GASTEROPODA. 11 



Conovulus,* Lam. 1812. 



Melampus. Montf. 1810. 

 Conovula. Ferus. 1819. 

 Marinula, King. 1831. 

 Conovulum. G. B. Sow. jun. 1841. 

 Aricula, Lam. 

 Voluta (spec.) Linn. 



Gen. Cliar. Shell oval or elongate, subcylindrical ; with generally a smooth exterior 

 and short conoidal spire ; aperture rather long and narrow ; peritreme continuous, 

 with two or three folds upon the columella ; outer lip sometimes plain, occasionally 

 denticulated within. 



This was proposed, in the first instance, by Lamarck,- as a division of his exten- 

 sive genus Auricula, but was afterwards suppressed by himself. Mr. J. E. Gray has 

 recently adopted it in his edition of Turton's ' Manual of Land and Fresh Water 

 Shells,' as a distinction from the Auriculas, which are land shells. The Conovuli live 

 generally in water, and are found sometimes where it is purely fresh ; at others they 

 extend their range into the sea. 



1. Conovulus pyramidalis. /. Soto. Tab. I, fig. 13, a — b. 

 Auricula pyramidalis. «7". Sow. Min. Con. t. 379, 1822. 



Nyst. Coq. foss. de Belg. p. 473, pi. 39, fig. 12, 1844. 

 Conovulus pyramidalis. jS. Wood. Catalogue 1842. 



C. Testa ovato-ventricosd, striata, cr asset ; spird conoided pyramidali ; apice obtusius- 

 culo ; anfractibus 7 — 8 anyitstis, svperne conveccis, subcylindraceis ; aperturd ovato-oblongd 

 auriformi ; columettd biplicatd. 



Shell ovato-ventricose, striated? thick and strong, with a conoidal or pyramidal 

 spire, and a slightly obtuse apex; volutions about seven, elongated and subcylindri- 

 cal, with an ear-shaped aperture, and two folds upon the columella ; inner lip slightly 

 reflected, generally covering the umbilicus. 



Axis, \ of an inch. 



Locality. Red Crag, Sutton. 



Mam. Crag, Bramerton and Thorpe, near Aldborough. 



Found rather sparingly, in the Eed Crag, but abundantly in the estuary deposit, 

 at Thorpe, where the specimens are generally more perfect, though seldom so large. 

 It is a thick and strong shell, rather clumsily formed, with a sharp and simple outer 

 lip, somewhat thickened within, particularly at the lower part, and slightly contracted 

 in the middle ; the upper part of the volution slightly convex, sloping outwards, the 

 body of the shell nearly straight, contracting towards the base, with two folds upon 

 the inner lip ; the upper one sharp, prominent, and compressed ; nearly at right angles 



* 



Etym. Conus and ovulum. This name of Melampus has priority, and ought to have been the one 

 employed, but this having been used in my Catalogue is here retained. 



