141 



1. areola, Deshayes. 



2. asperum, Hinds. 



3. caelatum, id. 



4. Cliemnitzii, Kiener. 



5. cingulum, id. 



6. c\\\i\ArSice.\\m,Deskayes. 



7. dealbatura, Hinds. 



8. fenestratum, id. 



Species. 



9. fragile, Hinds. 



10. fulvum, id. 



11. graniilatum, Lamarch. 

 13. liybridum, /(f. 



13. quadriceps, Hinds. 



14. Isevigatum, Lamarck. 



15. luteiim, ^W. 



16. maculatum. Reeve. 



17. magnum, Lesneur. 



18. perdix, Hinds. 



19. perspectivum, Z«m. 



20. placentale, Hinds. 



21. purpuratum, ?/7. 



22. stramincum, Lamarck. 



23. Troohoides, Deshayes. 



24. variegatum, Lamarck. 



25. virgatum, Hinds. 



Figure. 



SOLAEIUM MACULATUM. PL 13. 



pressed lenticular convolution. 



Fig. 62 



Shelly showing its very de- 

 ■Froni Mr. Cuming' n collection. 



Genus 15. DELPHINULA, Lamarck. 



Animal ; similar to that of Turbo. 



Shell ; turbinated, almost discoid, tubular and somewhat loosely 

 convoluted, mostly ornamented^ 2oith scales, spines, or tubercles, 

 frequently largely umbilicated ; aperture rounded, margins con- 

 tinuous, interior pearly, lip sometimes frilled. 



The Delphinula, first distinguished as a genus by Lamarck^ are chiefly 

 remarkable on account of their loosely convoluted growth and, so far as 

 regards the typical species, their luxuriant display of scales and tubercles 

 or spines. The shell has consequently a rounded aperture, with no colu- 

 mellar axis, and bears much the same relation to Turbo as Cijclostoma docs 

 to Helix, the animal being in either case, with trifling modification, the 

 same. There are, however, two very distinct sections of the genus, one 

 above referred to iis comprising the typical species, in wliich the shell is of 

 larger size, richer in colour, and of more luxuriant growth ; and the other 

 in which the shells, extremely delicate and curious in their detail of sculp- 

 ture, are somewhat stout, wliilst others are of comparatively thin texture, and 

 in some of which the interior is not pearly. Allied to these are one or two 

 rather fragile species, partaking in their general aspect of the character of 

 Cyclostoma and Sigaretus, and belonging probably to a different generic 

 type of which om* knowledge is at present insufficient."^ 



* An interesting example of tins group has just been sent me by Mr. Robert Swift, of 

 St. Thomas's, West Indies, described as having been picked up on the sea-beach by the Pastor of 

 the Dutch Reformed Church of that place. 



