215 



towards the base, dextral or sinistral, but little umbUicated ; 

 whorls five to six, more or less smooth or minutely line-engraved ; 

 columella thickened, flatly oppressed ; aperture someiohat squarely 

 ovate ; lip broadly flatly reflected, sometimes callous. 



Partula is another genus peculiar to Polynesia, but not restricted, like 

 Achat'mella, to a particular group of islands. It inhabits equally the Sand- 

 wich Islands, the Society Islands, the Friendly Islands, the Navigators', 

 and the Ladrones. It is a dwarf representative of the Continental genus 

 Bultmus, and follows in this respect the general law of geographical dis- 

 tribution affecting the animals and plants of islands of comparatively 

 recent submergence remote from the mainland. 



The species are not so numerous as those of the preceding genus, but 

 are tolerably abundant, and form an equally natural group. They are 

 much alike in form and substance, and are all more or less conspicuously 

 engraved with fine spirally impressed lines ; whilst the aperture is peculiar 

 in being produced somewhat obliquely, and in having mostly an ear-like 

 aspect, owing to the callous thickening of the lip being invariably broadly 

 flatly reflected. 



1. amabilis, Less. 



2. auricula, Fe'russ. 



3. brumalis, Reeve. 



4. Carteretensis, Quoy. 



5. compressa, Pfr. 



6. decussatula, id. 



7. denselineata, Reeve. 



8. dentifera, Pfr. 



9. faba, Martyn. 



10. filosa, Pfr. 



11. Ganymedes, Pfr. 



12. gibba, Quoy. 



13. glutinosa, Pfr. 



14. gonocheila, id. 



Species. 



15. Guamensis, id. 



16. Hebe, id. 



17. hyalina, Brod. 



18. inflata, Reeve. 



19. Isabelina, Pfr. 



20. lineata, Less. 

 21.Macgillivrayi, Pfr, 



22. micaus, id. 



23. Mastersi, id. 



24. mucida, id. 



25. Navigatoria, id. 



26. nitens, id. 



27. nodosa, id. 



28. Otaheitaua, Pfr. 



29. Pacifica, id. 



30. radiolata, id. 



31. repanda, id. 



32. Reeveana, id. 



33. rosea, Brod. 



34. rubescens, Reeve. 



35. Salomonis, Pfr. 



36. solidula, Reeve. 



37. spadicea, id. 



38. stenostouia, Pfr. 



39. suturalis, id. 



40. varia, Brod. 



Figure. 



Pautula. faba. PL 21. Fig. 115. Shell, showing the square, ear-like 

 aperture, with its flattened, broadly reflected lip. 



