217 



DESCRIPTION OF A NEW SPECIES OF LA TIE US. 

 By James Cosmo Melvill, M.A., F.L.S. 



Head lith December, 1906. 

 Latirus (Peristernia) Sowerbyi, n.sp. 



L. testa mediocri, fusiformi, utrinque attenuata, solida, anfractibus 7, 

 apice parvo, laevi, caeteris ad suturas pauUum impressis, quatuor 

 supernis (apicali excluso) gradatim mnltum attenuantibus, ultimo 

 caeteris essuperante, apud basim attenixante, undique costis crassi- 

 usculis decoratis, nigro-brunneis vel (in uno speciraine) castaneis, 

 spiraliter crassiliratis, liris irregulariter hie illic nitide albopustulatis, 

 prgesertim prope basim, apertura lactea vel violascente, pyriformi, 

 subtus elongata, canali producto, columella nitida, obscure triplicata. 

 Long. 19, lat. 8 mm. 



Mab. — Galapagos Isles (?). 



A remarkable little Peristernia, much attenuate at either extremity. 

 The thickened, dark or chestnut-coloured longitudinal ribs, and white 

 shining scattered pustules, more gregarious near the base of the body- 

 whorl, are likewise characteristic, as is the pyriform aperture, much 

 narrowed basally, the canal being somewhat prolonged. Four 

 examples, supposed to be from the Galapagos Islands, but a slight 

 element of uncertainty exists as to this. I am much indebted to 

 Mr. G. B. Sowerby for handing me this interesting species with a view 

 to description, and it gives me pleasure to connect his name with it. 

 The type has been placed in the British Museum (Natural History). 



VOL. VII.— MARCH, 1907. 



