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GHOLOGICAL MAGAZINE 
NEW SERIES. DECADE VI. VOL. At gonian instip 
No. VIII.—AUGUST, 1916. ES 
ORIGINAL ARTICLE 
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I.—NotkEs oN NEW OR IMPERFECTLY KNOWN CHALK oi Piea| Musee 
By R. M. Bryponez, F.G.S. oped 
(Continued from the June Number, p. 243.) 
PLATE XIV. 
MeMBRANIPORA FASCELIS, sp. nov. (Pl. XIV, Figs, 1, 2.) 
Zoarium unilaminate, adherent. 
Zoecia fairly large, with very little external front wall; areas 
widely elliptical, flattened for a short way at the upper end and 
surrounded by a slender rim, average length -5 mm., breadth -35 to 
-4mm. 
Oecia very constant in occurrence, semicircular in plan, borne on 
the very scanty front wall of the succeeding zoccium and often 
impinging slightly on its area. 
Avicularia very numerous, nearly always small and interstitial, but 
occasionally (Fig.2) large and vicarious or sub-vicarious, very unifor mly 
well preserved ; they are of hour-glass type, short and wide, and the 
ends of a crossbar occur about one-third of the way up the aperture; 
these ends are so sharp and uniform as to suggest that they are not 
the remains of a broken calcareous bar but the well-preserved supports 
of a membranous bar. 
This species occurs sparingly in the zone of UW. cor-anguinum in 
Hants and Kent; and I have a dwarfed specimen from the zone of 
Marsupites in Hants. It seems to form a lineal series with the 
three following. 
MeEMBRANIPORA FAUSTINA, sp. noy. (Pl. XIV, Fig. 3.) 
Zoarium unilaminate, adherent. 
4oecia large, shallow, and entirely devoid of front wall, which 
gives them a very primitive appearance, very variable in shape, and 
often developing a long narrow handle at the lower end which in 
a less primitive form would be a very probable mark of avicularia; 
*6 mm. would perhaps be a fair average length of area, apart from the 
handle-like extension which may add almost any length to the zoecia 
in which it occurs ; at the lower end there is very regularly developed 
a crescent-shaped to semicircular cavity in the floor which may be 
ocecial in nature. 
Oecra do not occur. 
Avicularia numerous, of the same general type as those of 
M. fascelis, but smaller and in proportion much narrower; they are 
DECADE VI.—VOL. III.—NO, VIII. : 22 
