able variety in the form and length 
appendages are numerous, regular, 
short, and relatively thick: in an 4 
_ J. B. Reade (Lign. 79) they are long 
SS ee a ee 
ie 
SPINIFERITES. 241 
with spinous processes, which in most species are fimbriated 
at the extremities. There is consider- 
of the spines. In S. Reginaldi, these 
elegant species discovered by the Rev. 
and palmated: in other kinds they 
are of intermediate size and propor- Lien. 78. 
tions.* SPINIFERITES REGINALDI, 
The apparently torn and collapsed (4/agnified 500 diameters.) 
state of the body and arms of some examples first led me 
to doubt the siliceous nature of the original substance ; and 
on my discovery of the soft 
parts of foraminifera in flint 
and chalk, Mr. Deane under- Fai 
took to search for the so-called =— \Faw 
Xanthidia in chalk, that these | 
bodies might be subjected to 
chemical analysis.t Mr. Deane 
‘succeeded in detecting all the 
usual species in the Dover |__ 
chalk, by digesting some chalk |~ 
in dilute hydrochloric acid, \ 
and mounting the residue in 
Canada balsam. In this state heey ab) 
the shape of the body is that SpryirERITEs PALMATUS; IN FLINT. 
of a depressed sphere ; many (755 S00 aianegectere:) 
of the specimens appear to have a circular opening, and the 
* Excellent figures of several species are given in a Memoir by 
H. H. White, Esq. of Clapham, in the Trans. Microscopical Society, 
vol, i. p. 77. 
+ A torn and apparently shrunken specimen from chalk, is repre- 
sented in my paper on Foraminifera; Philos. Trans. 1846, p. 465. 
VOL. I. R 
