238 CRYPTOGAMIA 



chinsia stricta, LYNGB. Bydroph. Dan. 115. t. 36. Conferva siricta, 

 DILLW. Conf. p. 83. t. 40. 



Hab. On rocks in coves near high-water mark, abundant. 



Grows in dense tufts 2 or 3 inches in height, and the com- 

 ponent filaments rise nearly to a level. The colour of the 

 whole is a dark red, but individual filaments are a fine pel- 

 lucid rose-red, very distinctly articulated, with 2 or 3 lon- 

 gitudinal tubes. These sometimes cross each other, and 

 are apparently interrupted in their continuity at each 

 joint, which is pellucid. The branches come off at an 

 acute angle, and are never collected into pencil-like tufts, 

 or even much crowded ; the ultimate ones, as LYNGB YE 

 correctly remarks, are very seldom fibrilose Adheres to 

 paper, but not very closely. The specific character given 

 by LYNGBYE is inapplicable, but his extended description, 

 as well as his figure, surely belong to this species. 



7. P. urceolata, " deep red ; filaments capillary, very much 

 branched, bushy ; branchlets short, spreading ; joints of the main 

 branches long, those of the ramuli short ; tubercles subpeduncu- 

 late, urceolate." GREV. FL Edin. 309. Conferva urceolata, 

 DILLW. Conf. p. 82. t. G. Hutchinsia urceolata, HOOK. Scot. ii. 88. 



Hab. On the stems of Laminaria digitata^ rare. 



8. P. allochroa, red, csespitose, much branched, strongly marked 

 with the longitudinal tubes ; branches dichotomous ; branchlets 

 subfasciculate, fibrilose ; articulations of the main filaments long, 

 those of the branchlets equal to their diameter. LOUD. Encycl., 

 No. 15237. Conferva fibrata, DILLW. Conf. p. 84. t. G. 



Hab. On the sides of the coves along the coast. 



The name to our specimens of this and the preceding was 

 attached by Mr ARNOTT, otherwise I would not have ven- 

 tured in giving them insertion in this place, for I have 

 not of late had an opportunity of examining recent speci- 

 mens, and when dried it is a very difficult matter to de- 

 termine the species of so intricate and yet so beautiful a 

 genus. 



142. CERAMIUM. 



1. C. elongatum, dull red, somewhat opake, dichotomously and 

 rather diffusely branched ; branches spreading, the ultimate ones 



