S66 CRYPTOGAMIA AhGM, 



quently find, upon the coaft of the Hebrides^ 

 and other fhores, feveral marine fubftances 

 which bear a very great external refemblance 

 to fome of the plants we have been defcribing ; 

 fuch as many fpecies of branched fponges, par- 

 ticularly the SPONGIA dichotoma, Lin. and 

 others not defcrib'd -, fome of the ALCYO-r 

 NIA, FLUSTR/E, &c. which, being gene- 

 rally received into the clafs of Zoophytes^ did 

 not properly belong to our fubjed:. We have 

 therefore purpofely omitted them -, and muft 

 refer thofe curious perfons, who would wifii to 

 jnveftigate them, to their proper place in the 

 Syjlema nature Lin. giving them only this 

 flaort direction, that fuch fiibftances may in 

 general be known not to belong to the vege- 

 table kind, by their having either a downy or 

 fpongy texture, or by their yielding a ftrong 

 fmell, like burnt oyfler-fhells, when put into 

 the fire. 



ULVA. Gcn.fl 1206. 

 FruMificaiiones in membrana diaphana. 

 pavonia i. ULVA plana reniformis fefiilis decuffatim flriata. 

 Syfl. mi. edit. 13. />. 817. FUCUS favonius. 

 Sp.pl. p. 1630. (Moris, hifi. Ox. IIL p. 645. 

 fe^, 15. /. 8. /. 7. crdinis fupericris, bcna. Ellis, 

 €or.p. 88. /. ^^. Jig. C. opt.) 



Striated 



