262 MR. E. A. SMITH ON THE [Apr. 5, 



Patula (with teeth, Endodontd). 



6. Patula bipltcata (Sowerby). 



Hab. North of the island. Extinct. 



x\ small species with two palatal folds. Unknown to me. 



7. Patula bilamellata (Sowerby). (Plate XXI. fig. 5.) 

 Var. unilamellata. Aperture with the lower parietal lamella 



wanting. 



Hab. Sugarloaf Ridge, rare {Turton). Extinct. 



This name was also applied by Pfeiffer to a small species of 

 '■'Helix" in 184.5, or one year after the publication of Sowerby's 

 description. As it cannot be regarded as generically distinct, 

 althoiigh very different in form, I propose to substitute the name 

 Patula pagodiformis. 



8. Patula vernoni, sp. nov. (Plate XXI. figs. 6-6 b.) 



Testa anguste perforata, depresse diseoidea, siiperne planata, ad 

 periplieriam acute carinata, alba, siiperne et infra rufo 

 radiata ; anfractus 6, lente accrescentes, vice convexiuscuU, 

 lineis incrementi tenuibus striati, ultimtcs acute carinattis, 

 supra et infra carinam leviter compiressus, antice liaud 

 descendens, lineis radiantibus rvfs undulatis infra pictus, 

 radiatim tenuiter striatus ; apertura parva, stibrhomboidalis, 

 lira parietali tenui intrante munita ; peristoma simplex, 

 tenue, umbilicum versus leviter incrassatum. 

 Diam. maj. 12 onillim., min. 11, alt. 4. 

 Hab. Side Path {Turton). Extinct. 



This species is at once recognized by its very flat spire, the com- 

 pressed very acute keel, the minute umbilicus, the single fine lira- 

 tion upon the upper part of the body-whorl, running within the 

 aperture, and the style of colouring. The red rays upon both the 

 upper and lower surfaces are more or less wavy and interrupted. 

 There is no other sculpture excepting the fine lines of growth which 

 cross the upper surface of the whorls obliquely and are a little flexuous 

 beneath. The body-whorl has a more distinct impression below the 

 keel than above it. I have much pleasure in naming this very 

 distinct species after my late friend T. Vernon WoUaston, w^hose 

 work ' Testacea Atlantica ' is one of the most accurate and complete 

 hitherto published upon any Molluscan fauna. 



9. Patula pseustes, sp. nov.^ (Plate XXI. figs. 7-7 b.) 



Testa conoidea, pyramidalis, angtiste umbilicata, albida, superne 

 onactilis qiiadratis, inferne fammvlis rtifis picta ; anfractus 

 6g, convecci, siiiura profunda discreti, radiatim tenuiter 

 costulati, vltinnis ad periplieriam rotundatvs, inferne striis 

 teoiuissimis flexuosis sculpiiis ; apertura Imiata, ubliqua, intus 

 denticulis incequalibzis sex {duobus lamellijormibus parie- 

 talihus prominentibus, tribtis minimis supra columellam, una 

 ^ ipivrrrrjs, a deceiver. 



