348 EXPLANATION OF PLATES. 



27, 28. Cailistochiton elenensis Sowb. Conch. Ill, . .267 



29, 34. Cailistochiton antiquus Rv. Pilsbry del., . . . 274 



30-32. Cailistochiton antiquus Rv. Emerton del., . . 274 



35. Cailistochiton antiquus Rv. Conch. Icon., . . . 274 



36. Cailistochiton coppingeri Sm. ' Alert ' Zool., . . . 275 

 37-42. Cailistochiton infortunatus Pils. Foord, del., . . 266 

 43, 44. Cailistochiton bicostatus Orb. (=pulchellus Gray). 



Voy. Am. Mer., 272 



45. Cailistochiton adenensis Smith. P. Z. S., ... 276 



PLATE 60. 



1. Cailistochiton pulchellus Gray. Spicil. Zool., . . . 271 



2. Cailistochiton pulchellus Gray. Conch. Icon., . .271 

 3-6. Cailistochiton pulchellus Gray. Pilsbry del., . . 271 



7-10. Cailistochiton gabbi Pils. Pilsbry del., . . .270 

 11-15. Cailistochiton (?) heterodon Pils., .... 276 

 16. Cailistochiton (?) heterodon var. savignyi Pils. Savig. 



^Egypt, 277 



PLATE 61. 



17-22. Callistoplax retusus Sowb. Emerton del., . . 288 



23, 24. Calliscoplax retusus Sowb. Emerton del., . . .288 



25. Callistoplax retusus Sowb. Conch. Illustr., . . 288 



26. Callistoplax retusus Sowb. Conch. Icon., . . . 288 

 27-32. Angasia tetrica Cpr. Emerton del., .... 287 



33. Ceratozona rugosa Sowb. Conch. 111., .... 290 



34. Ceratozona rugosa Sowb. (Santa Cruz). Pilsbry del., . 290 



35. Ceratozona rugosa Sowb. Pilsbry del.,. .... 290 



36. Ceratozona rugosa Sowb. (Jupiter Inlet). Pilsbry del, . 290 



37. Ceratozona guildingii Rv. (=rugosa Sowb.) Conch. 



Icon., 290 



38. 39. Ceratozona setosa Sowb. Emerton del., . . .292 

 40. Ceratozona setosa Sowb. Conch. 111., . , . 292 

 41-45. Ceratozoua rugosa Sowb. Emerton del., . . . 290 



PLATE 62. 



84, 85. Placiphorella stimpsoni Gld. (tail valve). Pilsbry del., 307 



86. Placiphorella stimpsoni Gld. (girdle-hair). Carpenter del., 307 



87. Placiphorella stimpsoni Gld. Ross del., . . . 307 

 88-92. Mopalia middendorffii Schr. Amurl. Moll., 



93. Mopalia muscosa var. porifera Pils. Pilsbry del., . . 297 



94. Mopalia muscosa var. porifera Pils. Ross del., . . 297 



95. Mopalia sinuata Cpr. (girdle). Emerton del., . . 303 

 96 (upper fig.). Mopalia sinuata Cpr. Ross del., . . 303 

 96 (lower three figs.). Mopalia sinuata Cpr. (tail valve). 



Emerton del., 303 



