diapophysis is defective. 



