22G Mr. H.J. Carter o/j the Organisation of Infusoria. 



thus separate from each other ; meanwhile tlic oritrinal capsule 

 of the nucleus for the most part disappears (tiers. 10-15). In 

 this way, some individuals out of a group of Aimeba radiosa, 

 hearinir such granules, were seen moving about, even when so 

 reduced that hardly anything but their cell-wall, and the one or 

 two spherical segments of the granulated nucleus that remained 

 in its interior, were left; upon beiug delivered of which it may 

 be presumed that they became effete or died (fig. 11). Some- 

 times these segments are evidently held together by a soft 

 mucous cell, which, being polymorphic, assumes the form of 

 Actinophrys, and thus exhibits a locomotive power (fig. IG) ; 

 while at others the cell becomes firm, transpai'cnt, and spherical, 

 and the granules do not leave it until they become endowed with 

 locomotion (fig. 15). When the latter is the case, the sperma- 

 tozoids may be seen, if fully developed, to be bounding about 

 their respective capsules, while the capsules themselves arc still 

 rolled on in the sarcode of the Amoeba xinder progression. At 

 other times the whole mass of spermatozoids, all separated, 

 and having left their capsules, may be seen to fill the body of 

 the Amoeba, whilst still under active polymorphism and loco- 

 motion. Lastly, the parent sometimes dies in this state, and 

 then the mass of spermatozoids may be seen to undergo gradual 

 disintegration, as the granules, by twos and threes, or more, dis- 

 entangle themselves from the sarcode, and bound off into their 

 new element. These gi'anules or spermatozoids in Evgh/pha 

 average about jt^^oo ^^ T^Uoo °^ ^^ va.c\\ in diameter; about 

 four of them would make the diameter of the largest ovules, 

 which arc, again, somewhat less than human blood-globules. 



In Evyhjpha aheolata a similar development takes place round 

 the anterior part of the capsule of the nucleus (fig. 29) ; but 

 from the concealed position of the latter, I have not been able 

 to see it distinctly originate in the nucleus, as in Amoeba. The 

 segments here have always been compressed, probably from the 

 soft polymorphic state of the mucous cell which encloses them 

 admitting of their assuming a plane or reptant actinophorous 

 form (fig. 31) ; aud in this way they are carried out of the Eu- 

 gl'jpha, which, like Amoeba, perishing on their development, and 

 passing into decomposition, thus allows them to quit the parent 

 cavity ; at other times they separate close to the hyaline capsule 

 of the nucleus, and finally swarm about in the test generally 

 (fig. 29). Although this development, as well as that of the 

 ovules, takes place more profusely in different individuals than in 

 the same one, yet it is by no means uncommon to see, in a group 

 of ovule-bearing Euylyplue alveoluta, individuals with both deve- 

 lopments in them at once (fig. 30) ; and with no gradation in 

 the size of the ovules to indicate that they originated in the 



