8 MITRA. 



91. rupicola (f. 169) j Reeve. 



92. vultuosa (f. 557), Reeve. — -Not so obtuse or thick as 

 M. muricata. 



93. ntjcleola (f. 397), Lamarck. 



94. sph^erulata (f. 38), Martyn. — Sculptured with thick 

 beaded ridges. 



95. crenifera (f. 29, 30, 31), Lamarck. — Texture much 

 closer and finer than M. sphceridata. 



96. scabrioscula (f. 33, 34, 35), Linnaeus. — Sculptured 

 with thin beaded ridges. 



97. gracilis (f. 187), Reeve. — Shell narrow, ridges spotted. 



98. pretiosa (f. 236), Reeve. — Finely spotted and beaded. 



99. antonii (f. 245), A. Adams. 



100. pura (566), A. Adams. — White, with beaded sculp- 

 ture. 



101. Strangei (f. 289), Angus. — A very delicately sculp- 

 tured white shell. 



102. Isabella (f. 55), Swainson. 



103. pia (f .550), Dorhn. — Sculptured with sharp and dis- 

 tant beaded ridges. 



104. Morchii (f. 78), Dorhn. — The shell is less graceful 

 and more cylindrical than M. Isabella ; with a flattened and 

 duplicate character in the ridges. 



105. loricata (f. 147, 148), Reeve. — Granulated in squares. 



106. Peasei (f. 76), Dorhn. — White, with raised striae. 



107. aiGEA (f. 112), Reeve. 



108. Norrisii (f. 68), Reeve. — Ventricose and puncture- 

 striated. 



109. nivea (f. 77), Sivainson. — More graceful and pyra- 

 midal in form than M. Norrisii. 



110. filosa (f. 82, 83), Bom. — Set with circlets of brown 

 beads. 



