THE WHALEBONE WHALES OF THE WESTERN NORTH ATLANTIC. 95 



Skeleton : 



Total length, as mounted, straight (35 ft., 5 in.) 42^ "" 



Greatest breadth of axis .' 



26.0 



Depth of centrum of axis 



^ 7.0 



Greatest breadth of ist dorsal. . . . 



24.0 



Depth of centrum of ist dorsal o > 



Greatest breadth of ist lumbar u ' 



300 



Depth of centrum of ist lumbar. . . ^ 



lO..' 



Greatest breadth of ist caudal (32d vertebra) ^a o 



Depth of centrum, ist caudal 



Breadth of right scapula 



■^ ^ 42.0 



Breadth of left scapula 



Depth of scapula 



Length of right radius along center, with proximal epiphyses 3^ c 



Length of left radius along center, with proximal epiphyses ^ . c 



right " " " without epiphyses ^2? 



" left " " " " " ■' 



^ 32.75 



" ulna with epiphyses , . ^ 



" " right ulna, without epiphyses 2g , 



'^" 28.5 



Length of humerus (straight) 2, ^ 



without epiphyses , , q 



Length of glenoid fossa of scapula j , q 



Breadth " " " " " .'.....'!.'! 9.5 



Length of longest rib go ^ 



In connection with his oi'iginal description of the type-skeleton, Cope recoided 

 a number of measurements, some of which are taken from the same points as those 

 above, and others from different points. Thus, the length of the fore-limb is <^iven 

 as 9.05 feet, which is, of course, erroneous, and due to the incorrect mounting of the 

 skeleton. The breadth of the cranium between the orbital pi-ocesses of the frontals 

 is given as 6.41 feet, and the breadth between the coronoids of the mandil)le, 5.75 

 feet. The height of the scapula is recorded as 29.6 inches, and its breadth, as 44.4 

 inches, which, it will be seen, are close approximations to my own measurements as 

 given above. 



In the type-skeleton of M. osphyia all the epiphyses are unattached. Those 

 of the vertebrae are held together in pairs by the dried intervertebral cartilage. A 

 few are wanting. The vertebrae present are as follows: C. 7, D. 14, L. 10, Ca. 17 

 = 48. Fourteen ribs are present on the right side and thirteen on the left side. 

 Cope mentioned fourteen pairs of ribs, so that it is possible that one rib has been 

 lost since he examined the skeleton. 



Skull. — The nasal bones are wanting. The anterior border of the orbital 

 process of the frontal is nearly straight. The breadth of the skull between the 

 distal extremities of the orbital processes is six feet five and one-half inches. 

 The occiput is swollen laterally, with a (piite deep central depression and a .small 

 median ridge. The coronoid processes of the mandible are low and blunt, but the 

 tips have, as already stated, apparently been cut o&. 



VertebrcB. — The antero-posterior length of the centra of the vertebra3 present, 

 without the epiphyses, is as follows : 



