GENA.— Plate I. 



tlie middle ; aperture elongated, outer lip flexuous 



above the middle. 

 A. Adams. Proc. Zool. See, 1850. 

 Ilab. Isl. Mindoro, Philippines. 



Species 5. (Fig. «, 6, Mus. Brit.) 



Gkna concinna. Gen. tcsld parvd, inflatd, subobliqud, 

 albidd, rubra variegatd ; spird productd, acumi- 

 natd ; ultimo mifractu obliquo, superne declivi ; 

 aperturd mediocri, intus variegatd. 



The neat Gena. Shell small, inflated, rather oblique, 

 whitish, varied with red ; spire produced, acu- 

 minated ; last whorl oblique, sloped above ; 

 aperture medium-sized, variegated within. 



Gould (Stomatia). Shells of American Expedition. 



Hab. Sandy Island. 



This little species has the form which more usually 



characterizes the StomaticT. 



Species 6. (Fig. a, b, Mus. Brit.) 

 Gena lineata. Gen. testd parvd, inflatd, suborbictilari, 

 subrosed, lineis rubris obliquis ornalA ; spird 

 parvd, acuminatA ; aperturd subrotundd ; lahio 

 columellari albd, latd, planulatd. 



The lineated Gena. Shell small, inflated, suborbicular, 

 pinky, ornamented with red, oblique lines; spire 

 small, acuminated ; aperture rather rounded, 

 columellar lip white, broad, flattened. 



A. Adams. Proc. Zool. Soc, 1850. 



Hab. ? 



This pretty little shell was in the Cumingiaii collec- 

 tion, but its locality was unknown. 



Species 7. (Mus. Brit.) 



Gena plumbea. Gen. testd auriformi, latd, plumbed, 

 minutissime decussatd, medio et infra inflatd, suprd 

 medium depressd, ad suturam subgi,bosd; aperturd 

 oblongd, labio externa sinitato. 



The lead-coloured Gena. Shell ear-shaped, broad, 

 lead-coloured, very minutely decussated, inflated 

 in the middle and under, depressed above the 

 middle, a little gibbous at the suture; aperture 

 oblong, outer lip sinuous. 



A. Adam.s. Proc. Zool. Soc, 1850. 



Hab. Java. 



The dull leaden colour of this shell gives it a pecul'ar 

 appearance ; and the minute crossing striae form a 

 character worth noting. 



