go Morphology of the Fins 



uous or deceptive in its homologous allusions, it may be desig- 

 nated as proscapula. 



" The posttemporal of the Dipnoans is evidently represented 

 by the analogous element in the Ganoids generally, as well as 

 in the typical fishes. The succeeding elements (outside those 

 already alluded to) appear from their relations to be de- 

 veloped from or in connection Avith the posttemporal, and 

 not from the true scapular apparatus ; they may therefore be 

 named posttemporal, postcrotemporal, and tcleotcmporal. It will 

 be thus seen that the determinations here adopted depend 

 mainly (i) on the interpretation of the homologies of the 

 elements with which the pectoral limbs are articulated, and 

 (2) on the application of the term 'coracoid.' The name 

 'coracoid,' originally applied to the process so called in the 

 human scapula and subsequently extended to the independent 

 element homologous with it in birds and other vertebrates, has 

 been more especially retained (e.g., by Parker in mammals, etc.) 

 for the region including the glenoid cavity. On the assumption 

 that this may be preferred by some zootomists, the preceding 

 terms have been applied. But if the name should be restricted 

 to the proximal element, nearest the glenoid cavity, in Avhich 

 ossification commences, the name paraglenal given by Duges 

 to the cartilaginous glenoid region can be adopted, and the cora- 

 coid would then be represented (in part) rather by the element 

 so named by Owen. That eminent anatomist, however, reached 

 his conclusion (only in part the same as that here adopted) by 

 an entirely different course of reasoning, and by a process, as 

 it may be called, of elimination; that is, recognizing first the 

 so-called 'radius' and 'ulna,' the 'humerus,' the 'scapula,' 

 and the ' coracoid ' were successively identified from their rela- 

 tions to the elements thus determined and because they were 

 numerically similar to the homonymous parts among higher ver- 

 tebrates." 



