GASTEROPODA. 77 
PLEUROTOMARIA SCALARIS, Des/. Plate X, fig. 14. 
PLEUROTOMARIA SCALARIS, Deslongchamps. 1848. Mém. Soc. Linn. de Normandie, 
vol. viii, p. 67, pl. 8, fig. 1. 
Var. a, TURGIDULA, Des!., ibid., p. 67. 
— SCALARIS, D’Orb. 1850. Prod. Paléont., p. 269. 
P. Testa crassa, trochiformi; spird plus minusve exsertad; apice acuto; anfractibus cari- 
natis, subgradatis aut gradatis, tranverse striatis, sinu magno profundo; fascid sinis 
prominente, levi aut longitrorsum densissimé striatd, in medio anfractuum sitd; ultimo 
anfractu ad basim angulato, obtusiusculo; basi pland aut subconvead; umbilico aut 
parvo, aut minimo, aut nullo; apertura subquadratd, labro sinistro crassiori reflexo. 
(Deslongchamps.) 
Shell thick, trochiform; spire more or less elevated; apex acute; whorls carinated, 
more or less step-like, transversely striated; sinus large and deep; band of the sinus 
prominent, smooth, or very finely striated longitudinally, and placed in the middle of the 
whorl; the last whorl is angulated, or somewhat obtuse at the lower margin; the base 
is flat, or slightly convex ; the umbilicus small, very minute, or wanting altogether; the 
aperture subquadrate, the left lip being thick and turned outwards. 
Altogether we have obtained eight or nine specimens. ‘They vary in the elevation of 
the spire, and agree with the first variety of P. scalaris of M. Deslongchamps, viz. the 
turgidula which he thus characterises : 
“Testa conicd, anfractibus subrotundato angulatis, vie gradatis, transversim obsoletissime 
striatis, striis in ultimo basis vicinis; basi subconverd, striis radiatis incrementi tantum 
notatd, umbilico minimo.” 
Axis 29 lines, basal diameter 26 lines. 
Locality. The planking of Minchinhampton Common has furnished all our specimens, 
only three of which are well preserved. Inferior Oolite, Bayeux. (Des/.) 
PLEvROTOMARIA Pacopts. Plate X, fig. 9. Var. DEpaupErata. 
? PLEUROTOMARIA PAGODUS, Deslongchamps. 1848. Mém. Soc. Linn. de Normandie. 
vol. viii, pl. 14, fig. 4. 
-- — D’ Orb. 1850. Prod. Paléont., p. 301. 
P. Testd trochiformi, subturritd; apice acutiori; anfractibus gradatis, infra fasciam 
constrictis, transversim et tenuissime striatis, in medio nodis coronatis ad suturam subundu- 
latis; sinu magno, profundo; fascid sinis pland, densissimé longitrorsim striatd, infra 
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