REFERENCE TO PLATES. 



VOL. XVIIL 



FIGURE PLATE L 



1. Bacillum o'btusum Blf. Conch. Ind 1 



2. Bacillum orthoceras G.-A. Journ. As. Soc. Berg. ... 2 

 3, 12. Bacillum orthoceras G.-A. Original 2 



4. Bacillum orthoceras austeni Pils. Type 



5. Bacillum cassiacum Bs. Conch. Icon 3 



6. 7. Bacillum cassiacum Bs. Original 3 



8. Bacillum theobaldi Hani. Conch. Ind 4 



9, 10, 11. Bacillum erosum Blf. J. A. S. Beng 4 



PLATE 2. 



13, 14. Tortaxis pilsbryi Anc. Journ. de Conch 10 



15, 16, 17. Tortaxis permirus Anc. Journ. de Conch. ... 10 



18. Tortaxis mirus Gredl. Jahrb. d. M. Ges 8 



19, 20. Tortaxis mirus f uchsianus Hde. Specimen 9 



21, 22. Tortaxis m. f uchsianus Hde. Mem. Emp. Chin.. 9 



23. Tortaxis p. multiplicatus Anc. J. de C 10 



24, 25. Tortaxis erectus Bs. Specimen , 7 



26. Tortaxis erectus Bs. Conch. Caib 7 



27, 28, 29. Tortaxis mandarinus Pfr. Specimens 7 



30, 31. Tortaxis lubricus Dautz. Type 11 



PLATE 3. 



85-88. Prosopeas acutissimum Mouss. Specimen 22 



89-91. Prosopeas a. hastatum Bttg. Type 22 



92. Prosopeas laxispira Mts. Ostas. Landschn 26 



93, 94. Prosopeas holosericum Bttg. Specimen 24 



95. Prosopeas turricula Marts. Ostas. Landschn 30 



96. Prosopeas turricula Marts. Series Conch. IV 30 



97-99. Prosopeas roepstorfi Mch. Specimen 27 



PLATE 4. 



1, 2. Plicaxis miraibilis Sykes. J. of Malac 13 



3-5. Plicaxis perakensis Morg. Bull. Soc. Zool. Fr 13 



(341) 



