MITRA. 121 



pared by him with Chinensis ; its distinctive characters do not 

 appear to be important. 



M. STRIGATA, Swainson. PL 35, fig. 63. 



Smooth, reddish brown, with lighter longitudinal streaks. 



Length, 2 inches. 



Habitat unknown. 

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



Deep orange-brown, longitudinally strigate with white ; with 

 distant impressed revolving striae. Length, 1*25 inches. 



So. Australia. 



The whorls are flatter than in the preceding species with 

 which nevertheless it may be synonymous. 



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



Turreted, with rather deep sutures, 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, but may prove to be 

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

 deformity, is exactly imitated in specimens of M. maura before me. 



M. MAURA, Swainson. PL 36, fig. 6T. 



Dirt}' white or brown, with revolving striae ; covered by a 

 smooth black or blackish brown epidermis ; aperture light 



chocolate. Length. l-2'25 inches. 



Peru, northwards to San Diego, Gal. 



This species attains its maximum development upon the 

 Peruvian 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. orientalis, 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. TO. 



Very obscurely striated, but strongly grooved towards the 

 base ; outer lip thin, arched, very minutely crenulated, smooth 



within ; epidermis blackish brown. Length, 33 mill. 



Habitat unknown. 



A doubtful species ; apparently founded on a single specimen. 

 16 



