The Hon. E. Chitty on the Stoastomidse. 217 



very slightly expanded, more than a semicircle, spreading above and 

 below, very slightly detached from the body- whorl. Labrum, thin 

 and smooth, pectinated by about 10 points outwards, scarcely pro- 

 duced above. Labium, moderately detached from body-whorl, thin, 

 curved to the right below, on a plane with the labrum above, rather 

 lower below. Umbiiicus, rather broad, and suddenly very deep. 

 Labral lamella, considerably produced, more expanded above ; within 

 the umbilicus, and higher up the outside of the labium is another 

 lamella, almost as strong as the labral lamella. Operculum, slightly 

 concave, with about 1 2 very coarse granulations on the labral lower 

 side. 



Height 0-053, greatest breadth 0*067, least breadth 0*054. 



Named in compliment to Henry Adams, Esq., of London, the 

 conjoint author with his brbther Arthur Adams. 



LiNDSLEYA Alderiana, Chitty. 



Hab. John Crow Hill, Portland. 



Form, globose-conic. Colour, pale yellowish horn. Sculpture, 

 striae of growth visible ; 17 strong spiral carinae, with 1 fine in each 

 interspace, 3 fine intervening at the periphery, where the strong 

 carinse are wide apart ; on the upper whorls 3, with finer intervening. 

 Spire, well elevated, with slightly concave outlines. Whorls, nearly 

 5, moderately convex, with a moderate suture. Aperture, semicir- 

 cular, slightly expanded below. Labrum, slightly produced above, 

 rather reflected, scarcely detached from the penultimate whorl, rather 

 strongly pectinated by about 1 1 of the spiral carinse. Labium, very 

 slightly curved to the right, otherwise almost straight, moderately de- 

 tached from the body-whorl, rather below the plane of the labrum. 

 Umbilicus, very deep. Labral lamella, slightly produced. Oper- 

 culum, slightly concave, crossed horizontally by 5 lamellae, labial side 

 plaited vertically. 



Height 0-068, greatest breadth 0'086, least breadth 0-073. 



Named in compliment to Joshua Alder, Esq., of Newcastle. 



LiNDSLEYA Bridgesiana, Chitty. 



Hab. Bodle's Pen Wood (high road to Clarendon), St. Dorothy. 



Form, globose-conic. Colour, very pale horn. Sculpture, 19 

 strongly raised spiral carinse ; on the upper whorls 6. Spire, mode- 

 rately elevated, with rather concave outlines. Whorls, 4|, mode- 

 rately rounded, with a moderate suture. Aperture, semicircular, 

 very slightly expanded above, more so below. Labrum, scarcely de- 

 tached from body-whorl, slightly produced above, pectinated and 

 scolloped bluntly by about 15 of the carinse. Labium, straight, ex- 

 cept a slight curve below ; moderately detached from the body-whorl, 

 rather below the plane of the labrum in lower end. Umbilicus, deep. 

 Labral lamella, rather produced at its junction with the labrum, 

 moderately broad round the umbilicus. Operculum, moderately con- 

 cave, a very few coarse granulations, with 8 or 10 very short raised 

 lamellae converging to, but not reaching, the centre, on the labral 



