BY C. HEDLEY. 339 



Fig. 52. — Littoridina diemcnsis Frauenfeld, from a specimen of Amnicola 



diemense in the British Museum. 

 Fig. 53. — Iravadia clathrata A. Adams, from a specimen of Pyrgula 



clathrata in the British Museum. 



Plate xviii. 



Fig. 54. — Diala suturalis A. Adams, from a specimen of Monoptygma sulu- 



ralis in the British Museum. 

 Fig.55. — Diala picta A. Adams, from a specimen in the British Museum. 

 Fig.56. — Diala varia A. Adams, from a specimen in the British Museum. 

 Fig 57- — Diala pulchra A. Adams, from the type of Alaba pulchra. 

 Fig. 58. — Diala lauta A. Adams, from the type. 

 Fig. 59. — Diala monile A. Adams, from the type of Alaba monile. 

 Fig.60. — Diala pagodula A. Adams, from the type of Alaba pagodula. 

 Fig. 61. — Diala imbricata A. Adams, from the type of Alaba imbricata. 

 Fig. 62. — Alaba oibtx A. Adams, from the type. 

 Fig. 63. — Plesiotrochus unicinctus A. Adams, from the type of Ziziphinus 



unicinctus. 

 Fig. 64. — Caecum bimarginatum Carpenter, from the Australian specimen. 

 Figs. 65-66. — Caecum bimarginatum Carpenter, from the Singapore specimen. 

 Fig. 67. — Ccecum subquadratum Carpenter, from the type. 

 Figs. 68-69. — Ccecum rtgulart Carpenter, from the Singapore specimen. 

 Fig. 70. — C.(?) rtgulart from the Australian specimen. 

 Fig. 71. — Bivona constrictor Mcirch, from the type. 



Plate xix. 



Fig. 72. —Sttphopoma tricuspe Mcirch, from the tj'pe. 



Figs. 73,74. — Opercula of same. 



Fig. 75. — Mangtlia mitralis Adams & An gas, from the type of Belamitralis. 



Fig. 76. — Mangtlia australis Adams& Angas, from the type of Btla australis. 



Fig. 77. — Drillia aimula Angas, from the type. 



Fig. 78. — Murtx strotinus A. Adams, from the type. 



Fig. 79 — British Museum shell marked " (?) serotinus A. Ad., Aldinga." 



Fig. 80. — Rapana nodosa A. Adams, from the type of Rapana nodosa. 



Fig. 81.- Goralliophila tlaborata H. & A. Adams, from the type. 



Figs. 82,83. — Cassidula decussata H. & A. Adams, and enlarged sculpture, 



from one of the types. 

 Fig. 84. — Cassidula doliolum Petit, from one of the types. 

 Fig.85. — Ltuconopsis pellucidus Cooper, from the type of Auricula pellucida. 

 Fig.86. — Ophicardelus sulcatus H. & A. Adams, from the type. 

 Fig. 87. — Ophicardelus quoyi H. & A. Adams, from the type. 

 Fig. 88. — Ophicardelus stutchburyi Pfeiffer, from a specimen in the British 



Museum. 



