CRYPTOGAMIA ALG^E. 229 



Bot. Gall. ii. 944. Fucus endiviafolius, LIGHTF. Scot. 948. t. 32. 

 F. laceratus, Eng. Hot. t. 1067. Delesseria lacerata, HOOK. Scot. ii. 

 101. Nitophyllum laceratum, GREV. Alg. Brit. 83. 



Hob. On the stems of Laminaria digitata, not common. Q 



7. //. laciniata, frond stemless, bright red, subopake, somewhat 

 cartilaginous, expanded, deep and irregularly cut ; segments di- 

 lated upwards, irregularly palmate, blunt, with even or fringed 

 margins. Bot. Gall. ii. 945. Fucus laciniatus, LIGHTF. Scot. 947- 

 Sphcerococcus laciniatus, HOOK. Scot. ii. 103. Rhodomenia laciniata, 

 GREV. Alg. Brit. 86. 



Hab. Coasts of Berwickshire and N. Durham, frequent. 



I have a specimen of this species, in which there are scat- 

 tered irregularly over the frond small circular clusters of 

 papillary tubercles about a line in height. The papillae 

 contain minute oval granules, and each cluster or tuft is 

 composed of about 20 papillae. It is a sort of fructification 

 unnoticed by Dr GREVILLE, and perhaps affords a proof 

 that characters drawn from the parts of fructification in 

 the classification of the Alga, are only of subsidiary value. 



8. //. cristata, " frond semicircular, membranaceous, subdicho- 

 tomous, the segments somewhat dilated upwards, repeatedly sub- 

 divided, the divisions alternate decurrent laciniate at the ends ; 

 capsules spherical, imbedded in the margin of the frond." Spce- 

 rococcus crtetatus, GREV. Crypt. Fl. t. 85. Rhodomenia cristata, 

 Alg. Brit. 89. 



Hab. On the roots of Laminaria digitata, very rare. Q 



My specimen, though small, answers in other respects very 

 well to the figure and description of Dr GREVILLE. 



130. DELESSERIA. 



1. D. sanguinea, stalk cylindrical, branched ; leaves stalked, 

 large, oblong -ovate, entire, undulate, transversely veined ; fructi- 

 fication stalked, attached to the midrib HOOK. Scot. ii. 100. 

 GREV. Alg. Brit. 72. Fucus sanguineus, LIGHTF. Scot. 942. 

 WITH. iv. 102. 



Hab. Coasts of Berwick and N. Durham, frequent. <J 



