70 PROFESSOR O. BUTSCHLI. 



more noteworthy, as this peculiar condition of the flagellate 

 cells has never been found in other organisms. 



Codosiga, Clark {' Ann. and Mag. Nat. Hist.,' 4th ser., 

 vol. i,p. 191). 



Antoplnjsis, Bory (' Encycl. Method. Hist. Nat. des 

 Zoophytes,' 1824). 



Epistylis, Ehrb. {' Die Infusionsthiere als vollkommene 

 organisnien,' Leipzig, 1838). 



1 Pycnohryon, Fromentel ('Etudes sur les Microzoaires,' 

 Paris, pp. 212 and 337). 



TJvella, Fromentel, op. cit., p. 338. 



Small, colourless, colony-forming Flagellata. The single 

 individuals have a long flagellum anteriorly, arising within 

 a very large collar. The organisms are naked, devoid 

 of a covering. Food is ingested into a food vacuole situated 

 outside the collar at its base. A contractile vacuole and 

 nucleus are present. The colonies are formed as they are 

 in Antophysa, the individuals arising from the end of a 

 straight and unbranched main stem, which is frequently of 

 considerable length. Reproduction by longitudinal fission 

 of the individuals forming the colony has been observed. 



Codosiga botrytis, Ehrb. 



Antophysis solitaria, Bory {' Encyc. meth.,' p. 67). 



„ „ (Bory), Fresenius ("Beitrage zur 



Kenntniss kleinster organismen," ' Abhandl. der Senkenberg 

 Gesellsh. zu Frankfurt-a-M.,' Bd. ii, p. ^SS, pi. x, fig. 

 29, 30). 



Epistylis botrytis, Ehrb (p. 284, pi. xxvii, fig. 4). 



Codosiga pulcherrima, Clark (loc. cit., p. 139, pi. v, 

 figs. 7— 27). 



? Uvella disjimcta, Fromentel (p. 338, pi. xxv, fig. 8). 



? Pycnohryon socialis, Fromentel (p. 137, pi. xxvi, fig. 9). 



These very interesting, but yet common, forms (PI. vi, fig. 7) 

 were discovered in 1858 by G. Fresenius, who with reason 

 held that they were the same as the Epistylis botrytis 

 of Ehrenberg ; whether, on the contrary, Antophysa soli- 

 taria of Bory de Vincent, after which Fresenius named 

 the species, is identical with the Epistylis botrytis of Ehren- 

 berg is doubtful. The number of organisms going to make 

 up a colony was long a matter of dispute ; usually only four 

 or five are seen, whilst Clark has observed eight, and Ehren- 

 berg ten. Solitary individuals are frequently mounted upon 

 short slender stalks. The pedicels of older colonies, richer 



