682 SUMMARY OF CURRENT RESEARCHES RELATING TO 



less common in the south. Kemarks are made on the occurrence, 

 geographical distribution, etc., of the most important species. No 

 novelties are mentioned. 



Balsa mo, F. — Primo elenco delle Diatomee del Golfo di Napoli. r ( Firet list of 

 Diatoms from the Gulf of Naples.) 



Bull. Soc. Nat Napoli, xvii. (1903) pp. 228-41. 



Davis, B. M. — Oogenesis in Vaucheria. 



Bot. Gazette, xxxviii. (1904) pp. 81-99 (2 pis.) 



Drost, A. W. — Pleuroeoocus vulgaris Menegh. als endophytisch levende wier. 

 (P. vulgaris as an endophytic alga.) 



[The author finds small wart-like swellings on the needles of Abies Pinsapo 

 and Picea excelsa, caused by colonies of Pleurococcus vulgaris, which push 

 up the epidermis.] 



Tijdscliri/t over Plantenziehten, x. (1904) pp. 71-3 (1 pi.). 



Ernst, A. — Zur Eenntniss des Zellinhaltes von Derbesia. (On the cell-contents of 

 Derbesia.) 



[The author finds very large crystals of calcium oxalate of 

 regular shape in D. tenuissima.] 



Flora, xciii. (1904) pp. 514-32. 



, Die Stipnlarblatter von Nitella hyalina (D.C.) Ag. (The stipulary 

 leaves of N. hyalina.) Vierteljahrschr. Natur. Gesell. Zurich* 



xlix. (1904) pp. 64-114 (1 pi.). 



Falcon, B. C. — Los misterios de la naturaleza: investigaciones sobre el micro- 

 plankton de la ria de Arosa. (The mysteries of nature : investigations into the 

 microplankton of the Arosa Biver.) La Coruna, 1904, 175 pp. (1 map, 293 figs.). 



Fi rth, W. A. — Diatomaceae. 



[A note on five species of Diatoms encrusting some molluscs (Planorbis), 

 dredged in a pond near Kilmacowan, Co. Sligo.] 



Irish Naturalist, xiii. (1904) p. 214. 



Fournier, Abbe — L'etude des Algues. (The study of Algse.) 



Bull. Soc. Bot. Deux-Sevres, Bull. xv. [1903] 1904, pp. 173-8. 



Frank, The odor— Cnltur und chemische Reizerscheinungen der Chlamydomonas 

 tingens. (Culture and chemical stimulus-phenomena in C. tingens.) 



Bot. Zeitschr., lxii. (1904) pp. 153-88 (1 pi.) 



Gran, H. H.— Diatomaceae from the Ice-Floes and Plankton of the Arctic Ocean. 



In F. Nansen's The Norwegian North Polar Expedition. 



1893-96, iv. (London, 1904.) 



„ „ Die Diatomeen der Arktischen Meere. I Teil. Die Diatomeen des 



Planktons. (Diatoms of the Arctic Ocean. Part I. Diatoms of 

 the Plankton.) Fauna Arctica, iii. (1904) pp. 511-54 



(1 table and 6 figs, in text). 



Hirn, K. E. — Zur Zenntnis der Desmidiacese Finnlands. (Contribution to a know- 

 ledge of the Desmids of Finland.) Act. Soc. Faun, et Fl. Fenn. Helsingfors. 



1903, 24 pp. (2 pis.). 



K ! jel lm an, F. B.— Om Alvegetationen i Skelderviken och angransande Kattegatts- 

 ' onwade. (On the algal vegetation in Skelderviken and the neighbouring parts. 

 of Kattegatt.) 



[Mentions a new species of Phlazospora, but gives no description.] 



Medd. fr. Kgl. Landbruksst, ii. (1902) pp. 71-81. 



Kuckuck, P.— Bericht uber eine botanische Reise nach Marokko (Account of a 

 botanical iourney to Morocco.) Wiss. Meeresunters. Kiel und Biol. Anst Alt 



Helgoland, v. (1904) pp. 107-15. 



Langeron — Note sur le role phytostatique et la floculation naturelle des enx 

 limonenses. (Note on the phytobtatic character and natural flocculation of 

 muddy waters.) Bull. Soc. Bot. France, li. (1902) pp. xxvii-xl 



