178 VETEEINAEY HYGIENE 



smaller than those of the other species ; they are some- 

 times submerged and then become long and thread-like. 



Another species, CE. fistulosa, has hollow stems and 

 hollow leaf-stalks, bearing only a few segments at their 

 summits. 



Fig. 44. -The Deadly Nightshade {Atropa Belladonna). 



Chesnut, in the article already referred to, draws atten- 

 tion to other poisons resembling that of Hemlock, found 

 m the Heath family, Ericacecs, very poisonous members of 



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