158 



I'LATi: Iir. 



lliilosloimi niridhUr I'lricli ir>0 



J. Siirracc. slidwiuL; a macula and lliin-wallcd /inrcia, x '.». 

 la. L()ii.i,ntii(liiial section, x is. 

 ]li. Tyiiical longitudinal section, x is. 



Ic. A (-(unpressed sitecinien. naluial size. All siieciniens from 

 Weisliuric, Ind. 



