gibbons: on land shells of curacao. 135 



NOTES ON SOME OF THE LAND SHELLS OF 

 CURACAO, W.L ; 



WITH DESCRIPTIONS OF TWO NEW SPECIES. 

 By J. S. GIBBONS, M.B. 



Cionella Gioynii, sp. nov. (PL I, fig. i). 



Testa anguste subcylindrica, elofigata, tenuis, siibdiaphana, hiteo- 

 cornea, sti'iata ; anfr. Q-io, pla7iulati, quatuo)- sz^periores 

 crescentcs, ultimus fnaxi?nus, alii ceqnales : sutura angtista, 

 distincta ; apertura ovata, siiperne angusta, angidata, basi 

 rotundata : labiicni externum tenue rotundatum : columella 

 lente callosa, arciiata, truncata,cum la?nind ieniii post medium. 



Long. I J mill., diam. j mill. 



Shell subcylindrical, elongate, narrow, rather thin, semitrans- 

 parent, dull yellowish-horn color, closely and rather coarsely 

 striate by lines of growth ; epidermis thin and distinct ; whorls 

 9-10, flattened, the first 4 gradually increasing — the bodj^-whorl 

 rather the longest, the middle turns equal in size ; spire shortly 

 pointed ; suture narrow, well marked ; aperture ovate, rounded 

 in fi-ont, narrow and angulate behind, outer lip thin and direct, 

 gently curved, columella somewhat callous, arched with a sharper 

 curve, ending abruptly a little behind anterior end of aperture ; a 

 thin lamina winds spirally down axis of shell, appearing in the 

 aperture as a low thin tooth, situated rather behind the middle of 

 the columella. 



Animal pale grey, tentacles darker grey. 



St Ann's. Under stones ; numerous. 



