189 



in each interspace. Spire, well elevated, with straight outlines. 

 Apex, rather sharp. Whorls, 5, well rounded, with a deep suture. 

 Aperture, almost exactly semicircular, rather depressed below. La- 

 brum, rather curvilinear in its plane, very slightly produced above, 

 pectinated strongly by the strong carinsc. Labium, moderately de- 

 tached from body-whorl, very slightly curved to the right below ; on 

 a plane with the labrum above, slightly lower below. Umbilicus, 

 moderately deep and broad. Labral lamella, produced broadly, but 

 sinking immediately into the umbilicus. Operculum, moderately 

 concave, with a rather broad margin, with, on the labral side, 5 or 6 

 raised lamellse converging towards the umbilicus, the labral side close 

 to its lower extremity bending to the right like the labium, and at 

 its very extremity furnished with a fine linguiform projection which 

 spreads slightly over the labium. 



Height 0-086, greatest breadth 0-14, least breadth 0*086. 



Named in compliment to John Pickering, Esq., an extensive col- 

 lector of British shells. 



This shell in many respects resembles L. Lindsleyana, but is much 

 larger, and its proportions under measurement are very dissimilar ; 

 its aperture is wider, and apex much sharper. 



Lindsleya Redfieldiana, Chitty. See Stoastoma Redfieldi- 

 anum, Adams. Mon. Stoas. Ad. 1849, p. 13 ; Cat. Phan. p. 229. 



Hab. Peace River, Manchester. 



Lindsleya Jayana, Chitty. See Stoastoma Jayanum, Adams. 

 Mon. Stoas. Ad. 1849, p. 14; Cat. Phan. p. 230. 



Hab. 1 Manchester. 



Lindsleya Leana, Chitty. See Stoastoma Leanum, Adams. 

 Mon. Ad. Stoas. p. 15 j Cat. Phan. p. 229. 



Hab. Peace River, Manchester. 



Lindsleya Denisoniana, Chitty. 



Hab. Moreland, Manchester. 



Form, globose-conic. Colour, pale horn. Sculpture, lines of 

 growth visible : 4 strong spiral carinse and 1 fine ; 6th strong, 

 7th fine ; 8th strong, and 9th and 10th fine; 11th strong, 12th to 

 loth fine; 16th strong, 17th to 19th fine; 20th strong, 21st to 

 23rd fine ; 24th strong, 25th and 26th fine ; 27th strong, and 28th 

 to 36th fine ; on upper whorls, 5 strong, with fine ones on the inter- 

 mediate spaces. Sjiire, much and concavely elevated. Whorls, 

 3f, convex, with a well-impressed suture. Aperture, more than a 

 semicircle, more angular above than L. Leana, very slightly con- 

 stricted and dilated again slightly, more so below ; less campanulate 

 than L. Leana ; aperture larger and wider above than L. Leana. La- 

 brum not produced above, continuous all round with labium, sharply 

 and slightly reflected at rather more than a right angle, with a ridge; 

 on the inner side, very slightly pectinated by about ten points of the 



