Till L0B1TES. 
11 
base, and reaches the very top, but is no where known to trans¬ 
gress these limits. 
Locality. —Chorhoti. (Nos. 1678, 1741, 1754.) 
ANNELIDA. 
TENTACULITES.-Sp. 
Plate 1, fig. 27. 
This species is really so like many others from various parts 
of the world, that it is scarcely worth while to give it a name. 
It has the rings, which are tolerably regular, quite faint in 
some parts of the younger shell, in others stronger, and with 
a few obscure annular strice. The adult portion has regular 
strong rings like those of T. anglicus. The form is slowly 
tapering, the tip curved, and the rings a little oblique; but 
this character is not so marked as in the T. supremus , brought 
by D. Forbes from the summit of the Andes. If, when we 
know more of Indian Silurian fossils, the species should prove 
distinct, it might be named T. inclicus , I think it is better, 
in doubtful cases, not to give specific names, but to be content 
with indicating the genera. 
Locality. —Damchcn. Chorhoti. (Nos. 1678, 1737.) 
2. SERPULITES.-Sp. 
Plate 1, fig. 28. 
This certainly was the tube of an annelide allied to the 
forms usually called Serpuliles , and not merely the cast of a 
filled-up burrow, such as are common in all muddy sediments. 
Narrow compressed tubes of this kind are frequent in our own 
Silurian and other Palseozoic rocks, and I do not know that 
they have received a separate name, to distinguish them from 
