PHYLLOBRANCHIA. TURBONIDE. : 197 
Inhabits the British sea; Sandwich, Kent ; Bideford and 
Torbay, Devon ; Dublin Bay. 
2. Mepor1A DANMONIENSIS. 
M. testa glaberrima, moderatim elevaté ; epidermide brunnea. 
Habitat in mari Danmoniensi Australi rarissimé. Mus. nost. 
in Mus. Brit. 
Shell very smooth, moderately elevated ; epidermis brown. 
Height three-eighths of an inch. 
Inhabits the sea on the southern coasts of Devon. 
This very rare species was discovered by Mr. J. Cranch, and 
has been found likewise by A. Prideaux, Esq. and by Mr. J. 
Gibbs in the Kingsbridge Estuary. 
3. MEDORIA TENEBROSA. 
M. testa glabra, mediocritér elevata; epidermide nigra aut 
brunnea. 
Turbo tenebrosus, Mont. Test. Brit. 303. t. xx. f. 4; Pult. 
Cat. Dorset. t. xvii. f.15; Flem. Edinb. Encycl. vii. 76 ; 
Dill. Dese. Cat. 782; Turt. Conch. Dict. 197. t. x. f. 36, 
37. 
Habitat in paludibus salinis Anglize et Hibernize rarissimé. 
Shell smooth, moderately elevated ; epidermis black or brown. 
Height two-eighths of an inch. 
Inhabits salt-marshes in England and Ireland. 
Genus 88. MarGaRITES. 
Testa planiuscula, apice paululim producto. Apertura ro- 
tunda. Umbilicus angustus. 
Animal incognitum. 
Shell rather flat, its apex a little produced; its aperture 
round ; its umbilicus narrow. 
Animal unknown. 
MARGARITES DIAPHANA. 
M. testa alba, zeneo-tincta ; anfractibus quinque, basilari fusco 
unifasciato. 
