34 MALACOZOA. CErHALOrODA. FORAMINIFERA. 



Several specimens found in shell sand from Cruden Bay, 

 sent to me by Mr. Alex. Mm-ray, in November, 1842. 



Nautilus crispus. Linn. Syst. Nat. i. 1162. — Nautilus spiralis 

 geniculis crenatis. Walker. Test. Min. Rar. PL 3. f. 65. — Nautilu^ 

 crispus. Mont. Test. Bnt. 187. PL 28. f. 5. — Nautilus crispus- 

 Flem. Brit.Anim. 228. — Polystomella crispa. Lamk. Syst. vii. 62o. 



Genus 2. Nummulina. Nummuline. 

 Shell discoid, suborbicular, depressed, with a plurilo- 

 cular spire, with complex walls, and arranged in the same 

 plane ; the two surfaces convex, the margin thin. 



1. NummuJina margindta. Margined Nummuline. 



Shell suborbicular, depressed, glossy, convex on one side, 

 conico-convex on the other, yellowish-white, with a very thin, 

 broad margin, separated by a circular groove fi-om the body 

 of the shell ; the internal spiral tube with few volutions. 

 Diameter about a fourth of a twelfth of an inch, height nearly 

 half the breadth. 



Individuals vary a little in form, some being perfectly orbicu- 

 lar, others less so, some with a slight angle. 



Found by me among shell sand, from the Bay of Cruden, 

 sent by Mr. Alexander Murray, in November, 1842. 



Renoidea marginata. Bro^n, Illustr. PI. 1. f. 25. The re- 

 ferences wrong, the shell indicated by them being Lagenula 

 marginata, fig. 30, 31, of the same plate. 



Genus 3. Discorbis. 



Shell discoid, spiral, formed of a series of oblique 

 lobiform cells, flattened beneath, convex above ; the upper 

 surface occupied by the last-formed whorl, the partitions 

 of which radiate obHquely from the centre to the margin; 

 the whorls on the lower disk exposed ; the partitions 

 generally imperforate ; the aperture small. 



1. Discorbis lohdtulus. Lohulafe Discorbis. 

 Shell depressed, spiral, lobed, generally roundish, but diversi- 

 form, convex above, with the centre depressed ; of two or 

 three whorls of oblique oblong or ovate lobes ; the first turn 

 exposed on the louver surface, the last occupying the upper, 

 both surfaces obliquely radiated from the centre by the parti- 

 tions of the cells, which are convex, frosted, and greyish-white ; 



