OF CONCHOLOGY. 215 



ated ; spire rather short and acute, sutures well impressed ; 

 aperture strongly Urate within ; lip denticulate ; columella four- 

 plaited ; black, spire and upper part of body whorl spotted with 

 white, occasionally encircled with a single narrow white band, 

 transverse grooves reddish-brown. 



Remarks. — This species is allied to M. alveolus, Rve., and 

 more distantly to M. puella, Rve. 



Strigatella brunnea, Pease. — Plate 15, fig. 7. 



Description. — T. subobeso-ovata, crassa, solida, basi, spira et 

 anfr. ultimo, parte superiori, transversim tenuiter striatis, striis 

 remotis ; spira brevis ; labro simplici, superne calloso, vix sinu- 

 ato ; apertura superne angusta, ad basim efiFusa ; columella 

 quadriplicata, castanea, apice alba, apertura alba, polita, epider- 

 mide tenui induta. 



Dimensions. — Long. 21, diam. 10 mill. 



Shell somewhat stoutly ovate, solid, thick ; base, spire and 

 upper part of last whorl transversely, rather remotely finely 

 striate, most distinct on base ; spire short, about one-third the 

 length of the shell ; outer lip simple, callously thickened above 

 and slightly sinuate, just below the junction with body whorl ; 

 aperture narrow above, efiuse at base ; columella four-plaited ; 

 chestnut color, apex tipped with white, aperture polished, white ; 

 covered with a thin epidei'mis. 



Remarks. Belongs to the group represented by M. columhel- 

 liformis. 



Strigatella nigricans, Pease. Proc. Zool. Soc. London, 

 1865. 



Description. — T. fusiformi, elongata, laevigata, transversim ten- 

 uiter striata, striis subdistantibus, punctatis ; epidermide tenui in- 

 duta ; spira gracili, elongata, acuta ; labro simplici ; columella 

 quadriplicata ; nigrescente, fascia angusta, castanea cincta, 

 apertura plumbea. 



Dimensions. — Long. 20, diam. 7 mill. 



Shell fusiform, elongate, smooth, finely striated transversely, 

 strioe somewhat remote, punctured; covered with a thin epider- 

 mis ; spire slender, elongate, acute ; lip simple ; columella four- 

 plaited ; black, encircled by a narrow chestnut band, aperture 

 lead color. 



Thala alba, Pease. — Plate 15, fig. 8. 



Description. — T. elongata, gracilis, fusiformi, tenuiscula, 



