THE MARINE ALG^ OF THE OBAN DISTRICT. 235 



CateneUa opuntia, Grev.-On rocks near high 

 water-mark at Dunstaffnage. Some specimens bore 

 cystocarps, a detailed account of which, made on 

 ma erial collected in 1890 at Puffin Island, Anglesea. 

 will be found in the Journal of the Linnean Society 

 {Botany). I may mention as a curious fact that 

 almost every collection I have made of CateneUa 

 opuntia at Anglesea, the Isle of Man, and on the 

 West Coast of Scotland, has provided me with 

 ^pecimens in fruit. I think this the more remarkable, 

 ^8 the cystocarpia had, until I found them in 1890 



RrdoXtr ^^^ ^' *'^ '''^' ^-''^^^ '- *^e 



Tribe IL— Rhodophyllidese 



Cohort IV.— Rhodymenin^. 



Order I.— Sph^rococcace^. 



Lo^rmfvf ^°^^^^-^^-' Grev.-Fairly common in 



PhTBHM^^T''/^i^'^' ^"*'- (J^^^dy^-enia ciliata, 

 Phyc. Brit.).-In dredgings in Loch Etive. 



Order IL— Rhodymeniace^. 

 Rhodymenia palmata, Grev.-This plant is very 

 <5ommon all along the coast. Two very large speci- 

 mens were obtained by my assistant. Mr. A. J Ewart 

 in Loch Etive. The fronds of one of these measured 

 9 inches in breadth and 2^ feet in length. Dr. Scott 

 informs me that these are the largest specimens he 

 nas seen of the species. 



Lismort^'"' "*-^~^^ ^°^^ ^^^^^"' ^«d on islets off 



Chylocladia ovalis, Hook—Rare, near Dunstaff- 

 nage. 



Plocamium coccineum, Lyngb.-Both var. latifrons. 



