70 



\i-;ii;rin.\r^- PATII0LO(;^•. 



i C 



Fi;i,. 41 — S.ADjiaimis TriK'h. alis 



aftur RailliLt. 



a. Atlult worm natural sizf. 



b. ,Malu attached to fomalu 



enlar.^< d. 



c. Female enlarged. 



Pig 1- — Selerostdiiia Ilypostniiiviiii, 



after RailUct. 

 a- r'cplialic extremity' enlarged, 

 b. Adult f'.ninle. 

 :• Adult male. 



-TrirlitK-eolialiis Oepre^sinsoulug 



of a Dos, alter Railliet. 



the other 1)ranclie.s nf the animal kingdom arc Ihcir jointed ap- 

 pendages, .'segmented Ixidy, and bilateral syninietr}'. 



The parasitic arthropoda ol)tain their food from their hosts. 

 Some of them crmsume epidermal scales and hair, e. g., the 



