80 SUMMARY OF CURRENT RESEARCHES RELATING TO 



touch the bottom in many places with his oar. From this lake the 

 author records 35 species of Mastigophoras, Peridinieae, Bacillarieas, 

 Chlorophycese, and Myxophycea?. Some of these had not been pre- 

 viously recorded from that locality. From Lake Izsnik-Gol, or the 

 Lake of Nicea, 26 species are enumerated, including a new variety, 

 recta, of Anabcena spiroides Kleb. From the Lake of Sapandia, which 

 had never been examined for phyto-plankton, the author records 2H 

 species as the result of 5 days' haul. As a result of the examination 

 •of these lakes A. Forti holds that a lake of which the area does not 

 correspond to an adequate depth, fails to show a true and proper limno- 

 plankton. He also considers that his results strengthen Ostwald's 

 theory of the gradual diminution of plankton from the pole to the 

 equator. 



Chrysomonadinese.* — A. Scherffel contributes three interesting notes 

 to our knowledge of this order. The first is on those species which 

 possess the power of taking up animal organisms for nourishment, 

 though possessing chromatophores. The number of these species is 

 larger than had been supposed. The author has himself watched a fine 

 group of twenty-one well developed Chrysamcebce, which contained 

 various bacteria and other extraneous bodies ; and one of them was 

 observed in the act of annexing to itself a fair-sized Navicala. The 

 second note deals with a form of MaUomonas with two cilia, closely 

 allied to M. acaroides Perty. The author suggests that this may perhaps 

 explain Stein's assertion that he had seen M. acaroides with two cilia. 

 The question as to a connection between MaUomonas and Synura is 

 still doubtful, and the views of various authors on the point are dis- 

 cussed. The third note is entitled "The eye-points (Augenpwikte) of 

 Synura and Syncrypta" The two genera are regarded as quite distinct, 

 though closely allied. One main difference is the common gelatinous 

 envelope in Syncrypta, which encloses the whole colony. This does 

 not occur in Synura. The so-called " Auyenpunhte " of both genera 

 may be nothing but pigment-drops. 



Bachmanx, H. — Botanische Exkursionen im Golfe von Neapel. 



Jahresber. Hohern. Lehranst. Luzern, 1903-4, 53 pp. (illus.). 



Bolochontzew — Phytoplankton der Seen im Zreise Rostow. (Phytoplankton of 

 lakes in the district of Rostow.) Zemlewevenje, 1904. 



Cushman, J. A. — Desmids from Newfoundland. 



[A list of 20 species from Rose au Rue, including two novelties — Euastrum 

 Allenii and Micrasterias con/erta var. nov. Novx-terrx.~\ 



Bull. Torrey Bot. Club, xxxi. (1904) pp. 5S1-4. 



F kitsch, K. — Botanische Section des naturwissen schaftlichen Vereins fur Steier- 

 mark in Graz. (Botanical section of the Natural Science Society of Styria in 

 Graz.) 



[Records the finding of (Edogonium undulatum in ponds near Wandschuh, by 

 Graz.] Oexterr. bot. Zeitschr., liv. (1904) p. 191. 



Heeking, W. — Ueber einige Siisswasseralgen Schleswig-Holsteins. (On some fresh- 

 water alg?e of Schleewig-Holstein.) 



MM. Altona Mus., 1904, pp. 1-32 (25 figs.). 



* Rer. Deutsch. Bot. Gesell., xxii. (1904) pp. 439-44. 



