120 M1TRA. 



M. CONTRACTA, Swainson. PL 35, fig. 53, 



Yellowish white, clouded with chestnut, engraved with revolv- 

 ing striae. Length, 1-1*5 inches. 



Red Sea; Philippines; Polynesia. 



The peculiar form of this species will at once distinguish it 

 from its neighbors. It is narrower and without the elevated 

 ridges of M. chrysostoma, and approaches the genus Mitroidea 

 in shape. It has been usually known as M. abbatis, Chemn., but 

 he was not a binomial author, so that I have preferred Swainson's 

 later name. 



M. LATRUNCULARIA, Reeve. PL 35, fig. 59. 



Whitish, obscurely banded, and tessellated with chestnut. 

 Length, 1-1-25 inches. 



Cape of Good Hope (Sowerby); Viti Isles (Garrett). 



M. SOLIDA, Reeve. PL 35, fig. 57. 



Fulvous bay-color, with irregular white spots in a series upon 

 the periphery, and another at the suture. Length, 18 inches. 



Australia. 

 M. PIGRA, A. Ad. PL 35, figs. 58, 60. 



Olive-brown, tessellated with white around the suture ; aper- 

 ture brown within. Length, 1*5 inches. 



Australia. 

 M. CALTGINOSA, Reeve. PL 35, fig. 61. 



Whitish, covered with a black epidermis. Length, 1*4 inches. 



Habitat unknown. 

 M. SACERDOTALIS, A. Ad. PL 35, fig. 62. 



Chestnut-brown, with a light band at the suture and another 

 on the peripher}", and longitudinal dark chestnut streaks. 



Length, 3 inches. 



Australia. 

 M. CHINENSIS, Gray. PL 36, figs. 65, 66. 



Pale brown under a brownish black, smooth epidermis ; upper 

 whorls and base of body-whorl with revolving stria-. 



Length, 2'25-3'5 inches. 



China. 



Sowerby's figure of this species (fig. 65) is much larger than 

 the type, and differs in having some obscure darker longitudinal 

 streaks and a light sutural line ; it is not very different from M 

 sacerdotalis. M. obliqua, Lesson, an unfigured species, is com- 





