THE NAUTILUS. 



Vol.. XVI. MAY, 1902. No. 1. 



NOTES ON THE DISTRIBUTION OF THE PLEURODONTE SINUATA GROUP 



BY P. W. JAHVIS. 



Jamaican Pleurodontae fall into two distinct groups: those that 

 have two teetli on the peristome, with P. acuta as type (see last 

 article), and the four-toothed species, with P. sinuata and peracu- 

 tissima as types. 



The species of this second group are : 



1. P. valida (Ads.). 11. P. picturata (Ads.). 



2. P. strangulata (Ads.). 12. P. atavus (Sh.). 



3. P. sinuosa (Fer.). 13. P. lindsleyana (Chitty). 



4. P. siinpson (PtV.). 14. P. schroeteriana (Pfr.). 



5. P. invalida (Ads.). 15. P. tridentina (Fer.). 



6. P. anomala (Pfr.). 1(5. P. browneana (Pfr.). 



7. P. pallescens (Sh.). 17. P. sinuata (Mull.). 



8. P. bronni (Pfr.). 18. P. soror (Fer.). 



9. P. sloaneana (Sh.). 19. P. peracutissima (Ads.). 

 10. P. okeneana (Pfr.). 20. P. cara (Ads.). 

 Pleurodonte valida (Ads.) (No. 1 in ma|>), John Crow Mountains, 



in the extreme east of the island. This common woodland species 

 is very abundant in the north and eastern parts of this area. 1 



Pleurodonte strangulata (Ads.) (Area No. 2), not a common shell, 

 though rather widely distributed. The remarkable shape of the 

 aperture at once distinguishes it from its allies. 



^Specimens of P. valida. were taken near Hope Bay by C. W. Johnson and 

 W. J. Fox, in 1891. 



