22 



30 



31 



Reticularia (Wy. Thomps.). Corallum an in- 

 vesting network of horny tubes, immersed in a 

 homogeneous horny crust; cells short projections 

 of the tube, curved, with simple round orifices. 

 R. immersa. Fig. 31* ; mag. 



Coppinw (Hassall). Corallum parasitic, massive, 

 hairy; cells lengthened, tubular, often curved, 



