266 Dr. A. Gruber on Protozoa. 



G. S. xxxix. tab. iii. fig- 6). Not common in the Lower 

 Argovian beds* 



11. Test fixed, more or less cylindrical, small, bearing a 

 small number of short papiilse regularly disposed round the 

 margin of the chamber. Cement hyaline. Rare, in the 

 Upper Jurassic sponge-beds (tig* 28, and Neues Jahrb. 1883, 

 tab. iv. fig. 12). 



Brady mentions an interesting polythalamous form, two or 

 three chambers btfing adherent to each other. I have not been 

 able to find similar specimens in the Jurassic beds ; but it is 

 possible that they occur, especially in the sponge-beds, with 

 numerous spherical varieties, but that the single chambers are 

 broken off during the preparation. As an interesting fact, we 

 must mention that several specimens were found with a second 

 interior chamber, similar to those described by Brady. 



Trusting that these few remarks on a very important but still 

 little known arenaceous form may give new proofs of the con- 

 tinuity of certain species and of the great variety of Foramini- 

 fera, I must express my thanks to all the gentlemen who 

 have assisted me by sending specimens for comparison, wash- 

 ings from Jurassic rocks, samples of limestones, and notes on 

 the occurrence and different varieties of T. jpapillata. 



XXXVI. — Investigations upon some Protozoa. 



By Dr. August Gruber*. 



[Plate XIII.] 



The present memoir consists of several sections which stand 

 in no direct connexion with each other, and extend over 

 various regions of Protozoology. The first part is devoted to 

 the description of some new Rhizopods, which will be found 

 interesting in several respects ; in the second some Infusoria, 

 partly new, partly not well known, will be described ; and 

 the last section will treat of some peculiar phenomena of union 

 in Heliozoa. 



Besides the observation of the living animal, 1 have availed 

 myself of the mode of preparation described by Korschelt f, 



Translated by W. S. Dallas, F.L.S., from the 'Zeitschrift fiir wis- 

 senschaftliche Zoologie,' Ed. xxxviii. pp. 45-70. 



t " Leber eine neue Methode zur Konservirung von Infusorien und 

 Amoben/' Zool. Anzeig. no. 109. 



* 



> 





