39 



III. Pediculated masses ; flat, flabelliform ; simple or 



lobated. 



Species. 



44. S. plancella Truncated oval form, flat; not 



thick ; curved on one of its 

 edges ; tissue lightly encrusted, 

 and finely porous. 



45. — pala Spatuliform, openings round, on 



its upper margin. 



46. — Jiabelliformis ...Y2in-?orm.edi\ elegantly reticu- 



lated, with superficial undu- 

 lating stripes, decussating on 

 the disk. 



47. — pluma Finely fibrous; spread fan-like. 



48. — carduus Open, like a fan ; with lamellated 



wrinkles on both sides, and 

 echinated with spines. 



49. — pannea Flabelliform; with a cloth-like 



texture. 



50. — Jissurata Fan-formed ; more or less lobated, 



and covered with small irre- 

 gular crevices. 



51. — cancellaria Low, flabelliform, and compres- 



sed ; ramifications coalescent, 

 disposed in a trellised form, and 

 bristled on the edges. 



52. — lyrata Erect, compressed, fan -formed 



lobes, with connected tubes ; 

 upper margin rounded and set 

 with foramina. 



53. — deltoidea Erect; truncated in the upper 



part ; ( frequently encrusted 

 with vermiculse on both sides.} 



