ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 377 



animal, and feeds it with fat-globules, and utilises the nitrogenous 

 waste products of the animal — probably uric acid. The alga is 

 unknown in the free state. 



Archerina transferred from the Protozoa to the Protophyta.* — 

 E. Ray Lankester expresses the opinion that his Archerina boltoni, 

 described in 1885 and referred to the Protozoa, is identical with 

 Golenhinia radiata described by Chodat in 1894 and with Richteriella 

 botryoides described by Lenmiermann in 1898, and that the name 

 Archerina should therefore take precedence over the other two generic 

 names. Further, he treats of the organism Botryococcus Braunii, and 

 publishes some drawings and notes prepared twenty-five years ago. He 

 calls upon naturalists to study the plant for the elucidation of the 

 following points : — (1) whether the green colour is chlorophyll or 

 not ; (2) what is the relation of the red and yellow oil pigment to the 

 season ; (:3) how the oil passes into the jelly ; (4) the nuclear struc- 

 ture : (5) modes of reproduction other than fission. The genus Bieffi- 

 giata of West is, according to its author, probably a form of Botryococcus 

 Braunii. 



New Endophytic Alga in Nostoc.t — F. Hustedt describes a new 

 endophytic species of Bactylococcopsis, B. mucicola, a small blue-green 

 alga which grew abundantly inside the jelly of a cultivated Nostoc. 

 He contrasts it with B. rupestHs Hansg., a free-growing species, and 

 with B. montana West, which forms colonies in jelly of its own pro- 

 duction. 



Fish infested with Algse.$ — K. Minakata cites a record by A. D. 

 Hardy § of the occurrence of the green alga, Myxonema tenue Rabenh., 

 growing luxuriantly upon goldfish in a pond, and himself describes a 

 similar occurrence in the case of some diminutive fish (Haplochilus 

 latipes Schleg.) captured in a tiny pool in the Asso Marsh near Tanabe, 

 Kii. Japan. The tufts of alga were 1 cm. long, and were attached to 

 the underside of the fish. The alga is determined by G-. Massee as 

 being the same species, Myxonema tenue, and associated with it is a 

 species of the desmid Euastrum. 



Red Snow. || — G. S. West gives a short account of Sphserella nivalis, 

 the alga which causes the coloration of extensive tracts of snow in the 

 Austrian, Swiss, and Italian Alps, in Norway, South America, and the 

 two polar regions. The red colour is caused by a red pigment known as 

 hamiatochrom, which generally accompanies diminished vitality, and 

 being more stable than chlorophyll, enables the cells to exist much more 

 easily through adverse circumstances than if they were merely green. 

 The life-history of S. nivalis is briefly described, and remarks are made 

 on the specific differences between it and S. lacustris. The author is not 

 inclined to accept 8. nivalis as a species of Chlamydomonas, without 

 further knowledge of its motile state. 



* Quart. Journ. Micr. Sci., lii. (1909) pp. 423-30 (pi.). 



t Hedwigia, xlviii. (1908) pp. 140-1 (tigs.). 



% Nature, lxxix., No. 2039 (1909) p. 99. 



§ Op. cit., April 1907. 



i| See this Journal, 1909, pt. 1, pp. 28-30. 



