M 



B 



Dr Adam on the Osteology of the Hippopotamus. 363 



while the other dimensions of breadth, that are more or less va- 

 riable, terminate in the intervening spaces, or beyond. 



Let the line Mw represent 

 the edge of the mesial plane in 

 any animal ; for example, in the 

 hippopotamus. Let the lines 

 E/7, E'y, YI' p'\ represent the 

 edges of equidistant planes pa- 

 rallel to the mesial plane, on the 

 right side of the animal ; and let 

 the lines ep^ ef p\ d' p" represent 

 the edges of like planes on the 

 left side. Then, the dimensions 

 of breadth, which may be consi- 

 dered as constant, will be repre- 

 sented, those of the first class by 

 the lines B 6, B 6, B 6 ; those of 

 the second class by the lines 

 B' h, B' h\ B' y ; and those of 

 the third class by the lines B" 6", 

 Wy\ Wb'\ such lines being 

 thus all multiples of one unit. 

 Then also, by graduating the 

 line M ?7i to the same scale, fix- 

 ing terminal points correspond- 

 ing to the variable breadths, and 

 drawing lines through the ter- 

 minal points of the different ajciocrod '" 

 breadths (constant and variable), we shall obtain curves that 

 will shew in diagram the series of breadths in each species of 

 animals. 



The dimensions of length and of height may be given in a si- 

 milar manner.* 



London, Auffust 1833. 



• Dr Adam lately published, in the Unnean Transactions, an interesU 

 ing memoir on Osteological Symmetry^ which we recommend to the particular 

 notice of those naturalists who are aware of the importance of the practical 

 and theoretical views connected with such investigations. The memoir is en- 

 titled " On the Osteological Symmetry of the Camel; Camelw Bactrianw of Lin- 

 nmis," &c, — Edit. 



