from the hi and of Malta. \ \ ~> 



tubercles; it extends from the prominent point of the base to 

 near the lower part of the anal opening. 



Scalaria Duciei, Wright, n. sp. PI. VII. fig. 4 a, b. 



Diagnosis. Shell turriculated, imperforate ; spire gently taper- 

 ing; whorls ten, with transverse prominent plates and longi- 

 tudinal elevations. The transverse plates, nineteen in number 

 on the body-whorl, are formed of numerous thin shelly laminae, 

 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 2y^ inches, diameter of the body- whorl 

 j$ths of an inch. 



Collected from the calcareous sandstone No. 4, at Malta. 



Lenticulites complanatus, Defrance. PL VII. fig. 4 a, b. 



Genus LENTICULITES, Lamarck. (Subkingdom Radiata. 

 Class Foraminifera. Order Helicostegues, D'Orb. Family Nau- 

 tiloida.) 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 T 4 gths 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 is 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 pres de Pontoise, a Dax, a Loignan pres de Bordeaux, 



