AMONG SIMPLE SAECODE ORGANISMS. 



277 



Some otlier forms have been described by Archer* as species 

 of Amphizonella, but which, unlike the terresti'ial species disco- 

 vered by Grreeff, are inhabitants of fresh water. The A. vestita of 

 Archer, however, is, as shown by Hertwig and Lesser, not refer- 

 able to Grreeff's Amphizonella, and is regarded by these observers 

 as identical with their own Cochliopodium pelhicidum. They rec- 

 tify Archer's description, and point out the causes of error by 

 which be was deceived in his attempts at identification. 



The complete disappearance in the different species of Am- 

 phizonella of the apertures caused by the pseudopodia in boring 

 their way through the outer coat reminds us vividly of the 

 phenomena which have been proved to accompany the migra- 

 tion of the blood-corpuscles through the coats of the capillaries 

 in the higher animals. 



Fiff. ('.. 



Cochliopodium pellucidum, viewed from the side, with widely open test-orifice, 

 through which numerous pseudopodia are projected. (After F. B. Schulze.) 



Hertwig and Lesserf describe, under the name oi Oocliliop odium 

 pellucidum (fig. 6), a very interesting Rhizopod which they found in 

 great quantity in ditches at Eeinhardsbrunuen and in a pond in the 

 Botanic Grardens at Bonn. They have identified it with Archer's 

 spineless variety of Amphizonella vestita, which they regard aa 

 having nothing which would justify a subordination of it to Greeft"'s 

 genus Amphizonella. 



It consists of a nucleus-bearing protoplasm bodj' which, not- 



* Quart. Journ. Micr. Sci. vol. xi. 1871. t Loc. cit. 



TAJfK. JOTJEN.— ZOOTiOGT, VOL. XITT. 24 



