82 FAUNA OF THE CORNBRASH. 



Genus CLOUGHTONIA, Huclleston. 



This genus, established by Huclleston in 1882 (' Geol. Mag.' [2], vol. ix, p. 203), 

 is thus defined by its author : " Shell short, conical, and solid, with a widish base ; 

 shell substance thick. Whorls about 5, flat and angular ; body whorl more or 

 less bicarinated, with slight depression of the intervening space. Surface smooth 

 or ornamented with rugose lines of growth. Aperture ovate to ovate-oblong, 

 rounded anteriorly. Pillar nearly straight and with little or no callus." The 

 author now places this amongst Fseudomelaniadae ; but it is a little difficult to range 

 a genus whose diagnosis commences " shell short " in a family stated to have its 

 " shell elongated." This, at all events, is impressed on one by the shell described 

 below, which shows an extreme approach to a Natica. 



Cloughtonia depressa, sp. nov. Plate VIII, fig. 8. 



Type. — Spiral angle 95°. Extreme height 25 mm. Breadth of last whorl 23 

 mm. Whorls 4. Upper whorls squarely rounded. Body whorl in cast is swollen 

 round the suture, then slightly hollowed out anteriorly to this, then swollen along 

 a spiral line. Beyond this it is rapidly bent inwards to form the inner boundary 

 of the aperture, the outer lip at the same time expanding longitudinally. Any 

 umbilicus would probably be covered by the very thick shell, which, however, 

 becomes thin where preserved between the matrix filling the aperture and the pen- 

 ultimate whorl. Surface of cast quite smooth. From Sudbrook. In the Sedgwick 

 Museum. 



It is probable that the irregularity of the spire and the expansion of the outer 

 lip are due to pressure on the matrix. The swelling round the suture may not 

 indicate any such swelling on the shell, but rather its hollowing out within, for 

 the apparent furrow between it and the penultimate whorl is entirely filled with 

 the shell substance, broken off above and thinning greatly below. 



Distribution and Relations. — Only this one specimen has been seen. The aspect 

 of the matrix seems certainly to confirm its derivation from the Cornbrash, and it 

 thus forms a link between the somewhat similar shells in the Inferior Oolite and 

 the Portland (see Hudleston, he. cit., p. 203). The drawing in of the body 

 whorl on the inner side may be more or less characteristic of the genus. 



Turbinoid Shells. 



Some various records of Turbinoid shells are as follows : 

 *Amberleya armigera (34, 39, 50). *Littorina jihillijm (43, 50). 



