308 Mr. H. J. Carter on 
the free ends of the fibre forming ccenosarcal cancellated struc- 
ture between the apertures of the tubular spaces (? Lunulites 
urceolata, Phillips, l. ¢c., fig. 11). This form also occurs 
with a conical upper surface, when it somewhat resembles 
that species of Foraminifera called Orbitolina lenticularis, 
but differs from it in the concentric annulation of the ex- 
terior being on the convex instead of on the concave side, 
to say nothing of the internal structure, as may be seen by my 
elucidation of this fossil (‘ Annals,’ 1861, vol. vii. pl. xvii. 
figs. 5-9). 
Lastly, there is another subglobular free form, with one or 
more conical elevations on its upper surface, from which 
grooves radiate downwards, and, branching as they descend 
over the globular part of the fossil to its base, become shal- 
lower, and finally disappear before reaching the centre. This 
appears to be only a free form of Millepora Woodwardit. — 
In all these fossils we may observe that the remarkable form 
of cancellated structure which I have described in Millepora 
alcicornis, is excavated by tubular spaces that radiate from the 
centre to the circumference, where the same structure projects 
in little points above the surface around their apertures, iden- 
tically as the horny structure of the same kind projects above 
the apertures of the polypites in the polypary of Hydractinia 
echinata. ‘This structure is the same in all the branched 
species of Hydractinia, whether living or fossil, chitinous or 
calcareous; andit is perhaps nowhere seen more beautifully than 
in the branched Chitina ericopsis, where there is no cuticle 
and no core to the stems, which thus entirely and exclusively 
consist of this peculiar cancellated tissue excavated by tubular 
spaces. Such cancellated structure is never seen in any of 
the Foraminifera, not even in Polytrema, and only in a few 
stony corals; so that its presence, as before stated, appears to 
be decisive against the Hydractinie being Foraminifera. 
Having, on the 1st January last, received, with three other 
species of fossils allied to Hydractinia, from Dr. Steinmann of 
Munich, two specimens of Millepora globularis (Porosphera, 
Steinmann) from the Upper Chalk of Hanover, which he 
very properly identifies with Bradya tergestina, the old 
generic name of Phillips must take precedence of the latter ; 
and therefore I have called the Dover fossil “ Mcllepora 
Woodwardit ;” nor will it appear strange after this that Phillips 
should have applied the name of “ Millepora”’ to these little 
fossils (/. c.), subsequently changed by Etheridge to Cosci- 
nopora (ed. 1875). 
When, too, we remember that Millepora alcicornis is found 
under a ‘variety of forms,” one of which is stated by Ellis 
