ZOOLOGY AND BOTANY, MICROSCOPY, ETC, 607 



was not identical with the organism described by Traunsteiner. A thaw 

 partially melted the top snow, and renewed frost covered this with 

 a second ice-sheet. Frozen into this were found large curves of greenish- 

 red algfe, 10 m. long, 20 cm. broad, and 7 cm. thick. The frozen 

 colonies were frothy in character. The author describes the Dino- 

 flagellate as a new species, Glenodinium Pascheri. The external form 

 and special morphology of the various stages are figured. Further 

 physiological investigations are being made. 



Chromulina RosanofFii.* — J. Buder records having found this alga, 

 which was described as a rare one by Miyoshi, growing on clear sheets 

 of water in all the German mountains of medium height. At certain 

 seasons it is of very frequent occurrence. He describes the origin of 

 the characteristic glitter of the alga, according to Woronin (1880) and 

 Molisch (1901). It is to be explained in the same way as the brilliance 

 of the moss Schis.tostega osmundacea. 



CoccolithophoridsB.t — J. Schiller describes the present state of our 

 knowledge of the Coccolithophoridse. They are coloured flagellates, the 

 body of which is composed of a calcified shell formed of separate 

 calcified plates. The author describes the external form, cell-membrane, 

 protoplasm, chromatophores, vacuole, and shell-structure of these 

 organisms. Their manifold shape is shown in ten figures. The 

 Coccolithophoridaj reproduce themselves by the formation of swarm- 

 spores, in which the tetraspore appears to predominate. The author 

 has also observed the formation of resting spores. Observations are 

 made on the capture and preservation of CoccolithophoridEe. The 

 ecology of the group is only known in its rough outlines. Although 

 they are recorded from all seas, they have only so far been studied from 

 the Atlantic and the Mediterranean. On the voyage of the " Deutsch- 

 land " Lohmann found the Coccolithophoridse, together with the 

 Diatoms, the commonest of the plants in the region traversed, and 

 when, in the tropics, the diatoms became less frequent, the Coccolitho- 

 phoridag occupied the first place in the phytoplanktou. 



Plankton of the Swedish Expedition to Spitzbergen, 1908. J — 

 H. Broch reports on the plankton of the Eisfjord during the summer of 

 1908, collected by the Swedish Expedition to Spitzbergen. This is the 

 first time that the plankton of a fjord in the high arctic regions has 

 been thoroughly worked out. Arctic-neritic species predominate. 

 "Widely distributed are : Dinoinjon pellucidum, Goniodoma Ostenfeldi, 

 Peridmium Irevipes, P. curvipes, P. isJcmdicum, P. monacanthus, 

 P. pellucidum. Among the commonest of the arctic-oceanic species is 

 Ceratium arcticum. Many of the boreal species have a partially southern 

 character, such as Dinophysis acuta, Peridmium depressum, P. ovatum, 



* Naturw. Wochenschr., n.f. xv. (1916) pp. 94-5 (2 figs.). See also Bot. Cen- 

 tralbl., cxxxiv. (1917) pp. 10-11. 



t Die Naturw., iv. (1916) pp. 277-83 (figs.). See also Bot. Ceutralbl., cxxxiv. 

 (1917) p. 25. 



I Vet.-Ak. Handl. Stockholm, xlv. (1910) pp. 25-67 (1 map and figs.). See also 

 Bot. Centralbl., cxxxiv. (1917) pp. 53-4. 



