Mr. H. J. Carter o« the Organization of Infusoria. 231 



thought that there was any reason for tliinking them organs of 

 imj)reguation. Lately, however, I have observed, that full half 

 the larger ovules of the seed-like body, under this condition, 

 have one of these granules in different degrees of eonnexion with 

 them, from simple ai)proximation to almost undistiuguishable 

 incorporation (tig. 39 a'-e) ; also that when the internal contents 

 granulate on the third or fourth day after they have been set 

 free, the prominence caused by the appended granule does not 

 disappear until the whole ovule has passed into a polymorphic 

 cell {/i, I) ; that is, that after this, no capsule or anything else re- 

 mains behind, to indicate that the granule and its capsule, with 

 this prominence, have not wholly become transformed into the 

 new sponge-cell. This granule, however, is not entirely confined 

 to the larger ovules, where it is for the most part affixed to the 

 margin, but is also presented here and there by many of the 

 small ones. In the larger ovules it bears, in size, the proportion 

 of about one to eight, and the largest ovules average about -jg^j^Q^h. 

 of an inch in diameter. About twelve hours after the ovules and 

 granules have been set free in the manner mentioned, into di- 

 stilled water, in a watch-glass, they, as well as the granules, ex- 

 hibit a great deal of motion, which lasts up to the end of the first 

 day, when they become quiet again ; and this motion, though 

 least in the largest ovules and most in the smallest granules, is 

 generally from one side to the other in all, like that of a zoosj)ore 

 which is attached to the glass by one of its cilia, or of a monad, 

 which possesses a polymorphic coat attached to some body, and 

 a moving single cilium. Some of the granules, however, every 

 now and then appear to break away from this attachment, and 

 then present a single (?) ciliary appendage, which ceases to be 

 visible again the moment they become fixed. All the ovules, 

 both those with which a granule is connected, and those without, 

 appear to undergo a like granulation of their internal contents, 

 and pass into new sponge-cells (i, k, I), which for a day or two 

 remain polymorphic and reptant, and then assume a spherical 

 actinophorous form ; while there is also a development of single (?) 

 ciliated monads, closely resembling those which are found in the 

 fully-developed sponge {m). In their reptant state, also, the 

 furmer present the vesicula and frequently a single cilium. 



Under what circumstances we arc to view the incorporation of 

 this granule with the sponge-ovule, I am ignorant*. Certain it 



* It is just possible that these granules may be buds like those which 

 appear on the so-called "ferment-cells" (fig. 4-l),but the latter i^row iutouew 

 cells as large as the old ones before they are detached, if even this takes 

 place then, which is not the case with the granule attached to the spouge- 

 ovulc. Again, the ferment-cells are chiefly seen in pairs, from the bud in 

 many having increased to nearly the size of the ])arent, while the s|5"ongc- 



