254 Mr. II. J. Carter on Filigerous Green 



Crumenula texta, the Thecamonads, Eudorina, Volvox, 

 Chlamydococeus, and most, if not all, the green filigerous In- 

 fusoria undergo more or less subdivision within their cells 

 respectively, for simple multiplication or multiplication by 

 sexual increase ; and the groups of cells thus formed often 

 continue together after having been liberated ; so that each 

 species may assume different phases, and thus each have its 

 own Uvella bodo. 



I have, however, never seen a subdivision of this kind in 

 Euglena viridis and its like, although I can easily conceive 

 that its family does not differ in this respect from the other 

 green filigerous Infusoria ; while certainly the figures of the 

 Uvella bodo which I have given, both in the active and un- 

 liberated state, appear to be more nearly allied to Euglena 

 viridis than to any other organism. 



VOLVOCINA. 



Hereto may also be added the conclusions at which I have 

 arrived respecting the different groups of cells figured and 

 named by Ehrenberg as distinct organisms in connexion with 

 Eudorina and the two Volvoces — conclusions to which long 

 and attentive study of these Infusoria, at different times for 

 several years successively, have brought me. 



And first as regards Eudorina elegans (tab. 3. fig. 6, 'Infu- 

 sionsthierchen '), which is represented with one cilium to each 

 cell. I have always observed two. Of figs. 1, 2, 3, 4, 5, 

 viz. Go nium pectorale, G. punctatum, G . tranquillum, G.hya- 

 linum, and G. glaucum respectively, the first three appear 

 to me to be all cell-group forms or phases of Eudorina elegans ; 

 figs. 4 & 5 seem to me to be almost too small for E. elegans, 

 and, being without colour, to be groups of some other organism, 

 if not parasiticized cells of Eudorina — that is, cells altered by 

 the presence of some endophyte (Mycetozoon). 



Of figs. 31 and 32, tab. 2, viz. Gyges granulum and G. bi- 

 partitus, given in connexion with Pandorina morum (which, as 

 will hereafter be observed, I consider a phase of Eudorina) , 

 the former appears to me to be the still form of the primary 

 cell of Eudorina elegans, and the latter the same under binary 

 division. According to Perty's view, Gyges might be the 

 still form of several kinds of Algse (p. 102, op. cit.) ; but, be 

 this as it may, a large ovoid cell like this (fig. 24), but in 

 the active state, with four cilia projecting from its smaller end, 

 two contracting vesicles at their base, an eye-spot lateral, and 

 single nucleus central (parietal ?), together with the usual green 

 and granular contents, was found in abundance, with Eudorina 

 elegans and Uvella bodo, in a recent excavation of the trap- 



