OR, A TREATISE ON PILE. 



19 



S inches ; diameter, \ of an inch. Thickest in the centre and tapering to both extremities ; 

 apex pointed. 



Fig. 11, represents a transverse section of one of these spines. 



OF THE SPINE OF THE PECARY. Gen. Dycotyles of Cuv., from "dis," double, and 

 " Kotule," a cavity, or navel. There are two species, D. torquatus of F. Cuv., and D. 

 labiatis, (white lipped, see And. and Back. Quad. 1 v., 233.) It somewhat resembles a 

 hog, but has no tail, and the canine teeth do not extend beyond the margin of the lips. 

 Found in South America. 



The spine we are about to describe came from a full grown male, exhibited in Phila- 

 delphia, at the Zoological Institute in the winter of 1847-8. 



Length of the button, -jf^ of an inch ; of the neck, T ^, and of the shaft, 4 inches and 

 J^=4 inches and -^-fa . Diameter of the button T -J 7 , of the neck -^, of the shaft T f 7 by 

 i^f. Shape, oval ; colors, horny white, brown and black, in clouds and patches. Weight, 

 i of a grain. Surface, smooth. Direction, at an acute angle. Inclination, straight, except 

 slightly undulated. See fig. 12, where No. 1 represents the button, neck and a small 

 portion of the shaft. No. 2, a transverse section of the button. Nos. 3 and 4, transverse 

 sections of the shaft. No. 5, a longitudinal section of the cortex. No. 6, the 

 termination of the shaft, and No. 7, a longitudinal section of the stellated figure 

 represented in No. 4. 



Ductility, Elasticity and Tenacity. 



There was no extension under 6,298 grains. 



With 6,298 grains the extension was T | 7 of an inch, the shrinking upon removal of the 



weight complete. 



" 



" 7,173 



" 7,653 



" 8,133 " 



" 8,613 " 



" 9,093 " 



" 9,798 " 



" 10,226 " 



" 10,673 " 





 <( 

 tt 



a 

 it 

 tt 



tt 

 tt 

 n 



it 

 it 

 tt 



-fa 



Minus 



of an inch. 



or \\ Ibs. " 





 " 



" H,633 " 



" 12,H3 " 



" 14,173 "or 2 Ibs. 



" 14,653 " 



" 



or i of the whole. 



the spine parted. 



OF WHISKERS. Roget (Animal and Vegetable Physig. p. 25,) says that the whiskers of 

 the feline, and of some other animals, are supplied with vessels and nerves, andar e thus 

 converted into organs of touch*. 



* In Illust. of Nat Hist. 355, whiskers are said to increase the sense of smell. (!) 



