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habitat is restricted, and not unfrequently covering whole thongs of that 

 species with its Httle shield or sheath-like fronds ; at first resembling 

 little dots, tipped with the slender filaments, which gradually increase in 

 size until they frequently entirely surround the thong. The tubercle is 

 very compact and firm, but the surface is lubricous and slippery, which 

 enables it to adhere closely to paper. 



ELACHISTA SCUTULATA. 



EXPLANATION OF DISSECTIONS, &c. 



Fig. 1. — Elacliista scutulata, tufts of, on Himanthalia lorea, natural size. 

 2. — Section of part of a tuft. 

 3. — Filaments from same. 

 4. — Spore with its pedicel. 

 5. — Joints from the elongated filaments. All magnified. 



