FAUNA AND FLORA OF PLYMOUTH SOUND. 155 



Punctaria latifolia (Broad-leaf Punctaria). In pools, and on rocks. Mount Batten. 



Annual. Summer. 

 P. plantaginea (Plantain Punctaria). In pools, and on rocks. Mount Batten. 



Annual. Summer. 

 Asperococcus compressus (Compressed Asperococcus). In pools, and on rocks. 



Bovisand. Annual. Summer. 

 A. echinatus (Prickly Asperococcus). In pools, and on rocks. Firestone Bay; 



Hoe. Annual. Summer. 

 Lit osiphon pusillus {?iva&\\ hito&ifhon). Parasitical on Himanthalia lorea. Annual, 



Summer. 



Order V. Chordariacese. 



Chordariaflagelliformis CWhipChordaina.). Cawsand; Bovisand. Annual. Summer, 

 Mesogloia vermicularis (Worm-like .Vlesogloia). Common on the coast. Annual. 



Summer. 

 M. virescens (Pale green Mesogloia). Common on the coast. Annual. Summer. 

 M. Griffithsiana (Mrs. Griffith's Mesogloia). In rock-pools. Annual. Summer. 



Rare. 

 Leathesia tuberiformis (Tuber-shaped Leathesia). Wembury Bay ; Mewstone, 



Annual. Summer. 

 L. Berkeleyi (Berkeley's Leathesia). Wembury Bay ; Mewstone, Annual. 



Summer. 

 Elachista fucicola (Fucus inhabiting Elachista). Parasitical on Fuci. AnnuaL 



Summer. 

 E. flaccida (Flaccid Elachista). Parasitical on Cystoseira fibrosa. Annual. 



Summer. 

 E. scutulata (Little Shield Elachista). Parasitical on Dictyota dichotoma. Annual. 



Summer. 

 Myrionema strangulans (Choking Myrionema). Parasitical on Ulva and Entero- 



morpha. 



Order VI. Ectocarpacese. 



Cladostephus verticillatus (Whorled Cladostephus). Common. Whitsand Bay ; 



Mount Edgcumbe ; Bovisand, Annual. Summer. 

 C. spongiosus (Spongy Cladostephus). Common. Hoe ; Firestone Bay ; Mount 



Edgcumbe ; Bovisand. Annual. Summer. 

 Sphacelaria filicina (Fern-like Sphacelaria). W^hitsand Bay ; MevFstone ; Sound. 



Annual. Summer. 

 S. scoparia (Broom Sphacelaria). Common on flat rocks. Annual. Summer. 

 S. plumosa (Feathery Sphacelaria). Mount Batten. Annual. Summer. 

 S. cirrhosa (Hair-like Sphacelaria). Rock-pools ; parasitical on other algae and 



corallines. Annual. Summer. 

 Ectocarpus siliculosus {Vod-irnit^A Ectocarpus). Parasitical on other algae ; sides 



of rocks. Summer. 

 E.fasciculatus (Fasciculate Ectocarpus). Parasitical on Laminaria. Summer. 

 E. HincksitB (Miss Hincks' Ectocarpus). Parasitical on Laminaria, in rock-pools, 



summer and autumn. 

 E. littoralis (Littoral Ectocarpus). Parasitical on algae and Zostera, in rock-pools. 



Summer and autumn. 

 E. tessalatus (Tesselated Ectocarpus). Parasitical on algfe. Summer. Rare. 

 J?. /enei^ra^MS (Windowed Ectocarpus). On rocks. Hoe. Annual. Summer. 

 E. tomentosus (Woolly Ectocarpus). Parasitical on Fucus vesiculosus. Common. 



Annual. Summer. 

 E. crinitus (Hairy Ectocarpus). On muddy sea-shores. Annual. Summer. 

 .E.^m«V/ms (Small Ectocarpus). Parasitical on small algae. Firestone Bay. Annual. 



Summer. 

 E. granulosus (Granulous Ectocarpus). Parasitical on the smaller algae. Common. 



Summer. 



