TROCHIDiE, 313 



like Phasianella, but very pearly inside. T. lineatus, Lam. 

 (Ixxxi, 53). 



LESPERONiA, Touriiouer. Shell pearly, imperforate, elongate- 

 conical, whorls in the type carinated ; aperture entire, oblique, 

 pyriform ; peristome continuous, margined ; columellar margin 

 anteriorly expanded. Operculum (?). Distr. — Fossil. Oligi- 

 cene ; Dax. T. princeps, Tourn. (Ixxxi, 54). 



CANTHARiDUS, Moutfort. ( Cantharis, Fer. Cantharidium, 

 Montf.) Shell ovate, thin; outer lip acute ; the columella wants 

 the conspicuous tooth seen in Elenchus; the whorls are encircled 

 by striae and not polished ; interior highly iridescent. 6 sp. 

 Australia. T.iris^ Chemn. (Ixxxi, 55). 



FLEMiNGiA, dc Koninck, 1881. (Trochella, M'Coy.) Shell 

 thin, extended-conical, pointed; whoi'ls numerous, striate or 

 smooth, periphery usually angular; columella thin, slightly 

 extended, forming a point below. Sil. to Garb. F. Hisinger- 

 ianus, de Kon. 



BANKiviA, Beck. Shell subulate, with sharp spire, polished, 

 bright- colored ; whorls smooth, flattened, without epidermis; 

 aperture subovate, rather large, not nacreous within ; columella 

 twisted, truncated in front ; outer lip simple, sharp. Australasia. 

 T. varians, Beck (Ixxxi, 56). 



TROCHOCOCHLEA, Klein. (Osilinus, Phil. Labio, Gray. Mela- 

 graphia, Stentz.) Shell elevated, turbiniform, whorls bluntly 

 angled at the periphery, or with revolving caringe; outer lip thin, 

 smooth within ; inner lip spreading, twisted, dentate below ; no 

 umbilicus. 10 sp. Europe, W. Africa, Australia. T. multi- 

 carinatus (Ixxxi, 5*7^. 



GAZA, Watson. Shell trochiform, pearly ; margin of aperture 

 callously reflected ; columella mucronately angulated in front ; 

 umbilicus with nacreous callus. Operculum corneous, multi- 

 spiral. Distr. — T. dasdala, Watson. Fiji Is. 610 fathoms. 

 Related in general form to Trochocochlea, but strongly distin- 

 guished by its reflected lip. 



GALLOGAZA, Dall. Resembling Graza, but the umbilical callus 

 is only partly reflected over the umbilicus, the pillar is straight, 

 not mucronate, and the nacreous layer is overlaid by a thin, 

 porcellanous la^^er and a delicate epidermis. 2 sp. West 

 Indies. T. superba, Dall. 



MiCROGAZA, Dall. Shell flattened, rotelliform, resembling a 

 Gaza without reflected lip or umbilical callus, brilliantly nacreous 

 when fresh, and having a distinctly scalariform umbilicus. West 

 Indies. T. rotella^ Dall. 



MONODONTA, Lam. (Labio, Phil.) Shell oval or conoidal, not 

 umbilicated ; aperture rounded, angulated behind ; columella 

 arcuated, truncated at the base, and terminating in a tooth with 

 .channeled side; whorls with revolving riblets, which are usually 



21 



