422 SUMMARY OF CURRENT RESEARCHES RELATING TO 



details of Bornetella oligospora, B. capitata and its form f. hrevistyUs, 

 Acetahidaria caraibica, A. jmsilla, f. Solmsii, A. parvula. 



Green and Red Snow of the Antarctic* — L. Gain gives an account 

 of the green and red snow collected by him in the Antarctic regions. 

 N. AYille has recognized four new species in the material — namely, two 

 species of Myacanihococciis (a problematic genus formed of colourless 

 cells), Pseiidotetraspora Gainii, and Chlamydomonas antarcticus. The 

 green snow contains seven species, and the red snow contains two. 



Green Algse of North America. f — F. S. Collins publishes a supple- 

 mentary paper on the Green Algas of North America, bringing his book, 

 which was published in 1909, up to date. All the work on the subject 

 which has appeared in the meantime is incorporated, often with critical 

 or explanatory notes. Keys to genera and species have been extended 

 and new figures added. New species and forms are described, and a list 

 is given of additional species distributed in the Phycotheca Boreali- 

 Americana. 



Spitzbergen Fresh-water Algae. J — 0. Borge publishes a list of the 

 fresh-water algte of Spitzbergen, including many new records and two 

 new species. 



Indian Fresh- water AlgaB.§ — W. West describes three new species 

 of fresh-water algte gathered in association with Polyzoa in Orissa and in 

 the Bombay Presidency ; and N. Annandale adds notes on the circum- 

 stances in which these algie occur. In two cases there appears to be a 

 symbiosis with the Polyzoa. 



Fresh-water Algae of Queensland and Madeira. |1 — 0. Borge con- 

 tinues his notes on fresh- water algffi. No. (i is a list of some species 

 collected in Queensland by Bancroft, including three new varieties. 

 No. 7 is a list of nine species collected in Madeira by Lindmann. 



New Myxophyceae.lf— A. Forti describes two new species of Myxo- 

 phyceaj — Aphanizomenon ovalisporum, which differs from its congeners 

 in the appearance of the spores, which resemble certain species of Ana- 

 bsena : it was found in a lake near Constantinople. The second new 

 species is A. aphanizomenoides, from a lake near Nicea in Anatolia. 



Notes on the Marine Algas of North America.**— F. S. Collins 

 publishes No. 10 of his Notes on Algas, and describes therein a new 

 species of Dermocarpa, D. VicJcersise, which grows on Dictyopteris deli- 

 catula in Barbados. Another novelty is Ghantransia Dufourii, growing 

 on Sargassnm vidgare on the coast of North Carolina. It appears to be 

 the GaUithamnion Lenormandi, distributed by Dufour in the Erbario' 

 Crittogamico Italiano, No. 953, from the Mediterranean. A new form 

 of Ahnfeldtia plicata is described from Massachusetts, and several species 

 of Acrochsetium are transferred to Ghantransia. 



* Bull. Mus. Hist. Nat. Paris (1911) 4 pp. 

 t Tuft's College Studies, iii. (1912) pp. 69-109 (2 pis.). 

 : Vidensk. Selsk. Skrift. (1911) p. 39 (1 pL). 

 § Journ. Proc. Asiatic Soc. Bengal, vii. (1911) pp. 83-4. 

 11 Bot. Notiser (1911) pp. 197-207 (1 pL). 



^ Atti Accad. Agr. Sci. Verona, ser. 4, xii. (1911) 3 pp. (1 pi.)- 

 ** Rhodora, xiii. (1911) pp. 184-7. 



