a 
i 28 ed 
~s. 
from the Island of Malta. 115 
tubercles ; it extends from the prominent point of the base to 
near the lower part of the anal opening. 
Scalaria Duciei, Wright, n. sp. Pl. VII. fig. 4a, b. 
Diagnosis.—Shell turriculated, imperforate ; spire gently taper- 
ing; whorls ten, with transverse prominent plates and longi- 
tudinal elevations. ‘The transverse plates, nmeteen in number 
on the body-whorl, are formed of numerous thin shelly lamine, 
closely united where they proceed from the whorl, but out- 
wardly they expand and form a rather irregular undulated sur- 
face ; each plate describes three curves; two of these, the 
anterior and posterior, are short, and the central one is long, 
forming an arch over the whorl; the posterior, at their junc- 
tion with the central curve, form angles, from whence blunt 
spiny processes proceed; these form a conspicuous ridge on 
the posterior upper part of the whorls; the junction of the 
anterior with the central curves forms a carina on the body- 
whorl, which commences at the posterior border of the aper- 
ture, and terminates at the anterior part thereof, at a di- 
stance from the umbilical ridge. The longitudinal elevations 
form a kind of cellular structure ; between the plates they are 
seven or eight in number, and on them and the intervening 
surface of the shell, delicate longitudinal lines are sculptured. 
The aperture is entire, and is round or inclining to an oblong. 
Dimensions.—Length 2,%, inches, diameter of the body-whorl 
3ths of an inch. 
Collected from the calcareous sandstone No. 4, at Malta. 
Lenticulites complanatus, Defrance. PI. VII. fig. 4a, 6. 
Genus Lenticuutites, Lamarck. (Subkingdom Radiata. 
Class Foraminifera. Order Hélicostégues,D’Orb. Family Nau- 
tiloide.)—Shell nautiloid, equilateral, spire rolled on the same 
plane, compressed, sublenticular, multilocular ; whorls apparent, 
opening narrow, triangular, prominent, against the penultimate 
turn of the spire. 
Diagnosis.—Shell oblong, lenticular, much compressed; septa 
convex, with longitudinal partitions, growth lines very appa- 
rent. Long diameter ;4ths of an inch. 
This beautiful Foraminiferous shell occurs in great abundance 
in No. 2, the yellow sand with blackish grains; in fact it forms 
large masses of rock in this bed. As it 1s constantly associated 
with the Echinoderms, we have added a drawing thereof. De- 
france noticed, but did not figure this fossil; he collected it at 
“ Anvers prés de Pontoise, 4 Dax, & Loignan prés de Bordeaux, 
5 
