221' Mr. H. J. Carter on the Organizntion uf Infusoria. 



becomes more inarginated or distinct, and assumes a nucleolar 

 form. In Sj)oiif/i//<i there is also a delicate, pellicular layer, which 

 is endowed with a low power of movement (iifjs. '6[) h, 40«). 



I first noticed these ovules in the seed-like bodies of Sj)umji//a, 

 where they are enclosed m transparent globular sacs*, each sac 

 holding a greater or less uundjcr of ovules, which arc discoid in 

 form, of ditFerent sizes, and accomjianied by a great number of 

 active molecular granules (figs. 37, 3<S); and during the past year 

 1 have frequently seen such in Amaba Gleicheuii, where they have 

 been equiilly nunu'rous, have borne the same characters, and have 

 been accompanied by a number of active molecular granules, as 

 in the transparent globular cells of the capsules of ^)vo/////Y/«(fig.5.) 

 They occur also in Eugbjjiha alceulata\, cougregated round the 

 hyaline capsule of the nucleus, from four to fifty in number, and 

 mostly of the same size, but always globular, and accompanied 

 also, as in Sjionyilla, by molecular granules (fig. 20). Such 

 ovules may also be seen similarly situated in J)ijjliu<jiu tricuspis 

 (H. J. C) and in Arcellina dentata (Ehr.) ; enclosed in the latter 

 in an ovoid capsule, which nearly fills the test. In Adinoplirys, 

 also, they appear to have been seen by M. Nicolet, as will be 

 mentioned hereafter. 



Astasia and Euylena constantly become filled with discoid 

 cells of a similar kind, but in those of the former I have seldom 

 been able to distinguish the capsule from the internal contents, 

 on account of their smallness and the incessant motion of the 

 animalcule (fig. 40). In Euglcna, however, they are very evident, 

 and it is worthy of remark that each partakes of the form of 

 the Euglena to which it belongs (figs. 50, 58). Thus in E. acus it 

 is long and cylindrical ; in E. viridis oblong, compressed (fig. 59) j 

 in Cruinenula texta and Phacus circular, compressed, &c. 



In Spungilla and AmaOa these ovules follow the motions of 

 the sarcode, in which they appear to be loosely imbedded ; they 

 also undergo j)artial transposition in Astasia and Eaglcna, but 

 in Euylijplia and Dijjiuyia are chiefiy located round the globular 

 hyaline capsule of the nucleus, at the posterior part of the 

 body (fig. 28), — a position which it is well to remcndier; for 

 although apparently unconnected in all, with the nucleus and 

 its capsule, and diffused generally throughout the sarcode in 

 Sporigilla, Anicfha, Astasia, and Kwjlenu, yet in Eugli/j)lia and 

 JJiJfiugia, which we shall hereafter find the best for typical 



* Ann. and Mag. Nat. Hist. vol. iv. p. 8/, 1849. Of the formation of 

 the seed-like body, I need not say more here, than that it consists of a 

 capsuled aggrejration of ovule-bearing sponge-cells; while -^mceia presents 

 the same appearanee, when pregnant with ovules, as one of these cells, and 

 becomes capsuled sinjriy. 



t Dujanlin, Hist. Nat. des Zoophytes, Atlas, tab. 2. fig. D. 



