Atcellina.'] INFrSORTAT. ANIMALCrLHS. - 213^ 



had been abundantlj' generated ; and, after their discovery, ArcdJa 

 hyalina. The creatures were inactive, although, with attentive ob- 

 serv^ation, they might be seen to change their phiees." Ehrenberg 

 only once perceived the locomotive organ of the animalcule, situated 

 tmder one corner, upon which it appeared to rest, and that so firmly, 

 that six out of the eight protuberances of the die-like loriea were 

 visible at the same time. Figs. 95, 96, and 97, represent these 

 creatures in different positions. In the second, the gelatinous 

 variable process is seen projecting from beneath the loriea ; in the 

 other two figures, the loriea only is \'isible. Fig. 98 is a young- 

 specimen. Size 1 -570th to l-430th. 



The first four of the ensuing appended genera are from Dujardin, 

 the others from Schlumbergcr. (An. des Sciences, Zoologie, 1845.) 



Genus Tkinema. — Shell membranous, but resistant, diaphanous, 

 ovoid elongated, narrower in front, with a large oblique orifice 

 placed laterally ; expansions filiform, as long as the shell, very thin, 

 and but two or three in number, entirely retracted when expansions 

 are to be pushed out from another side, and moving the animal 

 onward by their contraction. 



T. acinus. = Bifflugia Enchelys. (Ehr.) 



Genus Euglypha. — Shell diaphanous, membranous, resistant, of 

 an elongated ovoid form, roimded at one end, terminated at the 

 other by a very large truncated orifice, with a dentated margin ; its 

 surface marked by eminences or depressions, in regular oblique series ; 

 expansions filiform, numerous, simple. 



E. tulerculata. — Loriea striated with rounded tubercles. The ter- 

 mination of its expansions are extremely delicate. Length 1 -295th. 

 Found in stagnant ponds. 



E. alveolata. — Loriea with regular polygonal depressions in regular 

 oblique (spiral) series. Length 1 -290th. 



Genus Gkomia. — Loriea smooth, yellowish brown, membranous 

 soft, globular, with a small round opening, from which the very long 

 branching expansions proceed, tapering to very fine extremities. 

 Found in both salt and fresh water. 



G. oviformis. — Globular, smooth, aperture surrounded by a short 



