MR. W. H. FLOWER ON THE OSTEOLOGY OF THE SPERM-WHALE. 307 
dimensions; on the other hand it is very long, projects slightly outwards, and then 
directly forwards, 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 epiphysial nodule was imbedded. 
The scapule 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, 
inches, inches, inches. inches, 
Extreme length, from highest part of superior border to ae 361 39 37 
margin of ‘glenoid GE, Mtb BOLE M Ad. 10.00" 5, 2 i ‘ 
Length from centre of superior border to middle of glenoid fossa. 32h 36 34 35 
Length of anterior margin, from anterior superior angle to anterior 361 41 36 
PAATeiNLolelENOLds LOSE eta « teres st eetelcks dec erebira eileves 
Length of posterior margin, from posterior superior angle to pos- Rye 
sae see of enna fossa - Riscue svetete e EHD te is eccint B He } ae a 272 ah 
From anterior superior angle to origin of acromion process........ 21 223 21 
Breadth between anterior and posterior superior angles .,........ 29 342 293 27 
Breadth immediately above the root of the acromion process ...... 12 13} 123 13 
From posterior inferior angle (hinder margin of glenoid fossa) ai 931 261 99 
Cail GS? EOO N20 pa aD OOD TS Ape Be OOD OL emamhoe ce 2 e 2 
Meret hVOMACKOMMON hr tekress celenicstiie ea teecd ats tie cieteeiee he es 133 163 13 14 
Vertical height of acromion at narrowest part (near its root)...... 54 6 53 43 
Vertical height at broadest part (near its extremity) ............ 93 11 ial 8 | 
From posterior inferior angle, to end of coracoid process.......... 165 193 162 21 
Hemet Oh eOracOld PhOCERSaranelrtciemters cscir <iehevctaye wasslelcreysiplei set en tas 7 12 83 11 
Vertical height of coracoid process at its narrowest part, near middle. 23 3 4 
Vertical height at its thickest part, near its extremity .......... 3 5 5 33 
Length of glenoid fossa, including its thickened margin.......... 94 9 8 10 
Breadth of glenoid fossa, including its thickened margin ........ 8 8 8 
In the superior height of the scapula compared to its breadth, Physeter presents much 
the same deviation from the other Dolphins as Balewna does from the other Whalebone- 
Whales. The scapula of Hyperoodon is intermediate between that of Physeter and 
the low broad form so characteristic of the typical Delphinidw. 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.—PART VI. 3D 
