134 THE SHORTER SCIENTIFIC PAPERS 



TABLE OF GENERA. 



A^ Cells comparatively smooth or at least not developing acute 

 processes or spike-like appendages; colonies with cells regular- 

 ly arranged, usually approximating the form of a sphere, 

 which may be extremely flattened. 



B^ Colonies formed of 16 cells; form not that of a true 

 sphere. 



C^ Cells arranged in groups of fours, the groups not 



contiguous; colony not flattened. 



1. Gen. Eutetramorus 

 C^ Cells not arranged in groups of fours; contiguous; 



colony flattened 2. Gen. Phytonwrula 



B^ Colonies formed of 2-32 cells; form approximately 

 spherical 3 . Gen. Ccelastrnm 



A^ Cells developing acute processes or provided with acute or 

 spike-like appendage processes; colonies with cells not reg- 

 ularly arranged, not approximating the form of a sphere. 



B^ Cell walls gradually narrowed into an acute process. 



4. Gen. Burkillia 



B^ Cells provided with spike-like appendages or elongate 

 processes 5 . Gen. Sorastrum 



BIBLIOGRAPHY 



191 J. Brunnthaler, J. Die Siisswasser-Flora Deutschland, Oesterreichs, und der 

 Schweitz, Hft. J, p. 1913, (G. Fischer, Jena.) 



1914. KoFoiD, C. A. Phytomorula regularis, A Symmetrical Protophyte related to 

 Coelastrum. Univ. of Calif. Pub., Botany, V. 6, No. 2, p. 3 5-40, Pi. 7. 



1907. West, W. and West, G. S. Fresh-water Algae from Burma, including a 

 few from Bengal and Madras. Ann. Roy. Bot. Gard. Calcutta, V. 6, Pt. 2. 



1916. West, G. S. Algae, p. 205 and 243 (Cambridge University Press), Cam- 

 bridge, England. 



