. Be * GELATINOSI. 393 
CrisTATELLA, Cuv. 
Where there is a double range of numerous tentacula on the 
mouth, curved into a half moon, forming a plume of that figure, 
which attracts the nutritious molecules by their regular motion. 
These mouths are placed on short necks attached to a common ge- 
latinous body which progresses in the manner of a Hydra. These 
animals are found in stagnant waters in France. To the naked eye 
they seem to be small spots of mould(1). 
'+ VORTICELUA. 
Where the stem is fixed, frequently ramous and much diyided, 
each branch terminating by a body shaped like a bell or horn.. From 
the aperture project two opposing groups of filaments which are con- 
stantly in motion, and that attract nutritious molecules. The species 
are very numerous in fresh water, and are generally too small to be 
perceived without a microscope. They form bushes, arbuscles, 
plumes, &c. &c.(2) 
PEDICELLARIA, 
The Pedicellarie are found between the spines of the Echini, and are 
considered by various authors as organs of these animals; most pro- 
bably however they are Polypi, which there seek an asylum. They 
consist of a long slender stem, which terminates by a horn, furnish- 
ed at its extremity with tentacula, sometimes filiform and sometimes 
foliaceous(3). 
(1) Cristatella mucedo, Cuv.; Rees., IIT, xci. 
(2) The only species I refer to this genus are those figured in the Encyc., 
pl. XXIV and XXVI. They are closely united by strong affinities with certain 
species placed among the microscopical animals. 
(3) Mill., Zool. Dan., XVI, copied Encyc., LXVI. 
Vou. IV.—2 Z 
