Cutleria.] ALGJR MELANOSPERME_4E. 177 



Hook. Br. Fl. v. ii. p. 279. Turn. Hist. t. 234. E. Hot. 

 Suppl Grev. Alg. Brit. t. 8. 



On most of our coasts, both the eastern and western shores. 1 10 

 feet long or more, capillary, excessively branched and entangled. 

 Fruct. very rare, and hitherto only described by Dr. Greville. 



16. DICTYOTA. Lamour. Dictyota. 



Frond flat, highly reticulated, membranaceous, dichotomous or. 

 irregularly cleft (palmato-flabelliform in D. atomaria). Root 

 a mass of woolly filaments. Fruct. composed of scattered or 

 variously aggregated, somewhat prominent seeds, on both 

 surfaces of the frond. Grev . Name : ZIKJVOV, a net, the 

 fronds, as in all this tribe, appearing reticulated when mag- 

 nified. 



1. D. dichotoma, Lamour. Dichotomous Dictyota. Frond 

 olive-green, regularly dichotomous linear ; segments becoming 

 gradually narrower toward the extremities; seeds scattered or 

 irregularly clustered. Hook. Br. FL v. ii. p. 280. E. Bot. 

 t. 774. /3. intricate, Grev. ; frond very narrow, much branched, 

 twisted and entangled. 



In the sea, on rocky shores, both varieties common. (3. greatly re- 

 sembles the exotic D.furcellata, but differs in the segments becoming 

 gradually attenuated ; whereas, in that species, the frond is of one 

 breadth throughout. 



2. D. atomaria, Grev. Sprinkled Dictyota. Frond olive- 

 brown, palmato-flabelliform or cuneate, irregularly cleft and 

 laciniated ; seeds forming waved transverse lines, with interme- 

 diate scattered ones. Hook. Br. Fl. v. ii. p. 280. Grev. Alg. 

 JBrit. p. 58. D. zonata and D.ciliala, Lamour. Zonaria ato- 

 maria, Ag. Sp. Alg. v. i. p. 128. Ulva atomaria, Woodw. 

 E. Bot. *. 419. 



Marine rocks, Coast of Cork, near Ballycotton ; Miss Ball. 



17. CUTLERIA. Grev. Cutleria. 



Frond piano-compressed, cartilagineo-mernbranaceous, subfla- 

 belliform, irregularly cleft. Root a mass of woolly filaments. 

 Fruct. : minute tufts of capsules, scattered on both sides of the 

 frond, the capsules pedicellate, containing several distinct 

 granules. Grev. Named by Dr. Greville in honour of my 

 valued friend Miss Cutler of Sidmouth, a most acute and 

 zealous algologist, and the discoverer in England of Grate- 

 lo upia filicina . 



1. C. muUifida, Grev. Multifid Cutleria. Grev. Alg. Brit, 

 p. 60. t. 10 Ulva multifida, E. Bot. t. 1913. Hook. Br. FL 

 v. \\.p. 281. 



Y 



