LITERATURE OF THE INFUSORIA 



425 



Family ACIXETINA, Biitschli. Hallezia, Sand. Animal attached by 

 a small protoplasmic knob. Numerous suckers at the anterior extremity. 

 Several endogenous gemmules formed at one time. '18. Freshwater. 

 Tokophrya, Biitschli. (Figs. 91, 92, 93.) Pedunculate, but with the 

 saucer-shaped terminal expansion absent or slightly developed. Suckers 

 fasciculate or dispersed. Endogenous gemmation. -25. Freshwater and 

 marine. Acineta, Ehrb. (Fig. 94.) Pedunculate, with well-marked 



FIG. 96. 



A single gemmula of a species 

 of Ephelota, showing on the right 

 a small disc of cilia mounted on 

 the end of a long stalk. (After 

 Ishikawa.) 



FIG. 97. 



Ephelota (Hemiophrya) 

 gemmipara, Hertwig. Ex- 

 ample with six gemtnulae 

 in process of formation, 

 into each of which a 

 branch of the meganu- 

 cleus (a, a) is extended. 

 (After Hertwig.) x 400. 



terminal expansion of the peduncle. -3. Marine and freshwater. Soleno- 

 phrya, Clap, and L. With terminal expansion of the peduncle globular in 

 form. 



Family EPHELOTINA, Sand. Ephelota, Wright. Tentacles and 

 suckers on the anterior surface. Reproduction by multiple exogenous 

 gemmulae (Figs. 21, 34, 97). No terminal expansion of the peduncle. 

 25. Marine. Podocyathus, Kent. Small conical expansion at the 

 summit of the peduncle. Reproduction by one or two small tentaculate 

 gemmulae. -05. On marine Bryozoa and on Campanularia. 



LITERATURE OF THE INFUSORIA (HETEROKARTOTA). 



A very complete summary of the literature, and of our knowledge of the 

 Infusoria (Heterokaryota) up to the year 1887, will be found in 



Biitschli, 0. Infusoria. Bronn's Klassen und Ordnungen des Thierreichs, 1889. 



The following memoirs have appeared since the publication of Biitschli's work, 

 and will be found of use to students wishing to obtain further information about 

 the group : 



Calkins, Cf. F. Studies on the Life-history of the Protozoa. Part I. Arch. 



fur Entwickelungsmechanik, xv. Part II. Arch, fur Protistenkunde, i. 



Part III. Biol. Bulletin, iii. 

 Le Dantec, F. La regeneration du micronucle'us chez quelques Infusoires cilis. 



Compt. Rend. 125. 

 Doflein, F. Studien zur Naturgeschichte der Protozoen I. Kentrochona nebaliae; 



II. Kentrochonopsis multipara. Zool. Jahrb. 10. 



