ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 599 



In Article No. 12 he treats * in like critical fashion of Fossombronia 

 cristula, LophocoJea alata, Gephalozia catenulata, G. macrostachya, Cepha- 

 loziella spmicaulis, Calypogeia paludosa. 



The same author | publishes a preliminary list of forty-one Colorado 

 Hepatic*, representing an addition of twenty-three species to the flora. 



Mosses of West Coast of South America. $ — R. S. Williams 

 publishes a list of mosses collected by J. N. and Mrs. Rose in Peru, 

 Bolivia and Chile in 1914. Several of the forty-one species are of 

 interest, being from the dry cactus region of the west coast of South 

 America. Ten species are described as new to science ; and two of 

 these belong to a new genus, Pseudocrossidium, the leaves of which are 

 remarkably revolute above — -even twice revolute in P. apiculatum. 

 Figures illustrating the structure of the new species are supplied. 



Bryophyta of New Caledonia.§— I. Theriot reports on the mosses 

 collected in New Caledonia and the Loyalty Islands by F. Sarasin and 

 J. Roux in 1911-12. He records forty-two species, two of which are 

 new to science — Macromitrium Sarasini (from New Caledonia) and 

 Isopterygium Sarasini (from Loyalty Islands). Descriptions of these 

 are given. 



F. Stephani || has determined the Hepatics of the same expedition : 

 two in number, Aneura viridissima and Acolea caledonica, the latter a 

 new species. 



Thallophyta. 

 Algae. 



(By Mrs. E. S. Gepp.) 



Glaucocystis nostochinearum.H- B. Millard Griffiths describes the 

 structure of Glaucocystis nostochinearum Itzigs., a unicellular solitary 

 alga found in Sphagnum bogs. It is ellipsoidal, 30-45/* long by 18-25/* 

 wide, with a small polar thickening within each end, and an equatorial 

 external thickening. The cell-wall is mainly of cellulose. The chroino- 

 plast consists of strongly recurved and radiating blue-green bands, which 

 break up during cell-division. Two, four or eight daughter-cells are 

 produced within the mother-cell. During the resting stage the nucleus 

 is " open," a spherical mass of delicate reticulate protoplasm which does 

 not take stains. It is distinguished from the general cytoplasm by con- 

 taining no metachromatin granules. It lies close against the cell-wall. 

 During the division stage the nucleus contracts, becomes coarsely reticu- 

 late, moves to the centre of the cell, and becomes stainable. Chromatin 



* Rhodora, xvii. (1915) pp. 107-20. 



+ Bryologist, xviii. (1915) pp. 44-7. 



% Bull. Torrey Bot. Club, xlii. (1915) pp. 393-404 (5 pis.). 



§ F. Sarasin and J. Roux, Nova Caledonia. Botanique. I. Wiesbaden : Kreidel 

 1914, pp. 23-32. 



II F. Sarasin and J. Roux, Nova Caledonia. Botanique. I. Wiesbaden : Kreidel 

 1914, p. 19. 



f Ann. Bot., xxix. (1915) pp. 423-32 (1 pi.). 



