PROVINCIAL MUSEUM, HALIFAX, N. S. PERKINS. 147 



three ribs are plainly seen, but those for the remaining three 

 cannot be well made out. It is reduced one-half in plate I. 



While on account of the condition of the bone, exact 

 measurements cannot be made, yet it may be well to notice that 

 as we have it, the total length is 229mm. (9 inches), width 

 across the upper end 191mm. (7J inches), width across the 

 articular spaces at the lower end, 83mm. (3-J inches), thickness 

 at the upper part 38inm. (1^ inches), average thickness rather 

 more than 18mm. (f inch). The whole bone is somewhat 

 curved longitudinally. 



Scapula. Both scapulas were preserved, but in a much 

 broken condition, so much so that the original form cannot be 

 made out. It is, however, most probable that these bones had 

 the same form as in recent specimens of Monodon. They 

 appear to have been thin and thus easily broken. A consider- 

 able part of the glsnoid cavity is present in each scapula. 



Specific position. In Dr. Gilpin's account of this speci- 

 men we find the following, " The fragment of the lower jaw so 

 exactly resembles the cut in Dana's Geology, of Beluga ver- 

 montana, as to hazard the conjecture that they are closely allied 

 if not identical." Students of anatomy do not need to be told 

 that this is very slight foundation for regarding the two speci- 

 mens as of the same or allied spscies. Dr. Gilpin's account 

 was published in 1873, and since then, the Halifax specimen 

 has bean assumed to be the same as Thompson's Vermont 

 specimen. 



After the bones were received from the Halifax museum 

 they were compared with those of the Vermont specimen, and 

 it soon became evident that the two were in important respects 

 unlike. Had the Halifax specimen been as complete as is the 

 Vermont, it is certain that the differences would have been more 

 numerous and more marked. 



Very fortunately, there is one periotic with each skeleton, 

 and thus we can compare what is probably the most important 



