112 MITRA. 



M. LAMARCKII, Deshayes. PI. 32, fig. 5. 



A somewhat narrower shell than M. cardinalis, with fewer and 

 larger spots, which are longitudinally oblong. 



Length, 2-2'25 inches. 



Habitat unknown. 



It is possibly a variety of cardinalis in which approximate 

 rows of spots have coalesced into larger ones. 



M. VERSICOLOR, Martyn. PI. 32, figs. 6-8. 



Yellowish or brownish white, variegated with chestnut-brown 

 blotches and spots, and numerous small white spots edged with 

 brown. Length, 2*25 inches. 



Red Sea, Zanzibar, Madagascar, Polynesia. 



The surface is usually ornamented with revolving incised 

 lines bearing punctures. Several species have been manufactured 

 out of slight variations of color and form ; they can scarcely be 

 designated as varieties. Among these are M. nebulosa, Swains. 

 teste Reeve (fig. 8) ; it is more clouded than the type, and with- 

 out the white spots ; M. nubila, Gmel.,in which the spots become 

 longitudinal, and narrowed into stripes ; M. erronea, Dohrn, 

 proposed for the shell figured by Kiener as M. versicolor (fig. 

 t); and Reeve's figure of M. nebulosa (fig. 8), the true nebulosa 

 being, according to Dohrn, figured by Reeve as M. infecta, 

 drawn, he says, from the original type of nebulosa in the Cum- 

 ingian Collection. To add to the confusion, Arthur Adams, at 

 an earlier date, decided also that Reeve's nebulosa was not that 

 species, and accordingly renamed it M. propinqua. Finally, the 

 shell which Sowerby figures as M. propinqua, A. Ad., is an 

 entirely distinct species. 



M. PROPINQUA, Sowerby. PI. 33, fig. 11. 



White, with faded chocolate bands and longitudinal brown 

 strigations. Length, 2'8 inches. 



Habitat unknown. 



Figured by Sowerby for M. propinqua, A. Adams, but no 

 such species was ever described, Mr. Adams having given that 

 name to Mr. Reeve's M. nebulosa, which he considered different 

 from Swainson's. It seems to be a very distinct species. 



