MITRA. 117 



figure is from Gould's type, and I can add nothing to the above 

 meagre information concerning this curious form. 



M. DESETANGSII, Kiener. PL 34, fig. 34. 



More ventricose and thicker than M. variegata, less strongly 

 cancellated on the upper portion of the two last whorls ; with 

 three zones of spots upon the last whorl, one of them sutural, 

 and the other two separated by a wide very light reddish-brown 

 band. Length, 29 mill. 



Mauritius. 



Kiener's description and my figure (copied) are from a dead 

 and bleached specimen. Lienard gives the above particulars of 

 coloration, and acknowledges its close relationship to M.variegata 

 from which, nevertheless he distinguishes it. 



M. CANCELLATA, Kie'ner. PL 34, fig. 36. 



Whitish, cancellated and pitted. Length, 1*3 inches. 



Habitat unknown. 



This shell has been overlooked by subsequent monographers ; 

 I can make nothing out of it ; it is evidently in bad condition, 

 and only a single specimen is known, in the Massena Collection. 

 There is a M. cancellata, Swainson, a very different species. 



M. HAMILLEI, Petit. PL 34, fig. 37. 



Brown,, marbled and tinted with chestnut and olivaceous, 

 finely cancellated by revolving incised lines and close growth- 

 lines. Length, 1-5 inches. 



Cape Verd Islands. 



Distinguished by its compressed cylindrical form. A species 

 from Moreton Bay sent to the Philadelphia Academy as M. 

 cylindrica^ Reeve, by Dr. J. C. Cox, of Sydney, N. S. W., 

 appears to be identical with the above. 



M. SENEGALENSIS, Reeve. PL 34, fig. 38. 



Livid olive, longitudinally ornamented with a very few white 



flames ; aperture livid chestnut. Length, 1*3 inches. 



Senegal. 



M. GLABRA, Swainson. PL 34, fig. 42. 



Smooth, polished, with slight incised revolving lines ; base 

 truncated and a. little recurved. Orange-red, encircled by fine 



