110 SYNOPSM OF BRITISH SEAWEEDS. 



some resemblance to tin- narrow variety of Q-, mul- 

 tipartita, but is more cylindrical, and of a different and 

 much brighter colour. In son, - it makes ii> ap- 



pearance in considerable plenty, and may not again m 

 seen for several years. I believe it has always been found 



• rejectamenta, as if east up from deep water. The 

 south coast of England is perhaps its northern limit. On 

 the French and Spanish coasts, and especially in the fct< • 

 diterranean, it is much more abundant. 



1S7. confervoides (The Conferva- 1 ike Gracilarid) ; frond car- 

 tilaginous, cylindrical, filiform, irregularly (often very 

 Blightly) branched; branches long, subshnple, erect ; ramuli 

 few, tapering at each end ; tubercles scattered, resile, 

 roundish, subacute, Grev. Alg. Brit. p. 123. (Atlas, 

 PL XLIIL Fig. 198.) 

 Hypnea confervoides, J. Ag. Sphaerococcus confervoides, Ag. 

 Gigartina confervoides, Lama, Fucus confervoido, Linn. 

 F. longissimus, Gm. F. verrucosus, Muds. F. albidus, Jluds. 

 F. flagellaris, Esper. 

 Bab. On rocks and stones in the sea, near low-water mark, and 

 at a greater depth. Perennial. Summer and autumn. Xot 

 uncommon. 

 A variable plant, as its numerous sjmonynis testify, and 

 yet. with a little practice, easily recognized among British 

 Algae. Several exotic species, however, nearly approach 

 it, some of which ought, perhaps, to be united with it. 



188. erecta (The erect Gracilaria) • fronds numerous, from a 

 common disk, short, erect, cylindrical, sparingly dichoto- 

 mous ; branches subsimple ; tubercles globose, clustered ; 

 tetraspores contained in terminal, lanceolate, pod-like ramuli, 

 Grev. Alg. Brit. p. 124. 1. 14. (Atlas, PL XXXVI. Fig. 168.) 

 Plocaria erecta, Endl. Gigartina erecta, Hook. Spserococcus (?) 



erectus, Grev. 

 Hab. South coast of England. On sand-covered rocks near low- 

 water mark ; also in 4-5 fathoms water. Perennial. Fruit- 

 ing in winter. Very rare. 

 A curious and elegant little plant, scarcely known out 

 of England, and one of the discoveries of Mrs. Griffiths, to 

 whom it has long been familiar under the manuscript 

 name suffocatus ; a name designed to express a peculiarity 

 of growth, its favourite habitat being the flat bottoms of 

 shallow rock-pools, where it is generally half-buried in 

 sand. Dr. Greville, who first described and figured it in 

 his * Cryptogamic Flora,' gave it the name erectus, from 



