CORALS. 
49 
Himalayan series, readily distinguishes it from the flatter fossil 
next described, which accompanies it. From the British 
species before mentioned, the want of a central mammilla will 
readily enough separate it. 
Locality. —(F) ; also Chorhoti Pass (growing on Orthis 
uncata). 
SPH. INOSCULANS. 
Plate 5, figs. 7, 8, 9. 
A flattened and slightly-convex rounded disk, about an inch 
and a quarter broad, and covered with small rhomboidal areolae 
—the longer diameter of which appears to be transverse to the 
length, if it may be so called, of the fossil. The arrangement 
is that of the Ischadites, which the fossil much resembles. 
But the areolae are not transversely and longitudinally ribbed 
as in that fossil. 
They are only simply convex, and the edges are greatly 
sinuated, inosculating with those of neighbouring mammillae 
in a way which would remind a botanist of the proteiform 
cells of some water plants. The common Callitriche verna of 
our ponds shows the structure alluded to remarkably well— 
in the transparent stipules at the base of its leaves. 
Locality .—Niti Pass. 
CRINOIDEA. 
Crinoid stems of several species occur, some an inch across, 
mostly round; some pentagonal with round canals, others 
round with quinquefid canals. None perfect enough to be 
worth description. No Cystidean fragments have been found, 
and this is somewhat remarkable. 
ZOOPHYTA. 
Corals, which appear to have been everywhere abundant, 
though of few species, in Lower Silurian rocks (but which are 
VOL. II. 
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