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



Patula (with teeth, Endodontd). 



6. Patula biplicata (Sowerhy). 



Hub. North of the island. Extinct. 



A small species with two palatal folds. Unknown to me. 



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



Var. UNiLAMELLATA. Apcrturc with the lower parietal lamella 

 wanting. 



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



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

 ^' Heliv" in 1S45, or one year after the jmblication of Sowerby's 

 description. As it cannot be regarded as generically distinct, 

 although 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 discoidea, superne planata, ad 

 peripheriam acute carinata, alia, superne et infra rufo 

 radiata ; anfractus 6, lente accrescentes, vix convexiusculi, 

 Jineis incrementi temiibiis striati, ultimtis acute carinatiis, 

 supra et infra carinam leviter co^npressus, antice hand 

 descendens, Jineis radiantibus rvfis undulatis ivfra pictiis, 

 radiatim tenuiter striatus ; apertura parva, subrliomboidalis, 

 lira parietali tenui intrante munita ; peristoma simplex, 

 teiiue, umbilicum versus leviter incrassatum . 

 Diam. maj. 12 millim., 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 Wollaston, whose 

 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, anguste umbilicata, albida, superne 

 maculis quadratis, inferne famnwlis rufs picta ; anfractus 

 6|, convexi, sutvra profunda discreti, radiatim tenuiter 

 costulati, ult/nius ad peripheriam rotundatvs, inferne striis 

 tenuissimis fexuosis sculptiis ; ajjertura lunata, obliqua, intits 

 denticulis incequalibiis sex {duobus lamellijormibus pa'rie- 

 talihus prominentibus, tribtis minimis supra columellam, una 

 ' ^ivoTTji, a deceiver. 



