COCCOCHLOKIS. 441 



Grev. Alg. Brit. p. 177. ; Hook. Br. Fl. vol. ii. p. 316. ; 

 Wyatt, Alg. Danm. No. 167. Conf. fusco-purpurea 

 Dillw. t, 92. ; E. Bot. t. 255. Conf. atro-purpurea 

 Dillw. t. 103. ; E. Bot. t. 2085. Eangia atro-purpurea 

 Harv. p. 172. 



Hob. Grand Canal, near Dublin : W. H. Harvey. 



Between this production and Lyngbya zonata there is a 

 great structural resemblance, and assuredly the two species 

 do not differ generically from each other. 



The interesting discovery of this being a freshwater pro- 

 duction was made by Mr. Harvey, who states that the locality 

 in which he gathered it had no communication with the sea. 



COCCOCHLORIS CYSTIFERA HttSS. 



Plate CIII. Fig. 3. 



Char. Granules rather large, mostly oval, contained in mucous 

 cysts, each cyst being occupied with either one or two, but 

 sometimes, four granules. 



Hob. Near Bristol : Mr. Thwaites. 



This and the two following species are particularly inter- 

 esting, from the fact of their exhibiting a cysted structure, 

 whereby a close relation is manifested in these species to 

 H&matococcus, and which structure moreover it is probable 

 does in reality belong to all the species of the genus Coccochloris, 

 but which escapes detection from the exceeding delicacy of 

 the organisation of many of the species. 



COCCOCHLORIS VARIABILIS Hass. 

 Plate CIII. Fig. 4. 



Char. Granules in the dried condition not having any regular 

 form, rather small. Cysts somewhat large, containing 

 one, two, or four granules, mostly spherical. 



Hob. On thatch, Northiam : Mr. Jenner. 



