90 T. C Milgard—Infusorial Cirewit of Generations. 
The larger of these coatless, granular yolks—(constituting the 
original pseudo-genus, and species “ Zooglaea Termo ” jar ard.” 
mostly consist of two parts, viz: a general “albumen” of a — 
granular and evidently trabecular texture, enclosing one or two 
distinctly coated, quite hyaline and perfectly globular vesiolel 
The latter resemble in $ ape a very clear white currant, as 
it were, by having a sharply defined sc pA inscribed near 
one side, that is caused by a local inversion of contents (some- 
what like the air-vesicle within a hen’s eg; 
These “currant ”-yolks enlarge in size “and soon at. the | 
(darkening) circlet, or rim of the introversion, reveal a rapid — 
rotation and “ciliary motion ; "and, still la ter, a contortion | 
and volubility of contents, really perplexing to the attentive 
beholder, who in vain attempts to determine its form, or at least 
to detect it in the moment of hatching, “ anxiously wasting 
whole nights and half days” veers as Hhrenberg has ex- 
— himself on a similar subject. At last the membrane 
ursts and extrudes a globe or halo of gelatine, containing 4 
crucible-shaped body, gently moving, which, when finally set 
free by the rupture of that gelatinous halo, at once elastically 
extruding the inverted part, takes a pune resembling a rice-palea 
or the fore-wing of a thunder-fly (Thrips) ; traveling broad- end 
foremost with great velocity, and steady as an arrow. er a 
while a somewhat ludicrous scene ensues, when the little ani- 
mal, b ees its feeomed skin or scabbard, is seen violently 
to disentangle its large jerking bristles hidden in the 
veins of the sheath, and its small body. It thus appears like a 
little dwarf, frantically floundering about in a Spanish cloak, 
spurs and sword too large for their owner. It now represents 
a very small Oxytricha with comparatively very long, stout, but 
as yet softish bristles 
This formed the more direct evolution, from the Oxytricha 
pellet, viz: out of its circular “‘ currant-vesicles.” Its envelop- 
ing ose mass of “trabeculated albumen,” however, keeps — 
still increasing to the pie ge of a loose snow-ball, as it were} _ 
and each single trabecular joint assumi 
§-form, and a jerking penne commotion, they at last tear 
loose singly, and escape each as a lanceolate, warped and finely- 
tailed “ Vibrio Termo Dujard.”+ In consequence of its twisted — 
* As represented by Cohn in “ Nov. Act. cas Curios.” 1854, Vol. I, Tab. XV; _ 
fig. rx. In se sana researches on Cholera, the term is rnd : 
engorged join ae pe corruptive fibrils (or, Oidium lactis ”) re’ with 
bacterial daushitorc 
: 
” (repuev, a boundary-pole or — probably reteriee d 
seipticaly. a father ws the robe Ma “ battering-rams,” extrude m diffuent “cur 
rant ”-vesicles (or ame@ba) of the paramecian cloud- senchicens, b as : talon hor : 
The albuminous Oxytricha-pellet is pretty well ‘represented in A. Pritchard’s “A 
History of Infusoria,” tab. xvi, fig. 69. The indistinct §-shaped ipeverensge 2 
; icles, ; i ; y shading w! 
, conveying a false impression of their shape and 
