380 



NERITIDyE. 



ornata, Sow. 

 Papuana, Recluz. 

 peloroiita, Linn. 

 plicata, Linn. 

 scabricosta, Lam. 

 Selot, Adanson. 



striata, Martyn. 

 trifasciata, Le Guillou. 

 uiidulata, Gmel. 

 variegata, Chem. 

 venusta, Dkr. 

 Winteri, Phil. 



Sub-gen. theliostyla, Morch. 

 Septiform plane of inner lip granular or tubercular. 



albicella, Linn. 

 anthracina, F. d. Busch. 

 Argus, Tiecluz. 

 atrata, Chem. 

 Bernliardi, Recluz. 

 bizonalis, Lam. 

 Charufeleon, Linn. 

 chlorostoma, Lam. 

 diversicolor, Martyn. 

 Dombeji, Becluz. 

 Dumar, Adanson. 

 exuvia, Linn. 

 fulgurans, Gmel. 

 Largillierti, PhiL 

 Longii, Recluz. 



marginata, Gmel. 

 morio, Sow. 

 nigerrima, Chem. 

 ocellata, Le Guillou. 

 oryzarum, Recluz. 

 petechialis, Meusch. 

 picea, Recluz. 

 plauospira, Anton. 

 plexa, Chem. 

 reticulata, Karsten. 

 squammulata, Le Guillou. 

 Tadin, Adanson. 

 varia, Meusch. 

 Yoldii, Recluz. 



Genus NERITELLA, Humphrey. 



Operculum testaceous, the outer surface smooth, with 

 two apophyses, the upper shorter, sometimes dilated 

 and crested, the lateral in the form of an arched rib. 



Shell globose, oval, turriculated or conical, thin, often 

 depressed, covered with a horny epidermis ; aperture 

 semilunar; inner lip straight, flattened, the margin 

 smooth or denticulated ; outer lip simple internally. 



