Thr lion. E. Chitty on the Stoastomidae. 217 



ven' slightly expanded, raore than a semicircle, spreading above and 

 below, very sliglitly (letaclicd from the body-whorl. Labrum, thin 

 and smooth, pectinated by al)()ut 10 points outwards, scarcely pro- 

 duced above. hab'unn, uioderatcly detached from body-whorl, thin, 

 curved to the right l)elow, on a plane with the labrum above, rather 

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

 Lafjra! 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 0053, greatest breadth 0067, least breadth 0054. 



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

 conjoint author with his brother Arthur Adams. 



LiNDSLKYA Aldkriana, Chitty. 



Hab. John Crow Hill, Portland. 



Form, globose-conic. Colour, pale yellowish liorn. Scvlpture, 

 stria? of growth visible ; I 7 strong spiral carinae, with 1 fine in each 

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

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

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

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

 cular, slightly exj)anded below. Labrum, slightly produced above, 

 rather reflected, scarcely detached from the penultimate whorl, rather 

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

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

 tached from the bodv-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 0-06S greatest breadth O-OSfi, least breadth 0073. 



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



LiNDSLKVA 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 carinae ; on the upper whorls 6. Spire, mode- 

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

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

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

 tached from body-whorl, slightly produced above, j.ectinated and 

 scolloped bluntly by about 15 of the carinae. 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 



