CLAVATE ASCIDIA. 
I 
Generic Character. 
Body fixed, approaching more or lefs to a cylin- 
dric fhape; in home fpecies feffile; in others 
iupported on a pedicle. 
Apertures (in moll fpecies) two: fituated towards 
the upper part; one lower than the other. 
Specific Character. 
LONG-STALKED ASCIDIA, with elongated 
oval body and two lateral apertures. 
The Afcidice in general adhere by their bafe to 
rocks, ftoncs, and other fubmarine fubftances. 
They are moftly of an oblong form, fomewhat thick¬ 
er at the upper part than at the lower. There are 
however two or three fpecies which are furnifhed 
with a long ftalk, or tubular Hem, which gives them 
an appearance widely different from the reft of their 
congeners. Of thefe anomalous Ipecics the animal 
here reprefented is the moft remarkable. 1 he body 
is of an elongated oval fhape, and of a fomewhat 
roughened furface : this appearance is alfo in fome 
fpecimens flill increafed by various fpecies of fer- 
