THE MA.ETXE ALG.E OP GUERXSEY 7 



B. PLUMOSA Ag. [S. 3. E. 2, 4.] E. 2.— (c.i. ) £. nucla Holmes. 

 S. 3. 



Bryopsis plumosa flourishes from spring to late autumn, 

 even lasting till December. Mr. Holmes's specimen of the 

 £. nuda was gathered in September. The rank of variety 

 which is given to it in H. & B. is doubtless an oversight. 



The plant is an annual, and the form nuclei is very probably 

 only an old stage in which most of the pinnae have disappeared 

 previous to the dying away of the plant itself. Three small 

 pieces were gathered in Guernsey about August, which had 

 every appearance of being the remnants of mature plants. 



Mrs. (xatty has observed that B. 'plumosa, when kept in 

 aquaria, degenerates into a denuded form which is probably 

 identical with Derhesia Lamourouxii Solier (_S. Balhisiaua 

 var. Lamourouxii J. Ag.), figured in Kutzing, vi. t. 74. 

 CODIUM ADHiRREXS Ag. [S. 4.] N. 2. r. 



C. TOMENTOSUM Stackh. v.c. 



C. Bursa Ag. [S. 2, 3. Dec. '05.] 



FUCOIDE^. 



Pk{E0SP0REJ5. 



Desmarestia viridis Lam. H. & B. '02. 



D. ACULEATA Lam. c. Thrown up from deep water, and on 

 bulbs of Sacchoriza. N.W. 2. N. 2. 



D. LiGULATA Lam. c. Low tide, quantities thrown up. [N.W. 4. 

 S. 5.] S. 3. 



DicTYOsiPHOX FffiXicuLACEUS Grev. H. & B. ]Sr. 1. Rock- 

 pools. 



LiTOSiPiiox pusiLLUs Harv. c. [E. 2, 10, 6.] W. 4, 7. On 

 AsperocoGcus Jistulosus and Chorda fi.lum. 

 G. Phl(EOSPORA brachtata Born. {Ectocarpus hrachiafus Harv., 

 StictyosipJwn Grijjfitlisianus H. & B.). r. On Bhodymeiiia 

 pal mat a. N. 1, 2. 



PUXCTARIA PLAXTAGINEA GreV. [N.W. 4.] 



p. LATiFOLiA Grev. [S. 5.] 

 C.I. Phycolapathum crispata Batt. One specimen thrown up." 

 N. 1. 



Phyllitis Fascia Kiitz. {Laminaria Harv., P. ccBspitosa 

 Le Jol.). [N. 1, 2.] 



ScYTosiPHON" LOMEXTARius J. Ag. (CJiorda lomeiitaria Lyngb.). 

 [r.] E. 6. On stones. 

 CI. CoLPOMEXiA six^uosA Dcrb. & Sol. Twice found thrown up. 

 E. 6. N.W. 4. 



This plant is a native of the Indian Ocean. Good speci- 

 mens were found on rocks at low tide at St. Peter's Port 

 and Cobo. The distribution of the species and its appearance 

 and growth along the southern shores of England have been 

 fully dealt with by Cotton in Kew Bull. 1908, 11. 



AsPEROCOCCUS FiSTULOSUS Hooker (^A. echinattis Grev.). c. 

 [E. 6.] W. 4. On stones. 



