Dr. Marr & M iss Gardner—Pleistocene Beds, Barnwell. 339 
early stages slightly oval, but in the later stages often truly elliptical, 
and ranging in length from °35 to °5 mm. 
Owcia very abundant, borne upon a scanty front wall provided by 
the succeeding zoecium at the expense of a broadening and flattening 
of the lower end of its area, which emphasizes, if it is not indeed the 
sole cause of, the oval shape; they are globular with a definitely 
concave free edge, but in the later stages the ground-plan tends to 
become narrowly heel-shaped. 
Avicularia vicarious, of hour-glass type, but much elongated and 
in the lower part rather expanded and inflated; the remains of the 
crossbar occur about one-third of the way up the aperture, and 
apparently spring. from the infolded walls at the lower point where 
they reach the aperture at which they cause a slight constriction of 
its “apparent outline; there is a faint tendency “to a similar con- 
striction at the corresponding upper point. 
This species occurs sparingly in the (restricted) zone of A. guadratus 
in Hants. It seems rather isolated. 
MermBRANIPORA FLORA, sp. nov. (Pl. XIV, Figs. 8, 9.) 
Zoartum unilaminate, adherent. 
Zoecia rather small, with thick areal margins rising out of acommon 
crust ; areas broadly to narrowly elliptical, average length °35 to 
-4:mm., breadth -18 to ‘28 mm.; the areal margins bear three or four 
pairs of perforated tubercles. 
Oecia globular, with fairly wide aperture and deeply concave 
free edge. 
Avicularia abundant, interstitial, small sig eirliee with calcareous 
crossbar, a good deal tilted up on the lower end. 
ane bits species occurs sparingly in the zone of IL. cor-testudinarium at 
Seaford. The tilted-up avicularia are somewhat suggestive of affinity 
with the group of which JL. cuculligera, Bryd.,' is a typical member. 
EXPLANATION OF PLATE XIV. 
(All figures x 12 diams.) 
E> | 
H 
CAAP ww H, 
Membranipora fascelis. Zone of M. cor-anguinum. Gravesend. 
M. faustina. Zone of M. cor-testudinarwm. Basing, Hants. 
M. feronia. Zone of A. quadratus (restricted). Shawford, Hants. 
M. flacilla. Zone of B. mucronata. Weybourne. 
M. flammia. Zone of A. quadratus (restricted).. Shawford, Hants. 
M. flora. Zone of M. cor-testudinarwwm. Seaford. 
(Zo be continued.) 
= 
@ Od 
~ 
Il.—On some Deposits conrarniné aw Arctic Flora In THE PLEISTO- 
cENE Beps oF BarnweEtt, CamMsBripGE. 
By J. HE. Marr, Se.D., F.R.S., and Miss E. W. GARDNER, Harkness Scholar, 
Newnham College, Cambridge. 
NE of us has been engaged for some years in the aids of the 
Pleistocene gravels and associated deposits of the Cambridge. 
district, and eventually proposes to give a full account of the results 
obtained. Meanwhile, considering the importance of noting the 
- 1 Gmon. MaG., 1914, p. 481, Pl. XXXV, Figs. 1, 2. 
