CRYPTONEMIACE^. 183 



Kallymenia microphylla. The small-leaved Kally- 

 menia. 



Frond " kidney-shaped, broadly expanded ; conceptacles 

 emerging from one side only, nearly flat above." 



I have extracted the description of this species from 

 Dr. Gray's ' Handbook of British Water-weeds/ where 

 it is inserted on the authority of Professor Agardh. I 

 have never seen a specimen, nor am I aware that the 

 species has been included in any previous work on 

 British Algae. 



Genus LXXXIII. GIGARTINA, 



Frond cartilaginous, flat or cylindrical, simple or branched, 

 composed of cylindrical, jointed fibres, arranged in a loose 

 network, surrounded by a bark formed of necklace-like, 

 forked filaments, set in gelatine. Spores roundish, arranged 

 in confluent masses, in a pseudo-pericarp, formed of closely 

 interwoven filaments, in external, globose conceptacles, 

 which are furnished with a terminal pore ; tetraspores cru- 

 ciate, arranged in somewhat prominent masses, beneath the 

 surface cells. — Gigarthsta, from the Greek gigarton, a grape 

 seed. 



This genus is nearly allied to Chondrus, which it re- 

 sembles in general character. The Giyartinoi may be 

 distinguished by their external conceptacles, and by the 

 pseudo-pericarp in which their spores are enclosed. 



Gigartina acicularis. The needle-branched 

 Gi gar tin a. 



Root disc-like, with branching fibres; fronds two to four 

 inches high, as thick as small twine, irregularly branched ; 

 branches short and spine-like, or lengthened, and furnished 

 with a second series, always acutely pointed. Spores in 



