110 • University of California Publications. [Zoology 



The following tabular comparison of characters will facilitate 

 the separation of T. ramiciformis and T. exilis. 



Ratio of 



. length and Distance between antapicals 



. f ^^rJv^ ilorso-ventral at level of at level of Major flexure 



diameter of tips midbody 



of neck 



midbody 



T. exilis 



12° 3.2:1 ^;^^.Tvf*J' ^f^-f^^"^^ Diffused 



of midbody or midbody 



T, . .J. . cao oil 2 leng:ths of 2.5 lengths t ^^„^^^A 



T. ramiciformis 24 3.1:1 ^^i.fbody of midbody Localized 



Zoological Laboratory , University of California. 

 October 3, 1906. 



LITERATURE CITED. 



Kofoid, C. A. 



:06. Eeports on the Scientific Eesults of the Expedition to the Eastern 

 Tropical Pacific, in charge of Alexander Agassiz, by the U. S. 

 Fish Commission steamer * * Albatross, ' ' from October, 1904, to 

 March, 1905, Lieutenant-Commaiuler L. M. Garrett, U. S. N., 

 commanding. Preliminary Report on the Dinoflagellidia, Bull. 

 ^ I\[us. Comp. Zool. Harvard College. 



Murray, G., and Whitting, F. G. 



'99. New Peridiniaoeae from the Atlantic. Trans. Linn. Soc, London. 

 Botany (2), A'^ol. 5, pp. 321-342, tables I-IX, pis. 27-33. 



SchiJtt, F. 



'93. Das Pllanzenleben der Hochsee. 70 pp., 35 textabb., 1 Karte. Kiel 

 uud Leipzig. 



