154 PRELIMINAEY REPORT UPON THE 



C. foeniculacea (Fennel-leaved Cystoseira). From Bovisand outwards. Perennial. 

 Summer. 



C. fibrosa (Fibrous Cystoseira). From Bovisand outwards. Perennial. Summer. 

 Pycnophycus tuberculatus (Tubercled Pycnophycus). In rock-pools, from Mount 



Batten outwards. Perennial. Summer and autumn. 



Fucus canaliculalus (Channelled Fucus). On rocks, between high water and half- 

 tide. Perennial. Summer and autumn. 



F. nodosus (Knobbed Fucus). On rocks and large boulder stones. Perennial. 

 Spring and summer. 



F. serratus (Serrated Fucus). On rocks, half-tide level. Perennial. Winter and 

 spring. 



F. vesiculosus (Twin-bladdered Fucus). On rocks, stones, quays, &c., exposed at 

 low water. Perennial. Summer and winter. 



F. ceranoides (Horn-like Fucus). In a brackish stream, Laira embankment. Per- 

 ennial. Spring and summer. 



Himanthalia lorea (Leather-thong Himanthalia). Abundant on the shore. Spring 

 and summer. 



Order II. Sporochnacese. 



Desmarestia aculeata (Prickly Desraarestia). On rocks on the coast, near low- 

 water mark, and at a greater depth. Perennial. 



D. ligulata (Tapering Desmarestia). On rocks on the coast, near low-water mark, 



and at a greater depth. Perennial. 

 D. viridis (Green Desmarestia). Firestone Bay ; Mount Edgcumbe ; low water. 



Annual. Spring and early summer. 

 Arthrocladia villosa (Hairy Arthrocladia). Sound. Annual. Summer. 

 5/^orocAHi«*;tferf2«Kcw/a^MS (Pedunculated Sporochnus). Sound. Annual. Summer. 

 Carpomitra Cabrerce (Cabrera's Carpomitra). Sound. Annual. Summer. 



Order III. Laminariaceas. 



Laminaria digitata (Fingered Laminaria). Common on rocks in deep water, and in 



pools. Perennial. 

 L. saccharina (Sugared Laminaria). Common at low-water mark, and in deep 



water. Perennial. 

 L. phyllitis. On rocks. Spring. Rare. 

 L. fascia (Band Laminaria). Mount Edgcumbe ; Hoe ; Mount Batton ; and on 



buoys in the harbour. 

 Chorda filum (Thread Chorda). On rocks, stones, and in deep water. Annual. 



Summer and winter. 

 C. lomentaria (Jointed Chorda). On stones and rocks, Breakwater ; Firestone 



Bay. Annual. Summer and autumn. 



Order IV. Dictyotacese. 



Cutleria multifida (Many-slit Cutleria). Dredged in the Sound, and washed on the 



shore. Perennial. Summer and autumn. 

 Haliseris polypodioides (Polypody-like Haliseris). Dredged in the Sound, and 



washed on the shore. Perennial. Summer and autumn. 

 Dictyota dichotoma (Forked Dictyota). In pools, and on rocks and stones. 



Annual. Summer. 

 Taonia atomaria (Banded Taenia). In tide-pools, and on rocks at low water. 



Bovisand and Whitsand Bay. Annual. Summer. 

 Stilophora rhizodes (Root-like Stilophora). Parasitical on algae. Wembury Bay. 



Annual. Summer. 

 Dictyosiphon foeniculaceus (Fennel Dictyosiphon). In pools, and on rocks and 



stones. Torpoint. Annual. Spring and summer. 

 Striaria attenuata (Tapering Striaria). In pools. Firestone Bay ; Trevol ; Hoe. 



Annual. Summer. 



