Algae. 365 



pigment is included in the fat. The storage of fat is regarded as an 

 adaptation against the intense eold. 



Samples of red snow are also described. 



A systematic enumeration of all the species observed concludes 

 the account, and among the forms considered as new are two 

 algae which the author places in a genus Scotiella, the diagnosis 

 of which is as follows: 



Scotiella F. E. Fritsch. Cellulae ellipsoideae in utroque üne 

 rotundatae processibus alaeformibus plus minusve longitudinalibus 

 sex aut multis minutae; alae sunt aut rectae aut undulatae; chroma- 

 tophoram singularem esse probabile est, cum pyrenoide; abundantia 

 est adipis in una specie. Propagatio subdivisione cellulae immutatae 

 aut sporae perdurantis in paucas partes verisimile est. Sporae per- 

 durantis cum membranis valde incrassatis transfiguratione cellula- 

 rum vulgarium formari videntur. 



Two species, 5. antarctica and 5. polyptera are described, and 

 the author considers that Chodat's Pteromonas nivalis is a species 

 of Scotiella, a genus which is allied to Oocystis. G. S. West. 



Fritsch, F. E., Freshwater Algae of the National Antarctic 

 Expedition (under Capta in Scott), 1902 — 04. (Nat. Hist. VI. 

 1912.) 



The collections were made in the vicinit}" of Cape Adare 

 (lat. 71° S.) and in the region around Mc Murdo Sound (nearry 

 78° S. lat.), thus being obtained from very much the same region 

 as those brought back by the Shackleton Expedition in 1907 — 9. 

 Of the 91 species observed, 52 belonged to the Myxophyceae (Cyatio- 

 phyceae). Huge sheets of Phormidium and Lyngbya were found 

 flourishing in the ice or, during the milder months, in the waters 

 of the ponds and lakes. These sheets formed a substratum for a 

 rieh growth of other blue-green algae as well as for species of 

 Pleuvococcus. More of the heteroeystous Myxophyceae were absorbed 

 in these collections than had previously been recorded for the 

 Antarctic. 



The freshwater diatom-flora was rather uniform, and the only 

 genera were Navicula, Fragilaria, and Haritsschia. 



One desmid was observed, probably a species of Cosmarium 

 [recorded as a Penium] and as yet is the only desmid recorded for 

 the Antarctic continent. 



A number of new species of Myxophyceae and diatoms are 

 described, and many interesting remarks concerning other species 

 are appended. 



A comparison is instituted between the relative abundance of 

 the different groups of algae in South Georgia and Kerguelen, 

 the South Orcknevs, and on the Antarctic Continent. 



G. S. West. 



Laureys, A., Contribution ä l'etude de quelques Algues 

 officinales. (Ann. et Bull. Soc. rov. Sc. medic. et nat. Bruxelles. 

 LXX. 5. p. 226—237. 1912.) 



L'auteur etudie d'abord Corallina officinalis, qui passe pour 

 posseder des proprietes vermifuges, mais dont on n'a jamais pu 

 isoler le principe actif. Les recherches effectuees par l'auteur prou- 

 vent que l'extrait aqueux de la coralline contient probablement un 



