392 



TURBININiE. 



Genus SENECTUS, Humphrey. 



Operculum without spiral ridges, externally convex 

 and granular. 



Shell turbinate, solid, axis usually perforate ; spire 

 elevated, whorls with transverse, granular, scaly, or spi- 

 nose ribs ; aperture ovate, longer than wide, produced 

 anteriorly ; columella narrow, rounded, circumscribed 

 by the umbilicus, the fore part produced into a broad, 

 channelled lobe. 



8i/n. Lunatica, Bolt. Batillus, Sckum, 



EoD. S. spinosus, Chemnitz, pi. 4.3, fig. 2. Oper- 

 culum, S. argyrostoma, Linnceus, fig. 2, a, 2, h. Shell, 

 S. chrysostoma, Linnceus, fig. 2, c. 



The " Snake Shells," as these species of Turho are 

 called, may be readily distinguished by their variegated 

 colours, ribbed whorls, and the peculiar character of 

 the inner lip. 



Species of Senectus. 



argyrostoma, Linn. 

 articulatus, Reeve. 

 Chemnitzianus, Reeve. 

 chrysostoma, Linn. 

 circularis. Reeve. 

 crassus. Gray. 

 crenulatus, Chem. 

 gemmatus. Reeve. 

 histrio. Reeve. 

 Japonicus, Reeve. 

 Lajonkairii, Desh. 

 laminiferus. Reeve. 

 margaritaceus, Linn. 

 nivosus, Reeve. 



Novse Zealaudiae, Chem. 

 pulcher, Reeve. 

 pustulatus, Reeve. 

 radiatus, Gmel. 

 setosus, Gmel. 

 sparverius, Gmel. 

 speciosus, Reeve. 

 Spenglerianus, Chem. 

 spinosus, Chem. 

 squamiger, Reeve. 

 Ticaoiiicus, Reeve. 

 trochoides, Reeve. 

 tumidulus, Reeve. 

 turcicus, Reeve. 



