EXPLANATION OF PLATES, XVII. 343 



PLATE 22. 



FIGURE PAGE 



50^52. D. pressum Sh. & P. Pilsbry, del., . . . .124 



53-55. D. brevicornu P. & S. Pilsbry, del., . . . .125 



56,57. D. insolitum Smith. From Aon. Mag., . . . 109 



58-60. D. platyceras P. & S. Pilsbry, del., . . . .126 



61, 62. D. ophiodon Ball. Pilsbry, del., . . . .126 



PLATE 23. 



1. Cadulus quadrischistus Wats. From Chall. Kep., . .148 



2. Siphonodentalium tytthum Wats. From Chall. Rep., . 137 

 3-5. Entalina platamodes Wats. From Chall. Rep., . . 133 



6. Siphonodentalium pusillum Wats. From Chall. Rep., . 140 



7. Cadulus quadridentatus Dall. From Blake Rep., . . 149 

 8-21. S. vitreum ( lobatum). From Sars, . . .136 



PLATE 24. 



22. Cadulus gracilis Jeffr. From Chall. Rep., . . .165 



23. Cadulus gracilis Jeffr. From P. Z. S., . . . .165 



24. Cadulus gibbus Jeffr. From P. Z. S., . . . . 159 



25. Cadulus amphora Jeffr. From P. Z. S , . . . . 161 



26. Cadulus cylindratus Jeffr. From P. Z S., . . .166 



27. 28. Cadulus propinquus Sars. From Sars, . . . 166 



29, 31, 32. Cadulus subfusiformis Sars. From Sars, . . 163 



30, 33-38. Entalina quinquangularis Forbes. From Sars, . 132 

 39. Cadulus jeffreysi Monts. From Brit. Conch., . . .164 

 40-44. Siphonodentalium lofotense Sars. From Sars, . .138 

 45-47. Siphonodentalium affine Sars. From Sars, . . . 140 



PLATE 25. 



48. Cadulus sequalis Dall. From Blake Rep., . .170 



49. Cadulus acus Dall. From Blake Rep., . .191 



50. Cadulus watsoni Dall. From Blake Rep., . .167 



51. Cadulus vulpid ens Wats. From Chall. Rep., . .172 



52. Cadulus amiantus Dall. From Blake Rep., . .174 



53. Cadulus obesus Wats. From Chall. Rep., . .159 



54. Cadulus curcurbita Dall. From Blake Rep., . ' .161 



55. Cadulus lunula Dall. From Blake Rep., . .167 



56. Cad ulus sauridens Wats. From Chall. Rep., . .173 



57. Cadulus agassizi Dall. From Blake Rep., . .168 



58. Cadulus ampullaceus Wats. From Chall. Rep., . 158 



59. Cadulus congruens Wats. From Chall. Rep., . .175 



60. Cadulus curtus Wats. From Chall. Rep., . .175 



61. Cadulus exiguus Wats. From Chall. Rep., . . 159 



62. Cadulus rastridens Wats. From Chall. Rep., . .174 



63. Cadulus pandionis Verr. From Tr. Conn. Acad., . 171 



