430 PYEAMIDELLID^E. 



CH. SANDVICENSIS, nobis et Walker, Test. Min. liar. 



Odostomia dolioliformis, Brit. Moll. iii. p. 301, pi. 97. f. 5; and iv. 



p. 281. 

 , Jeffreys. 



Testa subovalis, inflate, subpellucida, pruinosa, anfractibus quatuor, 

 duobus ultimis tumidis, superne turriculatis, lineis flexuosis, spi- 

 raliter cinctis, striis increment! promhmlis, densis, obliquis, decus- 

 satis ; anfractu basali, plusquam dimidiam testae superante. Apex 

 in gyrum sequentem reflexus. Apertura subovalis, ad basin 

 rotundata, effusa, supra in brevem rectangulum desinens. Labium 

 columnare reflexum, incrassatum, umbilicum angustum obtegens, 

 superne plicam conspicuam gerens. Margo externa simplex. 

 Axis circa yj, diameter y 1 ^ uncise. 



Exmouth, August 1850. 



I have just obtained fine specimens of this rare species, 

 first discovered by Mr. Walker at Sandwich, and rediscovered 

 by myself at Exmouth nearly thirty years ago. From an exa- 

 mination of my present acquisitions at this place, I am bound, 

 in justice to that naturalist's diagnosis, to confirm the state- 

 ment that his shell has a gw<m-reticulated aspect, resulting 

 from the close-set raised lines of increment, crossing the 

 spiral strise, though irregularly. Mr. Walker's phrase of " ele- 

 gantly reticulated" is not borne out, nor is the shell pellucid, 

 but sub-opake and frosted ; its texture and colour somewhat 

 resemble the Bullaa pruinosa. Some of the recent specimens 

 were taken alive ; but unfortunately, before they were detected, 

 the animals had become asphyxied beyond resuscitation by 

 immersion in their natural element. Notwithstanding these 

 discrepancies in Mr. Walker's and my specific characters, I 

 have scarcely a doubt of this being the species he meant to 

 designate, making due allowances for the lax and less precise 

 descriptions of his day. For instance, he says, the shell has 

 three volutions ; a cursory view would assign it that number ; 

 but the conchologists of that period, with the exception of the 

 accurate Montagu, were not aware that the apical turns in a 

 certain tribe of the minuter species were reflexed on the sub- 

 sequent one. Mr. Walker's specific characters are perhaps 

 insufficient for positive identification. At the time of the re- 



