54 J. 8S. Gardner—Cretaceous Gasteropoda, 
Although approaching somewhat closely to known Neocomian forms 
and to Blackdown forms, they appear to be distinct from them, and, 
so far as I can judge, new. Prof. W. Keeping is, however, engaged 
upon the Mollusca of Upware; and we have every reason to hope 
that the results of his studies will be shortly published, and that 
they will embrace descriptions of the shells here alluded to. Still, I 
cannot refrain from briefly noticing a very rare Scalaria, of which I 
believe no other specimen is known, and venturing to christen it in 
his honour. Another shell which particularly struck me was the 
internal cast of a rather large Calyptraa-like limpet, belonging to 
the Woodwardian Museum, which has spiral sutures, and in this 
respect is unique from British Cretaceous rocks. 
Scarip#.—Scalaria Keepingi, Gard., Plate III. Fig. 7. 
Whorls inflated, about twice as wide as high; ribs 9 to each 
whorl, rounded, coarse, very irregular, flexuous; striz very fine and 
barely perceptible under a glass; suture not visible. 
This species, whilst resembling Neocomian forms, in other re- 
spects differs from them all both in the nearly complete absence of 
strize and also by its concealed sutures. 
The only fragment known is from Upware, and in the possession 
of Mr. Walker. It consists of nearly three whorls, and measures 
19 mm. 
I am also able to add a very beautiful species to the Gault list 
from Folkestone which differs only from S. Dupiniana in the form of 
its rib-like ornaments, which are sharper, more delicate, and more 
numerous, numbering 18 instead of 12; its more acute angle, 20°, 
and generally more delicate form, resembling in these respects one 
of the Blackdown species. A specimen of S. Clementina, Mich., has 
come to light, showing that this shell attained even greater dimensions 
than was supposed; measuring 11 cent. I have also received a 
new spiral Gasteropodous shell from Blackdown, which cannot be 
placed in any existing genus. 
Disoketa,) gen. nov. 
Shell turreted, whorls angulated, with two channels or grooves 
bordered by slightly elevated keels. 
Disoketa Meyeri, sp. nov., Pl. III. Fig. 5. 
Shell turriculated, in an angle of 20°; length 8 mm.; whorls 7 or 8, 
angulated except at the apex, the ridge or most salient point of each 
being considerably anterior to its centre, each ridge possessing a 
deep channel or groove sunk between two keels. A similar channel: 
appears at the suture, and is disclosed on the last whorl as a second 
channeled keel. The flat parts of the whorls are undulated by wave- 
like ribs (at opposite angle to the spiral), which also influence the 
keels. The apical whorl is globose and ribbed; the body-whorl is 
somewhat produced on the right side. 
This is perhaps one of the most unusual forms among Cretaceous 
shells. Such channels are only met with in a very few genera, and 
no equally turreted shell possesses them, except the Paleozoic genus ~ 
? dis, twice, oxeros, channeled. 
