204 DOLTUM. 



It is I>. fasciatum, vtir., of Kiener (fig. 19); D. lactescent, 

 Martyn ; D. latesulcatum, Martini ; D.ampullaceum, l'hil.(tig.20). 



Var. MACULATUM, Lam. PI. 4, fig. 21. 



The costse, nine to eleven in number, maculated somewhat 

 regularly with chestnut. This has been regarded as a distinct 

 species, but a series before me connects the two; intermediates 

 also connect this variety with 



Var. FIMBEIATUM, Sowerby. PL 4, fig. 22 ; PL 3, fig. 18. 



The ribs usually vary in number from twelve to fourteen, 

 tessellated with chestnut. The name is derived from the fim- 

 briated margin of the outer lip, but this is common to all the 

 varieties when fully grown. 



Senegal, Manilla, Japan. 



If these two varieties had not been recognized ver} T generally 

 as distinct species, I would not have separated them as even 

 varietal forms, as their features want constancy. D. cassis 

 (Bolten), Morch ; Buccinum dolium, Linn.; D. minjac, Adan- 

 son, and D. tessellatum, Encyc. Meth.. are names given to the 

 two varieties, but not readily assignable to either separately. 

 The Senegal locality is given on the authority of Adanson. D. 

 Lischkeanum, Kiister (fig. 18 , is a full synonyn of var. fimbri- 

 atum, as are probably the unfigured D. Reevei, Hanley, and 

 possibly D. Favannei (likewise unfigured) of the same author, 

 and D. marginatuin, Philippi (unfigured). 



D. PERDIX, Linn. PL 3, fig. 15 ; PL 4, figs. 23-25. 



Shell thin, inflated, with about twenty low ribs, and rather 

 narrow shallow intervening grooves ; fulvous brown or light 

 reddish bay, more or less plentifully marked with whitish lunate 

 spots or maculations. Length, 5-9 inches. 



Indian Ocean, Mauritius, Polynesia, 



Mrs/ Africa, We*t Indie*, Hrazil. 



There can he no doubt of the immense distribution of this 

 species. Dr. Jacob Green, many years no-o described a shell as 

 D. plumatum which has been supposed to be the West Indian 

 D. i>erdix,&nd Prof. M-irch has called it D. /n-nnnfii'tn ; it has no 

 distinctive features. Other synonyms are Perdix rcticulatux, 

 Montfort ; Dolunii ////'/////. lilninv. Fischer lias described and 





