145 



All the Belphinula, excepting those just spoken of, are inhabitants of 

 the eastern world, principally in the vicinity of the Philippine Islands, 

 China, and Malacca; the I). Tj/ria, incisa, and Peronii, three most 

 characteristic species, are from New Holland.' 55 ' 



1. aculeata, Reeve. 



2. atrata, id. 



3. australis, Kiener. 



4. cancellata, id. 



5. cidaris, Reeve. 



6. clathrata, id. 



7. Cobijensis, id. 



8. crenata, Kiener. 



9. depressa, id. 



Species. 



10. discoidea, Kiener. 



1 1 . distorta ( Turbo) , Linn . 



12. evoluta, Reeve. 



13. formosa, id. 



14. imperialis, id. 



15. incisa, id. 



16. laciniata (Turbo), L. 



17. nmricata, Reeve. 



18. nivea (Turbo), Chemn. 



19. nodosa, Reeve. 



20. Peronii, Kiener. 



21. radiata, id. 



22. Eeeviana, Hinds. 



23. Scalarioides, Reeve. 



24. spkserula, Kiener. 



25. syderea, Reeve. 



26. Tyria, id. 



27. varicosa, «?. 



Figure. 



Delphinul a imperialis. PL 15. Pig. 77. Shell, showing its rounded 

 aperture, loosely convoluted tubular structure and luxuriant ramified 

 growth. — From Mr. Cuming's collection. 



Genus 16. SCALARIA, Lamarck. 



Animal; cylindrical, disk short and nearly square ; head short, 

 obtuse, flattened, with a pair of small sessile eyes, situated at 

 the outer base of the tentacles. Operculum horny, spiral. 



Shell ; tubularly turreted, the lohorls being rarely contiguous and 

 encircled throughout with a greater or less number of elevated 

 ribs ; aperture round, margin continuous and reflected. 



There are few mollusks which produce a more delicate and beautifully 

 symmetrical shell than the Scalaria ; no shell has been more highly prized 

 by the amateur than the Wentle-Trap, and none in which the absence of 

 colour is so lavishly compensated by delicacy and variety of sculpture. 

 Although a species inhabits the seas of Europe in tolerable abundance, 

 the soft parts have not been very fully described ; sufficient is known of 

 the animal to show that it is closely allied to Delpltimda, and, as in most 



* The small white Delphinulee are so far removed from the typical species of the genus, that 

 it would be as well to adopt the genus Liotia under which they have been separated by Mr. Gray. 



