Mr. J. G. Jeffreys on British Odostomise. 109 



0. conoidea var. a. Arran Island, co. Galvvay ; Guernsey ; 

 Mr. Barlee. 



O. diaphana. Lerwick, Mr. Barlee. 



O. decor ata (n. s.). 



Testa ovato-oblonga, diaphana, nitida, alba, per dimidium in- 

 feriorem anfractus cujusque striis impressis undulatis circa 15 

 sculpta ; anfractus 5, convexi, ultimo plusquam § testa3 sequante ; 

 apex obtusus ; sutura subobliqua, profunde incisa ; apertura 

 ovata, subtus rotundata, superne ad mediam anfractus ultimi 

 inflexa ; peristoma columellarem umbilicum includens ; plica in- 

 conspicua. Long. T \y, lat. -fe unc. 



Burrow Island, Mr. Bean and Mr. Barlee. 



In my former paper I had confounded this species with O. ob- 

 liqua, but am now satisfied of its distinctness, by reason of the 

 spire being less oblique, the whorls more convex, the regular and 

 close striae on the lower half of each whorl, the absence of a fold 

 on the pillar, and especially of the well-defined umbilicus. I re- 

 ceived the species some years ago from Mr. Bean under the MS. 

 name of decorata ; and as this name has been used by British 

 conchologists, it may be inexpedient to change it for perhaps a 

 more appropriate appellation. It differs from O. diaphana in its 

 less cylindrical form and the greater convexity of its whorls, be- 

 sides possessing spiral striae and an umbilicus, which are wanting 

 in the other species. 



O. obliqua. Lerwick, Mr. Barlee. 



O. insculpta. Dunvegan, Skye; Oban; Burrow Island; Mr. 

 Barlej 



O. truncatula (n. s.). 



Testa oblongo-cylindrica, tenuis, nitida, alba, striis subtilibus 

 spiraliter corrugata praesertim in anfractibus apicalibus, longitu- 

 dinaliter ad suturam striis undulatis sculpta ; anfractus 6, con- 

 vexiusculi, turriculati, sensim increscentes, primo velut exciso ; 

 sutura obliqua, profunda ; apertura ovalis, superne in angulum 

 contracta, subtus effusa ; peristoma fere continuum, postice re- 

 plicatum ; umbilicus nullus ; denticulus conspicuus, plicseformis. 

 Long, f, lat. y 1 ^ unc. 



Plymouth, very rare ; Mr. Barlee. I have only seen one adult 

 specimen. This species has somewhat the form of " Turbo sub- 

 truncatus" Mont., which is the young of Truncatella Montagui ; 

 and the specimens recorded by Montagu as having been found 

 u in sand from Salcomb 9 ? may possibly be referable to it. It is 

 however a true Odostomia, and differs in form and markings from 

 any of its congeners. The animal appears to have a yellowish 

 colour. 



dolioliformis. Burrow Island ; west coast of Scotland ; 

 Mr. Barlee. 



