Algae. 401 



Grün., Schmidtiella elongata Schröd., Eucampia Zodiacus Ehr., and 

 forma Schröder Phyt. Warm. Meere f. 18, E. cornuta (Cl.) Grün., E. 

 biconcava (CI.) Oslf., Clirnacodiuni Frauenfeldianuni Grün., Ditylium 

 Sol va.n Heurck, Triceratium tumescens Castr., T. arecticum ßtw. var. 

 japonica, T. {Amphitetras) ciispidatum Janisch, T. antediluvianum 

 (Ehr.) Grün., Biddulphia Biddulphiana (Smith) Boyer., B. Tuomeyi 

 Bail., B. Gruendleri Schm., B. reticulata Roper var. inennis Castr., 

 B. longicniris Grev. var. sinensis Grev., Isth>nia enervis Ehr., 

 Cerataulina compacta Ostf., Hemiaulus Heibergti Cleve, Rutilaria 

 edentula Castr., Rhabdonernn adriaticiim Kütz., Tahellaria unipiinc- 

 tata Schutt., Gratnmatophora niari^ia (Lyngb.) Kütz., Climacosphaenia 

 moniligera Ehrenb.? Astevionella japoyiica Cleve, Streptotheca indica 

 Karsten. Okamura. 



Siddall, J. D., Notes on the Life-history of some Marine 

 Diatoms from Bournemouth. (Journ. Roy. Micr. Soc. IV. 

 p. 377-381. 2 pl. August 1912.) 



The author gives an account of living diatoms captured by 

 surface-netting from the sea at Bournemouth, especially of a small 

 yellow Coscinodiscus, to which he gives the name C. heliosoides to 

 distinguish it as a species or variety from C. radiatus. This diatom is 

 beset with exceedingly delicate pellucid pseudopodialfilaments varying 

 in length up to 5 or 6 times the diameter of the frustule. Apparently 

 they are produced by the very youngest examples, and later become 

 Ktiffened and probably somewhat silicified; but still they function as 

 tactile Organs, being coated to their tips with a layer of living pro- 

 toplasm. They emerge through canals in the cell-wall. Three modes 

 of reproduotion occur; 1) the ordinary method; 2j liberation of chro- 

 moplasts in protoplasm from inside the frustule; 3) detachment of 

 granulär protoplasm from outside. Ethel S. Gepp. 



Tyson, W., New South African Marine Algae. (Journ. Bot. 

 L. p. 199-200.) 



Descriptions by Major Th. Reinbold of the following three 

 new marine algae from the Cape Colony: Rhahdonia natalensis, 

 Nemalion furcellatum , Gigartina Tysoni; with some critical notes. 



Ethel S. Gepp. 



West, G. S., Algological Notes.^ X -XIII. (Journ. Bot. p. 321— 

 331. 5 figs. Nov. 1912.) 



X. Observations on CEdogoniiim rivulare (Le Cl.) A Br. and 

 (E. fonticola A. Br., both of which were found in Warwickshire 

 with zoogonidia and sexual organs. (E. fonticola possesses small 

 male plants intermediate between those of macrandrous species and 

 the dwarf males of nannandrous species. There is some evidence to 

 Show that the dioecious nannandrous species have probably arisen 

 from the macrandrous species through such forms as CE. fonticola. 

 This is in agreement with Hirr's suggestions in 1900, but not with 

 Pascher's conclusions in 1906. It was also found that the free- 

 floating young plants, developed from zoogonidia, remained mostly 

 unicellular and possessed a much greater development of holdfasts. 



XI. Resting-spores were observed in Surirella spiralis Kütz. in 

 Tanuary, 1908. The specimen, which is figured, was found in a 



Botan. (^entraiblatt. Band 122, 1913. 26 



