PAtJNA AND FLORA OF PLYMOUTH SOUND. 157 



P . fdEtidissima (Fetid Polysipbonia). Mount Edgcumbe. AnnuaL Summer. 



P. parasitica (Parasitic Polysipbonia). On corallines, in pools and deep water. 



Firestone Bay. Annual. Summer. 

 P. byssoides (Byssoid Polysipbonia). On rocks and stones, near low-water mark, 



and in deep water. Annual. Summer. 

 Dasya coccinea (Scarlet Dasya). Deep water. Annual. Summer and autumn. 

 D. ocellata (Ocellated Dasya). On mud-covered rocks. Beggar's Island ; Torpoint. 



Annual. Summer. 

 D. arbuscula (Sbrub Dasya). On rocks, low-water mark. Mewstone; Mount 



Edgcumbe. Annual. Summer. 



Order VIII. Laurenciacea, 



Bonnemaisonia asparagoides (Asparagus-like Bonnemaisonia). Sound, and washed 

 on shore. Annual. June to September. 



Laurencia pinnatifida (Pinnatifid Laurencia). Abundant on rocks. 



L. caspitosa (Tufted Laurencia). On stones and rocks. Wembury Bay. Annual. 

 Summer. 



L. dasyphylla — [Chondria dasyphylla'] — (Thick-leaved Laurencia). On rocks, low- 

 water mark. Bovisand ; Mount Edgcumbe. Annual. Summer 



L. obtusa (Obtuse Laurencia). On the larger algje. - Annual. Summer and 

 autumn. 



L. tenuissima — {^Chondria tenuissima'] — (Slender Laurencia). On rocks, low-water 

 mark. Bovisand. Annual. Summer. 



Chrysymenia clavellosa — [^Chylocladia clavellosa'] — (Clubbed Chrysymenia). Abun- 

 dant in pools and deep water. Annual. May to September. 



C. rosea — iChylocladia rosea'] — (Rosy Chrysymenia). In pools, and on sides of 

 rocks. Mount Edgcumbe ; Firestone hJay. January to June. Rare. Taken 

 by J. Gatcombe. 



Chylocladia ovalis — [Lomeniaria ovalis'] — (Oval-leaved Chylocladia). On rocks, 

 deep water, and on other algae. Mount Edgcumbe; Firestone Bay. Annual. 

 Spring. 



C. kaliformis — [Lomeniaria kaliformis'] — (Whorled Chylocladia). On rocks, deep 

 water, and on other algae. Mount Edgcumbe ; Firestone Bay. Annual. 

 Summer. 



C. reflexa — [Lomeniaria reflexa] — (Reflexed Chylocladia). Occasionally in tide- 

 pools. Annual. Summer. Rare. 



C.parvula — [Champia parvula] — (Small Chylocladia). On small algae and coral- 

 lines. Firestone Bay. Annual. Summer and autumn. 



C. articulata (Jointed Chylocladia). On rocks and algae. Annual. Spring and 

 summer. Common. 



Order IX. Gorallinacese. 



Corallina officinalis (Medicinal Coralline). On rocks, and in pools between tide- 

 marks. Common. Perennial. 



C. squamata (Scaled Coralline). On rocks, and in pools between tide-marks. 

 Common. Perennial. 



Jania n<Z>ews (Red Jan ia). On small algs. Bovisand and Whitsand Bay. Annual. 

 Summer. 



Melobesia calcarea (Chalk Melobesia). On rocks round the coast. Perennial. 



M. membranacea (Membranaceous Melobesia). On rocks round the coasi. Peren- 

 nial. 



M. polymorpha (Many-shaped Melobesia). On rocks round the coast. Perennial. 



M. pustulata (Pimpled Melobesia). On Phylophora rubens and other algae. 

 Annual. Summer. 



Hildenbrandtia rubra (Red Hildenbrandtia). On smooth stones, pebbles, and deep 

 water. At all seasons. 



