326 Algae. 



the Palmellaceae. (Ann. Bot. XXIII. 92. October. 1909. p. 573—577. 

 1 plate.) 



The alga which forms the subject of this paper is widely distri- 

 buted in all parts of the British Islands, occurring only in sub- 

 aerial habitats, generali}' - on damp rocks and stones. It forms a thin 

 mucous Stratum of a dark green colour, which when dry becomes 

 almost black and peels off the stone. The Stratum consists of large 

 numbers of thin-walled cells embedded in a colourless mucilage. 

 The cells are for the most part somewhat irregularly or obliquely 

 ellipsoid. Multiplication takes place by oblique fission, the mother- 

 cell dividing into two, or occasionally four, daughter-cells, which 

 are exactly similar to the mother-cell. Repruduction takes place by 

 the formation within the mother-cells of four, rarely eight, non- 

 motile gonidia; and also by the formation of macro- and micro- 

 zoogonidia, 2, 4, 8 or 16 of which are formed within the mother- 

 cell. Healthy cultures of the alga were successfulty grown, and it 

 was found that the number of pyrenoids was not constant, but was 

 probably dependent on nutritive conditions, and therefore of no 

 value as a systematic character. The formation of gonidia is descri- 

 bed. The systematic position of the species is discussed. It differs 

 from C. dispar Schmidle in the greater regularity of the form of the 

 cells, and in the presence of pyrenoids. A diagnosis of C.snbellipsoidea 

 is given. Stages of the life-history are figured. E. S. Gepp. 



Bloonifield, E. N., Fauna and Flora of Norfolk. Additions 

 to Part X. Marine Algae. (Transactions of the Norfolk and 

 Norwich nat. Soc. VIII. 5. p. 809. 1908/9.) 



This is a short list of 22 species additional to Mr. H. D. Gel- 

 dart's list of Marine algae of Norfolk; they were taken from the 

 Catalogue of British Marine Algae by the late Mr. Batters. 



E. S. Gepp. 



Bloomfield, E. N., The Algae of Suffolk. (Transactions of the 

 Norfolk and Norwich Nat. Soc. VIII. 5. p. 768—783. 1908—09.) 



The author gives lists of Marine algae and of Freshwater algae 

 and Diatomaceae. The former is principally founded on records 

 made by the late Mr. Batters, and consist of 135 species. The 

 coast of Suffolk is very unfavourable to the growth of algae, most 

 of it being covered with sand and shingle, while there are no hard 

 rocks. The list of freshwater species, and Diatomaceae, both fresh- 

 water and marine, is almost entirely due to the late Mr. E. Skepper 

 and has been published in Henslow and Skepper's Suffolk Flora. 

 A small collection made by the late W. West has been added. 



E. S. Gepp. 



Okamura, K., Icones of Japanese Algae. (Vol. I. 6. p. 121 — 

 146. PI. XXVI— XXX. Febr. 1908.) 



In this number the following species are illustrated: Nitophyllnm 

 uncinatum (Turn.) J. Ag. , Pterosiplionia pennata (Roth) Fkbg., 

 Endocladia complanata Harv., Asparagopsis Sarifordiana Harv., 

 Delisea japonica Okam. n.sp. , Scytosiphon lomentarius (Lyngb.)J. Ag. 



As Harvey's original diagnosis of Endocladia complanata is 

 too short, the author gives the following description. Fronds dwarf, 

 gregarious, forming widely spreading patches, filiform, terete or 



