va 
Bibliography. 453 
* 
Hydra tuba (p. 114); and subsequently; and as it were*by. accident, 
h ydra_ was i ) 
| with the Strodila of Sars! The discov 
ee, Ik any ‘passages we have mar 
previously observing that the Hydra tuba in its strobila form is some 
thing like a fir-cone or a cylinder cut into several whorls, each whorl, 
i i me a bifid 
ten to twenty, when the basis, as already stated, r 
habits of the hydra. es 
“First, a smooth fleshy bulb sustained a cylinder of 
“oh mae 
waving curvatures. row of twenty or twenty-four | rown- 
ed the summit of the cylinder, which row disappeared 01 blitera 
ted as the waving in its vicinity deepened, and the diat of the cyl 
hak ob. 
inder there expanded, that is towards the summit. Concomitar 
literation of the terminal row, a new circle of tentacula, at fi \ 
but gradually augmenting, was emerging from aroun ulb, while 
struggles of Medusz, into which the waving strata were evolving, 
ished their liberation to swim unconstrained in the surrounding 
element.” (p. 121.) ‘~ : 
Be 
asl 
