IVIE. "W. H. FLOWER ON THE OSTEOLOGY 0¥ THE SPERM-WHALE. 



35T 



dimensions ; on the other hand it is very long, projects slightly outwards, and then 

 directly fonvards, and is expanded vertically at its acromial termination. The coracoid, 

 which arises immediately below the spine, but rather to the inner side, or just above 

 the anterior edge of the glenoid fossa, is a stout, compressed, truncated process, some- 

 what dilated at its extremity, and of about half the length of the acromion. The 

 glenoid fossa is a very broad and irregular oval, with prominent margins. On the pos- 

 terior internal part of the margin the surface of the bone is rough, as if the process of 

 ossification were not complete ; and in the cartilaginous mass which covered it a detached, 

 rough, irregular epiphj'sial nodule was imbedded. 



The scapula; of the different specimens examined present slight variations in form 

 and proportions, as will be seen by the following table of dimensions. There is nothing, 

 however, in this bone or in the other osseous structures of the limb to distinguish the 

 Tasmanian from the northern Cachalots. 



Dimensions of Right Scapula. 



Tasmanian. Yorkshire. Caithness. 



Paris. 



Extreme length, from highest part of superior border to anterior ] 



margin of glenoid fossa j 



Length from centre of superior border to middle of glenoid fossa . . 

 Length of anterior margin, from anterior superior angle to anterior 1 



margin of glenoid fossa J 



Length of posterior margin, from posterior superior angle to pos- 1 



terior margin of glenoid fossa J 



From anterior superior angle to origin of acromion process 



Breadth between anterior and posterior superior angles 



Breadth immediately above the root of the acromion process ...... 



From posterior inferior angle (hinder margin of glenoid fossa) to 1 



end of acromion J 



Length of acromion 



Vertical height of acromion at narrowest part (near its root) 



Vertical height at broadest part (near its extremity) 



From posterior inferior angle, to end of coracoid process 



Length of coracoid process 



Vertical height of coracoid process at its narrowest part, near middle. 



Vertical height at its thickest part, near its extremity 



Length of glenoid fossa, including its thiclcened margin 



Breadth of glenoid fossa, including its thickened margin 



inches. 

 361 

 321 

 36| 



261 



21 

 29 

 12 



231 



13| 



51 

 9| 



2| 

 3 



inches. 



39| 



36 



41 



26 



22i 

 34| 

 13i 



161 



6 

 11 

 19i 

 12 



3| 



5 



9 



inches. 

 37 

 34 

 36 



27i 



21 

 29| 



121 



22 



13 

 51 

 11 

 16| 



8| 

 3i 



inches. 



35 



26 



27 

 13 



14 



4| 



8 

 21 

 11 



10 



In the superior height of the scapula compared to its breadth, Physeter presents much 

 the same deviation from the other Dolphins as Bahena does from the other Whalebone- 

 Whales. The scapula of Hyperoodon is intermediate between that of Fhysetcr and 

 the low broad form so characteristic of the typical Delj}hinida;. In Kogia the scapula 

 appears to follow more closely the ordinary type. 



Humerus. — The shaft of the humerus is much compressed from side to side. The 

 head is not marked off by a very distinct neck, and the broad single tuberosity is not 

 particularly prominent. The most distinguishing peculiarity of this bone, found in all 



VOL. VI. PABT VI. 3 D 



