ADDITIONS AND CORRECTIONS. 475 



TROCHUS MILLELINEATUS Bonnet. PI. 22, fig. 55. 



Shell with a very deep umbilicus, nearly reaching to the apex ; 

 thick, little shining, yellowish, with elongated flexuous unequal 

 brownish-green spots and dots of the same color. Spire little 

 elevated, acute ; whorls 6, obliquely striate, the last very large, with 

 numerous irregular spiral ridges, stronger and numbering 6 on the 

 base, with obliquely striate interstices. Aperture oblique, rounded, 

 nacreous with greenish reflections and showing the folds inside. 



Alt. 19, diam. 21 mill. 



Torres Straits (7) . 



Trochus (monodonta) mille-lineatus BONNET, Revue et Mag. de 

 Zoologie, 1864, p. 281, t. 22, f. 5. 



My description is taken from that of Bonnet. The original figure 

 is copied. Bonnet gives for locality, " Jorres straits. " I do not 

 know the systematic position of this shell. 



MARGARITA SANDWICHIANA ("Ad.") Sowerby. PL 37, fig. 31. 



Shell subglobose, grayish fulvous, spirally striated, variegated with 

 blackish-brown tessellated spots ; whorls 3, last large, subglobose ; 

 aperture rather round ; columella rather thick, oblique ; umbilicus 

 broad. (Sowb. in Conch, Icon, xx, f. 8.) 



Sandwich Is. 



MARGARITA COSTELLATA Sowb. PL 37, figs. 10-12. 



Shell orbicular obtuse-conic, thin, brownish; whorls 4, tumid, 

 spirally ribbed, base subangulated, aperture suborbicular, sub- 

 angulate below ; umbilicus small. 



Greenland. 



M. costellata SOWB. Conch. & MaL Mag., p. 26 ; Conch. 111., f. 15. 

 Philippi, Conchyl. Cab., p. 245, t. 37, f. 3. 



T. METAFORMIS Philippi. PL 67, fig. 53. 



Shell turreted-conic, subperforate, thin, shining, olivaceous, painted 

 with scarcely visible spiral red lines; whorls nearly flat, a trifle 

 turgid, the last acutely angulated, i the total length of shell ; aper- 

 ture subrhombic ; columella little oblique, entire, cylindrical. 



Alt. 10, diam. 6f mill. (Phil.) 



Habitat unknown. 



T. metaformis Phil., Zeitschr. f. MaL 1849, p. 168 ; Conchyl. Cab., 

 p. 2%, t, 43, f. 13. 



