228 Mr. H.J. Carter on the Organization of Infusoria, 



to see the nucleus and its capsule in their original form when the 

 spermatozoid mass has been present, though I have occasionally, 

 in Amceba, and almost always in Euglypha^ seen the empty glo- 

 bular capsule in connexion with the latter. In Amosba, before 

 the spheroidal divisions of the nucleus have separated from each 

 other, they frequently appear in the form of a botryoidal mass, 

 projecting from one part of the capsule. 



But, as regards the ovules, although they are also unquestion- 

 ably developed around the globular capsule of the nucleus in 

 Euylypha, yet the fact of their being developed throughout the 

 greater part of the sarcode which lines the cell of Euglena, and 

 the same in Astasia, which is closely allied to Amceba, while in 

 the latter they appear also to be developed from the sarcode 

 generally, seems to indicate that they are developments of some 

 part or parts of the sarcode — perhaps of some of the moleculse. 

 That the two developments, viz. that of the ovules and sperma- 

 tozoid granules, present themselves together in Euglypha, has 

 already been stated, and the fact of the ovules in Euglena first 

 becoming developed outside the capsule of the nucleus, and the 

 granular development of this body following it, shows that the 

 ovules are not developed from the nucleus. The capsule, there- 

 fore, in Euglypha, under these circumstances, as well as when 

 there are ovules alone present, is often seen minus the nucleus ; 

 and the same in Amoeba Gleichenii, where it may be observed 

 rolling about with the ovules when the latter have, for the most 

 part, reached their largest size (fig. 5). In these instances, too, 

 the granules of the nucleus, if the latter has undergone this 

 transformation, may be dispersed among the general mass, as 

 the nucleus on such occasions has, if not absent, appeared faintly 

 marked, probably from having become effete or atrophied, — the 

 ovules and spermatozoids "appearing to be inversely developed ; 

 and in Astasia and Euglena, the former to be destroyed on the 

 development of the latter. 



Nicolet has stated that in Actinophrys the generative organs 

 consist of a central spherical membrane, enclosing little globules, 

 which are the rudiments of " eggs,'' surrounded by a " gela- 

 tinous granular layer,^' the granules of which appear to be the 

 reproductive organs*. But this simple statement, though bear- 

 ing the semblance of fact, is too meagre, without illustrations, to 

 be of any use. If his " spherical membrane " be the same as 

 our capsule of the nucleus, after the latter has become globular, 

 then certainly the ovules are not contained in it in Euglypha. 

 Stein also figures the nucleus of his Actinophrys oculata in 

 accordance with Nicolet's observations, viz. with a granulated 



* Comptes Rendus, vol. xvi. p. 115, 1848. 



