80 THE NAUTILUS. 



his example has been followed, this action is quite illegitimate. For 

 the brown form is available the name of "fusca," apparently intro- 

 duced by Deshayes (op. cit., p. 53) for f. 4, pi. 235, of Sowerby's 

 Genera of Shells. 



R. biconica of the Manual represents a group rather than a species, 

 in which we may distinguish D. spinosum H. & A. Adams, Genera 

 I, 1851, p. 130, for Reeve's Ricinula, f. 12b ; D. iostomus A. Adams, 

 Proc. Zool. Soc., 1851, p. 267, and Gardiner, Fauna Laccadive, PI. 

 XXXV, f. 14; and R. andreivsi, Smith, P. Mai. Soc., VIII, 1909, 

 p. 369, fig. 



So the species grouped by Tryon under Ricinula, sensu stricto, may 

 thus be tabulated in revised nomenclature; synonyms in italics. 



1. DRUPA MORUM Bolten, 1798. 



R. violacea Schumacher, 1817. 

 R. horrida Lamarck, 1822. 



2. DRUPA IODOSTOMA Lesson, 1842. 



3. DRUPA GROSSULARIA Bolten, 1798. 



R. dactyloides Schumacher, 1817. 



R. digitata Lamarck, 1822. 



R. lobata Blainville, 1832. 

 var. fusca Deshayes, 1844. 



R. digitata Blainville, 1832. 

 var. laurentiana Petit, 1850. 



4. DRUPA RICINUS Linne, 1758. 



D. tribulus Bolten, 1798. 



M. hystrix Linne, 1758. 



R. arachnoides Lamarck, 1822. 

 var. elegans Brod. & Sowerby, 1828. 

 var. albolabris Blainville, 1832. 



5. DRUPA RUBUSCAESIA Bolten, 1798. 



R. clathrata Lamarck, 1822. 

 R. speciosa Dunker, 1867. 

 R. spathulifera Blainville, 1832. 

 var. miticula Lamarck, 1822. 



6. DRUPA RUBUSIDAEUS Bolten, 1798. 



R. reeveana Crosse, 1862. 



7. DRUPA BICONICA Blainville, 1832. 



8. DRUPA SPINOSA H. & A. Adams, 1853. 



9. DRUPA IOSTOMUS A. Adams, 1853. 

 10. DRUPA ANDREWSI Smith, 1909. 



