234 TRANSACTIONS, NATURAL HISTORY SOCIETY OF aLASGOW. 



Tribe IL— Nemaliese. 



Helminthor^ divaricata, J. Ag. {Dudresnaya 

 divaricata, Phyc. Brit.). — "At Appin, low water" 

 (Carmiehael). 



Order III— Gelidiace^. 



Gelidium corneum, Lamx— Several varieties of 

 this variable plant were collected in Loch Etive, but 

 I had not the means of determining them at the 

 time. 



Cohort III. — GlGARTININ^. 



Order I — GigabtinacevE. 

 Tribe I. — Gigartinese. 

 Chondrus crispus, J. Ag. — Exceedingly common, 

 'passim. 



Qigartina inanim.illosa, J. Ag. — Common in Loch 

 Etive, and especially so in Loch Creran. 



Tribe II. — Tylocarpeae. 



Phyllophora rubens, Grev. — Loch Etive, Loch 

 Creran, and islets off Lismore. 



Ph. membranifolia, J. Ag. — Common in Loch 

 Etive and in the Sound of Kerrara. 



Ahnfeltia plicata, Fries. {Gymnogongrus plicatus, 

 Phyc. Brit.). — This plant, which, so far as its repro- 

 ductive organs are concerned, has long been a puzzle 

 to phycologists, I found in large quantities in all 

 the dredgings, and thrown up on the shores 

 of the islets off Lismore. I thus obtained a large 

 amount of material which, in addition to material 

 kindly supplied to me by Profs. D. H. Scott, T. 

 Johnson, and Farlow, will I hope enable me to 

 publish shortly a detailed account of its vegetative 

 structure and reproductive organs. 



Order IL— Rhodophyllidace^. 

 Tribe I.— Cy stoclonieas. 

 Cystoclonium purpurascens, Kiitz. (Hypncea 

 purpurascens, Phyc. Brit.).— Exceedingly abundant 

 and very large in all dredgings. 



