28 MARINE ALGAE. 



P. nigrescens, Grev. BEF JK, Loch Goil 1, Arran 2, Bute 1, Cumbrae.2, 



Kildonan 1, Go u rock 6, Ayr 2, Ardrossan, etc. 20. 

 P. Brodiaei, Grev. EFJK, Arran, Bute, Cumbrae 2, Portincross 20, Kil- 



donan, Portincross 1, Girvaii 2. 

 P. fruticulosa, Spreng. E F, Arran 1, Cumbrae, Portincross 24, Bal- 



lantrae 14. 



Pterosiphonia thuyoides, Schm. EF, Arran 1, Portincross 11. 

 P. parasitica, Schm. AEFJ, Loch Fyne 20, Ardrossan 16, Portincross 11, 



Cumbrae 6, Kildonan 10. 

 Brongniartella byssoides, Bory. EF.J, Bute 1, Cumbrae 2, Kildonan 10, 



Ayrshire 11. 

 Dasya arbuscula, C. Ag. E F, Arran 1 Cumbrae 2, Ayrshire 27. 



D. coccinea, C. Ag. EFIJK, Cumbrae 2, Kildonan 10, Ayr 2, Ardrossan, 



Southend Kintyre, Ballantrae, etc. 11. 

 f. tennis, ./. Ag. A E F, Upper Loch Fyne 20, Arran, Cumbrae 2. 



CERAMIACEAE. 



Sphondylothamnion multifidum, Naeg. E F, Arran, Cumbrae 1 & 2, 

 Ardrossan 11. 



Spermothamnion Turner!, Aresch. E F, Arran, Bute 1, Cumbrae 2, Ar- 

 drossan 1. 

 f. repens, Le Jol. E, Arran, Bute 1. 



? S. Mesocarpum, Batt. =Callithamnion mesocarpum, Phyc. Bri. EF, Lam- 

 lash 32, Cumbrae 2. 



Griffithsia corallina, C. Ag.- EFI, Arrau, Cumbrae 1, Ardrossan 11, Mull 

 of Kintyre 11, (Machrihanish Bay 11). 



G. setacea, C. Ag. EF J, Cumbraes 2, Portincross 7, Kildonan 10. 



Halurus eCLUisetifolius, Kutz. EK, Arran, Ayrheacls 1. 



Monospora pedicellata, Solier. EF, Arran 11, Cumbrae 2, Saltcoats, 

 Ardrossan 1. 



Rhodochorton Rothii, Naeg. EF, Arran, Cumbrae 2, Gonrock 1, Saltcoats, 

 etc. 11, Rothesay 20. 



R. floridulum, Naeg. E F, Arran 1, Cumbrae 6 & 2. 



R. membranaceum, Magn. F, Cumbrae 2. 



R. parasiticum, Batt. ( = R. sparsum, Kjellin.). F, Cumbrae 1. 



Callithamnion polyspermum, C. Ag. B E F, Helensburgh, Arran, Cumbrae 

 2, Gourock, Ardrossan 2, Saltcoats and Largs 11. 



C. roseum, Harv. E F, Arran, Bute, Cumbrae, Ardrossau 1 & 2. 



C. affine, Harv.RF, Bute, Cumbrae 1 & 2. 



C. Hookerii, C. Ag. EF, Arran 11, Cumbrae, Saltcoats 1 & 2. 



C. Brodiaei, Harv.Ei F, Arrau 1, Cumbrae 2, Saltcoats 11. 



C. arbuscula, Lyngb. E J, Arran 1 & 2, Ballantrae 11. 



C. tetragonum, C. Ag. EF, Arran 11, Cumbrae 2, Ayrshire 11. 

 f. brachiata, J. Ag. F, Cumbrae 2, Saltcoats 11, (Machrihanish 1). 



C. corymbosum, Lyngb. E F K, Arran, Cumbrae 2, Gourock etc. 1, 

 Girvan 2. 



C. granulatum, C. Ag. EFJ, Arran 2, Cumbrae 1, Kildonan 10, West 

 Kilbride 16, Saltcoats 11. 



C. byssoides, Arn. E F, Arran, Cumbrae 2. 



Seirospora Griffithsiana, Zfary. E, Arran 11, (Ayrshire 16). 



Compsothamnion gracillimum, Schmitz. EF, Arran 1, Cumbrae 2. 



Plumaria elegans, Bonnem. E F, Arran, Ardrossan, Cumbrae 1 and 2, 

 Rothesay 20. 



Ptilota plumosa, J. Ag. E F I J K, Cumbrae 2, Campbeltown 2, Kildonan 1, 

 Ayrheads, etc. 



Antithamnion cruciatum, Naeg. E, Lam lash, Arran 2. 



A. plumula, Thur. EF, Arran 11, Cumbrae 2, Ayrshire 11. 



