30 MITRA. 



402. costellaeis (f. 24, 25), Lamarck. — Ribs defined, 

 whorls very angular. 



403. vuxpecula (f. 10-14), Linnaeus. — Ribs undefined, 

 large ; angle rounded and sloped. 



404. umbrosa (f. 123), Sowerby. — The colouring of the 

 shell is dark rich burnt brown ; ribs more defined than in 

 M. vulpeaula,, raised into tubercles at the angle of the 

 whorls. 



405. pullata (f. 43), Reeve. — Resembling M. ritlpccula, 

 between it and pKcata, but distinct from both. 



405*. vittata (f. 121, 122), Sivainson. — Zool. Illust., 1st 

 series. 



40G. plicata (f. 26) Klein. 



407. cinctella (f. 27), Lamarck 



408. capfea (f. 20, 21), Linnaeus 



409. intermedia (f. 36, 37), Kiener. — Although some 

 varieties occur shortened and corrugated almost like M. 

 corrugata, and others with a smoothness approaching to M. 

 vuVpecvla, the species is not difficult to distinguish. M. 

 hybrida, Kien., is only a worn shell of this species. 



410. corrugata (f. 41, 42), Lamarck. 



411. Jukesii (f. 115, 116), A. Adams. 



412. Gruneri (f. 130, 131), Reeve. 



413. LiEVicosTATA (f. 139), Soiverhy. — A pretty little shell 

 with rounded ribs and delicate spiral lines ; only named 

 provisionally here because not fully developed. 



414. nasuta (f. 623), Suwerby. — Testa subfusiformi, alba; 

 costis sinuatim arcuatis, tenuibus ; striis spiralibus subdis- 

 tantibus ; spira, longitudine aperturam aequanti ; ultimo 

 anfractu antice coarctata, attenuate, recurvo. — Shell subfu- 

 siform, white, with thin, sinuously curved, rather distant 

 ribs ; spire equalling aperture in length ; last whorl an- 

 teriorly narrowed, attenuated, recurved, 



