30 CRYPTOSPIRA. 



West Indian shells ; the full-grown shells from Panama being 

 precisely like the West Indian specimens figured (figs. 58-59). 



Section Cryptospira, Hinds. 

 Shell swollen, smooth, spire very short, nearly concealed ; 

 columella five- or six-plaited ; outer lip thickened, smooth within ; 

 color gray or yellowish olivaceous, usually without bands, 

 sometimes interruptedly banded or strigate. Nearly related 

 to Prunum, but differs in having a shorter spire, less callous 

 deposit and more cohimellar teeth or plaits. 



M. QUiNQUEPLicATA, Lam. PI. 9, figs. 63-66. 



Light olivaceous or slate-color ; lip and interior white or 

 tinged with yellow. Length, 1-1 "5 inches. 



Bay of Bengal, Malacca, Sumatra. 

 Var. Hainesii, Petit (fig. 66). 



Shell callously thickened throughout. 



M. encaustica, Reeve (fig. 65), is considered b}- Weinkauft" a 

 very young shell of M. quinqueplicata ; I think this verj' probable, 

 the additional columellar folds, and the numerous lip-denticula- 

 tions being probably evanescent juvenile characters. I am 

 helped to this conclusion by the fact that other juvenile forms 

 exhibit similar characters. 



M. ELEGANS, Gmelin. PI. 9, figs. 67-tO, 82 ; PI. 2, fig. 8. 



Gray, copiousl}?^ banded with dark iron-gray, the bands 

 composed of close longitudinal strigations ; lip and lower part 

 of columella orange-brown. Length, 1-1 '75 inches. 



Nicobar Is. ; Moluccas, 



With this species I unite as S3nion3'ms, M. atrigata, Dillwyn 

 (figs. 68, 69), a variety in which the strigations become undulated ; 

 M. Bu7-cha,rcli, Reeve (not Dunker) = 31. Loebbeckeana, Wein- 

 kauff (fig. 70) — a colorless variety, to which belong M. glauca 

 and M. MarcJii of Jousseaume. 



M. RUBENS, Martens. PI. 13, fig. 39. 



Shell ovate, corneous, margin of the lip pallid orange ; colu- 

 mellar plications three, parietal plications two. 



Length, 19 mill. 



E. Coast of Patagonia, ,60 fathoms. 

 Closely allied to M. glauca. Jousseaume. in form, but difiers in 



