MITRA. 121 



pared by him with Chinensis ; its distinctive characters do not 

 appear to be important. 



M. STRiGATA, SAvainson. PL 35, lig. G3. 



Smooth, reddish brown, with lighter longitudinal streaks. 



Length, 2 inches. 



Habitat unknoicn. 

 M. Rosette, Angas. PI. 35, fig. 64. 



Deep orange-brown, longitudinally strigate with white ; with 

 distant impressed revolving strife. Length, 1'25 inches. 



So. Australia. 



The whorls are flatter than in the preceding species — Avith 

 which nevertheless it nia}^ be synonymous. 



M. SwAiNSONi, Brod. PI. 36, fig. 68. 



Turreted, with rather deep sntures, smooth, striated towards 

 the base ; brownish or dirty white covered with a blackish brown 

 epidermis. Length, 3*4-3*6 inches. 



Monte Christi, W. Columbia; sandy mud, 7 fathoms. 



Much larger than the next species, bnt may prove to be 

 identical with it ; the shoulder of the whorls, amounting to a 

 deformitj'jis exactly imitated in specimens of 31. maura before me. 



M. MAURA, SAvainson. PI. 36, fig. 61. 



Dirtj^ white or brown, with revolving striae ; coA'ered by a 

 smooth black or blackish brown epidermis ; aperture light 



chocolate. Length, l-2'25 inches. 



Peru, northwards to San Die go, Gal. 



This species attains its maximum development upon the 

 PeruA^an Coast, where it is plentiful, in fissures of rocks at low 

 water ; it is much smaller in the waters of California. Gray's 

 name, M. orie^italis, has priority, but is not adopted because 

 geographically misleading. It is the M. Chilensis of Kiener. 

 According to d'Orbigny the animal has a narrow foot, is pure 

 white, with black eyes. 



M. iNDUTA, Sowb. PL 36, fig. 70. 



Ver}^ obscurely striated, but strong!}' grooved towards the 

 base; outer lip thin, arched, A^er}^ minutely crenulated, smooth 



Avithin ; epidermis blackish brown. Length, 33 mill. 



Habitat unknown. 

 A doubtful species ; apparently founded on a single specimen. 

 16 



