FLAGELLATE INFUSORIA AND ALLIED ORGANISMS. 63 



addition to the examples from North Atlantic localities, 

 obtained by the scientific staffs of the " Porcupine" and the 

 " Valorous/'' fine specimens have been found in many of the 

 " Challenger" dredgings, namely, from off the Canaries and 

 from the West Indies ; from two or three stations in the 

 South Atlantic ; from the South Pacific (off New Zealand) ; 

 and from the Eastern Achipelago. The depths of these 

 soundings range from 350 fathoms to 1900 fathoms, but the 

 largest specimens occur on bottoms of less than 700 fathoms. 

 A very interesting modification of the type — perhaps only 

 a variety — occurs in deep water oflf the coast of South 

 America. It is somewhat smaller than the common form, 

 and differs from it in general contour and in colour. Its 

 shape is nearly globular, so that it may be regarded as an 

 isomorph of Nonionina pompilioides ; it is of a beautiful 

 grey hue, and the surface presents almost more than the 

 normal glossiness. 



Researches ow the Flagellate Infusoria and Allied 

 Organisms. By O. Butschli, Professor of Zoology in 

 the University of Heidelberg.i 



Professor Butschli points out the value of a careful 

 study of the Flagellata, some of which appear to be more 

 nearly allied to the vegetable than to the animal kingdom. 

 He concludes his preface with a hope that he may be able at 

 a future time to amplify the present record. 



I. — The True Flagellata. 



Spumella.— Cienkowski (" Ueber Palmellaceen und 

 einige Flagellaten," ' Arch, fiir mikr, Anat.,-* Bd. vi, 1871, 

 p. 432). 



Small Flagellata, which, so far as is known, are colourless. 

 They are either free-swimming, or are temporarily attached 

 by a threadlike prolongation of the hinder end of the body. 



* Abridged from a paper in the •Zeitschrift f. Wissensch. Zoologie,' Bd, 

 XXX, by D'Arcy Power, B.A., Exeter Coll., Oxford. 



