147 



13. clathratulus,lfo«^a^w. 



14. clathrus, Eiener. 



15. cochlea, Sow. 



16. communis, Lam. 



17. concimia, Sow. 



18. comiexa, id. 



19. coronata, Lam. 



30. crassa. Sow. 



21. crassicostata, id. 



22. crassilabrum, id. 



23. creberrima. Hinds. 



24. crenata, Linn. 



25. ciu'vilineata, ;So2(?. 



26. decussata, Lam. 



27. (lenticulata, /Sb?<7. 



28. diadema, id. 



29. Dianse, Hinds. 

 80. dubia, /S'o?<;. 



31. Elenensis. id. 



32. fasciata, /Sow?. 



33. fragilis, Hanley. 



34. friabilis. Sow. 



35. fusca, «c?. 



36. Georgettina, Kiener. 



37. glabrata, Hinds. 



38. gracilis, ;S'o«j. 



39. gradata. Hinds. 



40. granulosa, Q. ^ O. 



41. Groenlandica, Kiener. 



42. liexagona, /Sow. 



43. hyalina, i(?. 



44. immaculata, id. 



45. imperiaUs, id. 



46. inconspicua, i<?. 



47. indistincta, id. 



48. irregularis, it?. 



49. laxata, id. 



50. lineata, Say. 



51. lineolata, Kiener. 



52. lyra, ^om>. 



53. magnifica, ^J. 



54. marmorata, id. 



55. Martinii, Wood. 



56. Mindoroensis, -Sow. 



57. Mitrsefoi-mis, id. 



58. multicostata, ic?. 



59. muricata, Kiener. 



60. Novangliae, CoMr^^owy, 



61. obesa. Sow. 



62. obliqua, id. 



63. obtusa, «(^. 



64. ovalis, id. 



65. Pallasii, Kiener. 



66. PliUippinarum, -^o?<?. 



67. polita, id. 



68. porrecta, Hinds. 



69. pretiosa, Za»?. 



70. principalis, Pallas. 



71. pulcberrima, /S'ow. 



72. pyi'amidalis, Sow. 



73. raricostata, Zaw. 



74. replicata. Sow. 



75. rubro lineata, z(?. 



76. simUis, id. 



77. statuminata, id. 



78. subtilis, ^(^. 



79. sidcata, id. 



80. suturalis. Hinds. 



81. tenuicostata, -Sbzo. 



82. tenuis, id. 



83. Trevelyana, Leaxih. 



84. trifasciata, /Sb««;. 



85. turricula, ic?. 



86. Turtonis, id. 



87. undulata, id. 



88. umfasciata, i(?. 



89. varicosa. Lam. 



90. venosa, -Sow. 



91. vestalis. Hinds. 



92. vulpina, id. 



Figure. 



ScALARiA iMPEEiALis. PI. 15. Fig. 74. Shell, exhibiting its tubular 

 structure and periodical deposit of annular varices. — From Mr. Cuming's 

 collection. 



Genus 17. MONOPTYGMA, Lea. 



Animal; unknown. 



Shell ; subfusiform or elongately subulate, rounded and imperfo- 

 rated at the base, columella distinguished by an obscure 

 winding plait, aperture small, entire. 



Por this genus we are indebted to Mr. Lea of Philadelphia, by whom it 

 was founded, upon a fossil species, in his ' Contributions to Geology,' 



u 2 



