Flosciih/ria.] infusorial aximalcules. G23 



proboscis, which has apparently an opening at its end. Dujardin 

 thinks this proboscis may be notliing more than one of the ciliated 

 lobes advanced towards the centre. Body ovate ; has along sty- 

 liform contractile foot-like tail attached to the base of its case ; 

 when extended, the body and part of this foot are protruded. 

 Found upon tlie leaves of Ilottonia palustris. Length, when 

 extended, l-18th; case l-3Gth. 



Floscularia ornata {Cercaria, M.) — Case hyaline, rotatory organ 

 five or six-lobed, no proboscis. It is sluggish and unfolds itself slowly, 

 but often contracts quickly within its case. The end of each lobe of 

 the rotatory organ is thickened, and has from five to eight very long 

 cilia generally stretched stiffly out. They are very fond of Chlami- 

 domonas, and in swallowing large bodies, as Naviculce, contract the 

 whole body. Ehrenberg has numbered as many as five ova in the 

 case at one time : some were generally quite developed, showing the 

 movement of the young, with the two red eyes. Under a moderate 

 pressure the shell burst, and the young animalcule crawled out, 

 slightly vibi'ating ; the ciha were short and not very distinct, but 

 the oesophageal head was in action. AYhen old the foot-tail is 

 truncated. Found upon CeratophyUiun. Size of body l-108th. 



Dr. Dobie writes ('Annals of Nat. Hist.,' October, 1849,) 

 " Ehrenberg regards the Floscularia, described and figured by 

 M. Peltier, as identical with his F. ornata. Both Dujardin and 

 Peltier found the rotatory organ five-lobed in the species observed 

 in France, so w6 must either hold with Pritchard, that F. ornata 

 has sometimes five, at others six lobes, or consider the five-lobed 

 species a variety of F. ornata. . . . My friend Mr. Hallett 

 writes me that he finds F. ornata with a sixlobed rotatory organ 

 and no process." 



The two next species and accompanying remarks are taken 

 from a paper by Dr. W. M. Dobie, ('Annals of Nat. Hist.,' October, 

 1849.) 



F. campanulata. — Case diaphanous, rotatory organ with five 

 flattened lobes, fringed with very long cilia ; body ovate, without 

 proboscis ; tail long and terminating abruptly in a transparent 

 filament, spread out in a kind of sucker at the point of attachment. 

 Length l-50th when extended. Egg with two red eye spots, con- 



