190 SYNOPSIS OF BBITI8B BBAWBBD8. 



352. applanata (The flattened Rivularia), Carm. 

 PL r. 2. p. 392. 



Eal. ? 



This species, for a description of which the collector is 

 referred to Hooker's ' British Flora.' is unknown to me. 



353. nitida {The (/loss// "Rivularia) ; frond (large) gelatinoso- 

 eoriaceous, Lobed and plaited, often bullated, Lubricous, 

 Bhining deep-green, filaments Bimple, very much attenuated, 

 Ag, St/st. p. 25. (Atlas, PL LWV. Fig. 353.) 



Rivularia bullata, Berk. Scytochloria nitida, ffarv. Alcyoni- 



dium bullatum, Lamour. Physaetis lobata, K(z. 

 Hob. Common on the southern shores of England, and 



and west of Ireland. On marine rocks, at half-tide level. 

 Annual. Summer and autumn. 

 This is the largest marine species of Rivularia on the 

 British shores, ornamenting, at the end of the summer, 

 perfectly barren masses of rock with its bright-green glossy 

 patches. On the western shores of Ireland it is very com- 

 mon as far north as Galway, and perhaps further; hut has 

 only, that I am aware of, been observed on the southern 

 shores of England. Yet it inhabits the Baltic Sea. It pro- 

 bably therefore exists in many places on our shores, where 

 it has been overlooked. 



C. SCHIZOSIPHON. 



354. "Warrenise {Miss Warren's Schizo siphon) ; " fastigiately 



branched ; the lowest cell of the branches wider, hemisphe- 

 rical, lateral ; sheaths dark-coloured, the fibres often spiral ; 

 apices of the branches much attenuated," Caspary in Ann. 

 and Mag. Nat. J fist. 3rd ser. v. 6. p. 266. t. 8. (Atlas, 

 PL LXXV. Fig. 354.) 

 Hah. Coast of Devonshire. On rocks at high-water mark, chiefly 

 in places exposed to the dripping of fresh- water. 

 I have copied the specific character and description of 

 this curious plant from Dr. Caspary's account published 

 in the 'Annals of Natural History,' to which I refer for 

 fuller particulars and a further analysis. Professor Kiitz- 

 ing, who has founded the genus, describes no less than 

 thirty-two species, several of which probably may be de- 

 tected in this country. Whether our S. Warrenice be re- 

 ferable to any of those enumerated, I cannot say, not having 

 had the opportunity of comparing specimens; and being 

 unable to determine the point from the author's short de- 



