236 
THE GEOLOGIST. 
were related to Williamson's JPatellina on one hand, and to D'Orbiguy's 
Orhitolina on the other. These varieties we described very briefly in the 
' Annals of Natural History ' for July, 1860 (3rd series, vol. vi.), and we 
traced a strong line of natural connection between some twelve more or 
less distinct varieties of what we termed Orhitolina concava, Lamarck, sp. 
Since then, we have again worked at this subject, with Dr. Carpenter ; 
and, having somewhat modified our opinion as to the closeness of the pre- 
sumed relationship of Patellina and Orhitolina {Tinoporus, Carpenter), 
we do not regard the Patelline as belonging to the same species as the 
Orbitoline forms — making two species instead of one. But we still are 
fully convinced that, however spongioid it may appear, the Orhitolina glo- 
hularis is a foraminifer, and a variety of O. concava, Lamarck, sp. The spe- 
cimens usually found in the chalk and other cretaceous beds are largo 
individuals of this very protean species, the typical form of which is con- 
cavo-convex, or cupuliform ; whilst other varieties have flat, plano-convex, 
or even biconvex and globular shapes. The concavity of the typical variety 
becomes, in many of the globular forms, a small cavity, a hole, or even a 
neat cylindrical perforation. The last feature may be due, perhaps, to the 
Orhitoliiia having grown around a smooth stem of seaweed. At all events, 
such perforated specimens are natural, and as abundant in the chalk as 
those of different conformations. 
In the ' Annals of Natural History ' above referred to, after describing 
those Orhitolince to which De Montfort's Tiiioporus haculatus is referable, 
we go on to a largish sugar-loaf form from the Upper Chalk of Ciply, Bel- 
gium, and to a smaller and globular variety in the same deposit, thus : — 
" In tlie same deposit are somewhat smaller and globular specimens, in 
which the granular growtli of the septal edges is still greater ; so that con- 
tinuous, rough, sinuous walls of division are produced, marking out irre- 
gular polygonal spaces, including one or more cells, the faces of which lie 
low down below the surface. Essentially similar septal projections con- 
stitute the limbate feature in JRotalia Beccaria, var. Schrceteriana, and 
a. repanda, var. Carocolla. Similar globular Orhitolince (0. fflohularis, 
Phillips, sp.) are common in other cretaceous deposits. 
" Millepora? glohularis, Phillips (Geol. Yorksh., pi. 1. f. 12) and Wood- 
ward (Geol. Norfolk, pi, 4. f. 10-12), Tragos glohularis, Reuss (Bohm. 
Kreid., p. 78, pi. 20, f. 5), Coscinopora glohularis, D'Orb. (Prodrom., ii. 
p. 284), and Morris (Catal. Brit. Foss., 2'nd edit., p. 27), is our Orhitolina 
glohularis. Michelin's Ceriopora Avellana ( Icon. Zooph, p. 208. pi. 
52. f. 13), from Sarthe, appears to us to be a large specimen of the same 
variety. Its probably adherent habit and perforated condition are not 
inimical to this view. 
"In some of the figured specimens of O. glohularis, the not unusual 
hole in the base is indicated. Occasionally individuals are perforated by 
a more or less irregular tubular cavity. The roundness of the specimens, 
and their holes and tubular cavities, appear to have suggested to the old 
Fhnt-folk of the Valley of the Somrae, that they might be used for beads ; 
for such perforated Orhitolina^ are frequent in the gravel that yields the 
flint axes " (pp. 34, 35). 
I may add, that the imperforate OrhitolincB occur in the gravels, just as 
much as the perforate. Also that the perforation of the non-drifted speci- 
mens in the chalk is often just as smooth and straight as if artificial ; the 
interior surface is not worn, however, but consists of the natural structure 
of the organism. 
T. PupEKT Jones. 
April 22, 1S62. 
