r ZOU 
90. 
Dr. Marox's and Mr. RACKETT's 
umbilica- H. testa subconica, subpellucida, striata, anfractibus 
fa. 
ot. 
Trochi- 
formis. 
quinis teretibus, umbilico ampliore. . 
Montagu Test. Brit. p. 434. t. 13. f. 2. 
Pulteney in Hutch. Dorset. t. 19. f. 24. 
Habitat subter saxa et tecta imbricata, Incola niger. 
Testa diametro 41, poll., fusco-cornea, anfractibus rotundatis, eminentibus, 
fere disjunctis, subtiliter striatis. Apertura subrotundo-lunata. Labrum 
tenue. Umbilicus adeo profundus, ut anfractus 1 interne usque ad apicem 
conspiciendi. Apex obtusior. E: 
Distinguitar ab H. radiata, quod omnino fusca, magis convexa, an- - 
fractuum suture evidentiores, et strie vix oculo armato discer- 
nendz. 
First discovered and figured by Mr. Montagu, who 
found it on walls, near Tenby, Caermarthenshire ; un- 
der loose stones, in Portland ; and on the top of Corfe 
Castle, Dorset; also under the tiles of Laycock Abbey, 
and ane Hae) Wilts. 
H. testa Abiba subconica, lævi; apertura sub- 
lunata, transversim Compressa.. ‘Montagu Test. Brit. 
p. 421. t. 11. TF: Ele EE 
Lister Anim. Angl. p. 123. or = 
Act. Angl. n, 105. f. 9.? ioe 
Muller Verm. 2. p.19. n. 216. 
Da Costa Brit. Conch. p. . 95. 
Halitat super truncos arborum putrescentes, rarior. 
ss diametro 4 poll., tenuis, pellucida, cornea, vel rufescens. Anfractus 
(sex rotundati, leves, glabri, sutura manifesta. Labruni tenue, in se- 
oribus ad angulum inferiorem paululum reflexum, sub umbilicum 
- formans, Apex quam maxime roductus. (Montagu.) | 
Found : án Wiltshire and Devonshire, RP a et 
pou. c o E Free 
