PLATE XI. 



Figure* magnified 500 diameters. 



m.M UKrwni m. . 



Ml M CONSTRII 11 M. 



i] i \i l; u i i.i m. two forms, 



HI M I Mil I. MIM, .... 



HI \l 1H I. \l \ I IM, .... 



I i m i oro> a i TM. two forms, 



hi m nodosum, falling to pieces through decay, 

 a form of; See Plate XII, tiu. 20, 



Pace. 

 . 50 



50 



. 49 



51 



Mi 



19 



50 



.Ml 



