PLATE 16. 



STYLOSPH^RIDA et DRUPPULIDA. 



Diam. Page 



Fig. 1. Stylosphcera melpomene, n. sp., . . . . x 300 135 



Fig. 2. Lithatractus jugatus, n. sp. (vel Stylosphcera jugata), . x 400 323 



Fig. 3. Lithatractus fragilis, n. sp. (vel Stylosphcera fragilis), . x 400 319 



Fig. 4. Stylosphcera lithatractus, n. sp., . . . x 300 



The entire shell. 



Fig. 5. Stylosphcera lithatractus, n. sp., . . . x 300 



The greater part of the cortical shell and the two spines taken ofi. 

 The description of Stylosphcera lithatracttts (intermediate between 



Stylosphtera jugata and Stylosphcera terpxichore, p. 137) is by 



mistake not given in the text. 



Fig. 6. Stylosphcera calliope, n. sp., . '. . x 400 134 



Fig. 7. Stylosphcera clio, n. sp., . . . . . x 400 134 



Fig. 8. Druppatractus ostracion, n. sp., . . . x 300 326 



The entire shell 



Fig. 9. Druppatractus ostracion, n. sp., . . . x 300 326 



The anterior half of the cortical shell has been removed. 



Fig. 10. Druppatractus hippocampus, n. sp., . . x 300 324 



The entire shell 



Fig. 11. Druppatractus hippocampus, n. sp., . . x 300 324 



The greater part of the cortical shell has been removed. 



Fig. 12. Stylosphcera nana, n. sp., . . . . . x 300 136 



The entire shell. 



Fig. 13. Stylosphcera nana, n. sp., . . . . x 300 136 



The greater part of the cortical shell taken off. 



Fig. 14. Sphcerostylus ophidium, n. sp., . . . x 300 140 



The entire shell 



Fig. 15. Sphcerostylus ophidium, n. sp., . . . x 300 140 



The medullary shell alone. 



Fig. 16. Saturnulus ellipticus, n. sp., . . . x 400 141 



Fig. 17. Saturnulus planetes, n. sp., . . . x 400 142 



