246 NAUTILUS. SAIL-SHELL. Class VI. 



2. ROTATUS. Lin. Tr. viii. 114. ISQ. /. 15. /. 4. id. Sup. 



N. calcar. Mont. Test. Br. 76. 



* N. with a spiral smooth shell ; aperture half 

 heart-shaped ; of six cells marked with elevat- 

 ed, flexuous striiS ; ridge very entire ; minute. 

 Inhabits the sea. 



3, LiEviGA- Lin. Tr. viii. 115. Mont. Test. Br. 188. id. 



TUL^S. Sup.75. t.l8.f.7,8. 



* N. with a spiral sliell and smooth joints 

 minute. 



Inhabits the sea. 



4. DEPRESSU- Lin. Tr. viii. 115. Mont. Test. Br. I90. id. 



^'^^- Sup. 78. t. 18./. 9. 



* N. with a spiral shell somewhat umbilicated 

 on the sides, joints numerous, depressed ; color 

 dull white ; minute. 



Found very rarely at Reculver in Kent. 



5. UMEILI" 



Lin. Tr. viii. 115. 



Mont. Test. Br. 19I. id. 



CATUtHS. 





Sup. 78. t. 18. /. 1. 



* N. with a spiral shell; umbilicated joints 

 furrowed ; minute. An inhabitant of the sea. 

 Sandwidh 



