Class VI. NAUTILUS. SAIL-SHELL, 0,51 



Monf,Test.Br.Sup.S6.t.ig.f.5. 20. spinu- 



/^\\*' LOSUS. 



* N. with a shell with three globose articula- 

 tions of a pale chesnut color, covered with 

 reflected spines ; minute. 



Mo)iL Test. Br. Sup. 86. 21. bicari- 



NATUS. 



* N. with a subcylindric shell, bent, having 

 eleven subglobose bicarinated orbiculations ; 

 minute. 



MonL Test. Br. Sup. 87- t. 30. /. g. ' 22. linea- 



ris. 



* N. with a strait smooth glossy shell, some- 

 what tapering, a little compressed, with faint 

 iibs at the smaller end ; minute. 



