PLATE XXXI. 



Fig. 1. Pleurotomaria Quoyana F. & B. Ehachidian and lateral teeth much 

 magnified. 1 b, one of the outermost uncini ; 1 e, one of the inner 

 tricuspid uncini greatly magnified. Page 397. 



2. Propilidium ancyloidc Forbes. Transverse row of teeth from above. 



2 b, rhachidian and lateral teeth in profile ; 2 c, jaw. All much 

 magnified. Page 412. 



3. Pleurotomaria, Adansoniana C. & F. Separated teeth numbered in 



their order from the rhachis ; o, rhachidian tooth. Page 400. 

 " 4. General view of a single transverse row of teeth. Page 400. 

 " 5. Same, a single tufted uncinus ; ^. Page 400. 

 " 6. Same, end of tufted uncinus ; ^p. Page 400. 

 i( 7. Cocculina spinigera Jeffreys. Penis from above magnified. Pages 



346, 348. 

 " 8. Cocculina sjrinigcra Jeffreys. Head from above, showing tentacles and 



position of penis at the side of the right tentacle, magnified. Page 



346. 

 " 9. Rhachidian tooth of C. spinigera. Page 346. 

 " 10. Scutellina antillarum (Shuttleworth) Auct. Showing rhachidian tooth, 



laterals and consolidated uncini of one side of a single transverse row 



of the radula ; 1 ^. Page 342. 

 " 11. The same, a single separated uncinus. Page 342. 



