348 EXPLANATION OF PLATES. 



27, 28. Callistochiton elenensis Sowb. Conch. 111., . . 267 



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



30-32. Callistochiton antiquus Rv. Emertou del., . . 274 



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



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

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

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



Voy. Am. Mer., . . . 272 



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



PLATE 60. 



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



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

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



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

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

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



^gypt, 



PLATE 61. 



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



23, 24. Callistoplax 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. Ceratozona 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., . . 301 



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



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



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 



