ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 89 



the Aerophilae, Geophihe, Reophike, or those that inhabit running water, 

 Magmaphilre, or tuft-forming alga:, Paludophilse, Phytoplankton, and 

 finally, those that live at the bottom of lakes, etc. Tables are given 

 showing the Desmids and other alga3 which live in bogs, composed of 

 Sphagnum or Hypnum respectively. The paper is written in Russian. 



" Flowering " of North American Lakes.* — Marshall A. Howe 

 describes an alga which appears in great quantities at Honnedaga Lake, 

 Herkimer County, New York, and appears to be Gloiotrkliia echinidata 

 P. Richt. The same plant occurs freely at Chilson Lake, Essex County, 

 Avhere it forms small colonies, which are usually spherical. No spores 

 were found, but the resemblance between these plants and those from 

 the Plon Station, in Germany (No. 587, PhyTcotheka universalis of Hauck 

 and Richter), is so great, that there is little doubt as to their identity. 

 The Lake Chilson specimens show a greater development of terminal 

 hairs than those figured in Hauck and Richter (1. a), but the hairs vary 

 with the age of the colony, and in some stages they may be entirely 

 wanting. The colonies multiply by means of hormogonia. The author 

 makes remarks on the " flowering " of other American lakes and on the 

 synonomy of Gloiotrkliia echinulata. 



New England Desmids.j — J. A. Cushman records 30 species of 

 Desmids found by him in Steep Brook, Massachusetts, about three miles 

 north of Fall river railway station. Staurastrum was well represented 

 in the collection. Notes on the measurements and other points of special 

 interest follow each species' name, and a bibliography of New England 

 Desmids completes the first of a series of papers on this subject. 



The second paper gives two lists of Desmids from New England, one 

 locality being in Massachusetts, the other in Maine. The first contains 

 20 species, the second 25 species, both lists including records formerly 

 doubtful. 



Fresh-water Algae from Brazil and Paraguay.} — 0. Borge has 

 worked out the collection of Desmidiacea? brought home by the Regnell 

 Expedition, and publishes the results, including descriptions of 28 new 

 species and some new varieties. A list of 55 localities is given, of 

 which 44 are in Brazil, and the remainder in Paraguay. 



The same author records eleven species of Zygnemaceas and Meso- 

 carpaceaa from the same collection, including two new species, Spirogyra 

 paraguayensis and Gonatonema splmrospora. 



Diatoms New to the Hull Districts — R. H. Philip adds some 

 new records to the diatoms already known from this part. The rock 

 pools at Filey, and the flats east of Cleethorpes on the Lincolnshire 

 coast, have yielded good material. The most interesting find was 

 Surirella medulka Per., from a ditch in the low-lying country between 

 the wold i and the Market "Weighton canal, called Hotham Carrs. 

 Some of the frustules show an indentation on one side of the valve, 

 and a specimen of this form is figured, together with a typical specimen. 

 Many other species are figured in a plate. 



• Torreya, iii. (1903) pp. 150-4. f Rhodora, v. (1903) pp. 221-5, 252-5. 



X Arkiv. Bot. Stockholm, i. (1903) pp. 71-138, 277-86 (pis. 1-5, 15). 



§ Trans. Hull tfci. & Field Nat. Club, iii. (1903) pp. 110-14 (pi. xi., rip. in text). 



