206 



NATICIDiE. 



Mahesensis, Recluz. 

 Malabarica, Recluz. 

 maroccana, Chem. 

 marochiensis, Becluz. 

 onca, Bolt. 

 orientalis, Gmel. 

 pallens, Phil. 

 papilionacea, Desk. 

 picta, Recluz. 

 pygmsea, Phil. 

 Rizzae, Phil. 

 rufa, Bor7i. 

 rufilabris, Recluz. 

 solida, Blainv. 



Souleytiana, Recluz. 

 spaclicea, Blainv. 

 stercus-muscarum, Chem. 

 tessellata, Phil. 

 Tournefortii, Recluz. 

 trifasciata, Recluz. 

 undata, Meusch. 

 unifasciata, Lam. 

 variolaria, Recluz. 

 vitellus, Linn. 

 vitlata, Gmel. 

 Zealandica, Quoij. 

 zebra, Chem. 

 zoualis, Recluz. 



Sub-gen. stigmaulax, Morch. 



Shell solid, subglobose, whorls rounded, sulcate or cancel- 

 lated ; umbilicus with a spiral funiculus. Operculum calcareous, 

 with several ridges on the outer surface. 



rugosa, Chem. 

 semisulcata, Gray. 



sulcata, Born. 



Genus LUNATIA, Lamarck. 



Animal entii'ely retractile within the shell. 



Operculum simj^le, cartilaginous. 



Shell oval, subglobose ; spire rather elevated ; aperture 

 semilunar; inner lip thin, or with a moderate callus ; um- 

 bilicus wide, pervious, not funiculate. 



Si/n. Natica, Risso, not Adans. 



Ex. L. monilifera, Lamarck, pi. 22, fig. 2. Oper- 

 culum, L. monilifera, fig. 2, a, 2, h. Shell, L. monilifera, 



fig- 2, c. 



In this genus the shells are usually covered with a dark 



