﻿S I [. I Q U A R I A. 



I'l.ATK 111. 



^|H', 



(Pig. .;. /), c rl, p, Mus. r5rlt. 



^^lr.RJ|;Al;I.\ akouina. Sil. ti'dd ple.rumque crassd, late 

 rl ii-rcijidariter contortd, didanter spiraliter liraid, 

 liria ticiitc nquajnatis vel cchinatis ; tubd j)lfrumijit.e 

 hnli: creacenti ; Jissurd npiraU anyuffi.<.'!inid in 

 p:irtibu!< Monyo-articul (ltd. 



TuK SNAKE Sir.iyuARiA. Shell geiu'rally thick, hroailly 

 and irregularly twisted, dititantly spirally ridged ; 

 ridges sharply sqnamose or spined ; tube gene- 

 rally very slowly increasing; spiral fissure very 

 narrow, with oblong articulations in parts. 



LiNT<«iis. Syst. Nat. [1. \-l\u. 



Sci-puhi murkala. Born. 



r.„.,.,,uhi amjuina, M5reli. 



Sihquiiria puhjijomi, Blainville. 



Siliquiiria rubur. Schumacher. 



SiliquariiL papilloma (?) llees. 



Siliyuaria Uvvigata, Lamarck. 



Siliquaria sulcata, Gi-ay. 



Serpidii ecldiinfii, Gmel. 



Hat. Moluccas, Cevlon. 



It is not without hesitation that the varieties in 

 I form and colouring represented in the plate are 

 united under one specific name. M. Miirch applies 

 I the name T. muneata to the pale yellow variety (fig. 

 I d), and that of T. ruhcr to the Ceylon purple, thick- 

 I shelled, fiat-whorled variety. We thought at first that 

 ' the specimen fig. e might represent a distinct species, 

 tlie tube and whorls being rounder and more regu- 

 larly increasing, and the ridges not being so strongly 

 ; developed. But having the yong specimen (fig. c) 

 before us, with the apical whorls purple and smooth, 

 and the lower pale and spinous, while in some parts 

 of the most rounded whorls the ridges could easil^- 

 be traced, we concluded that the union could be better 

 maintained than the separation. It is not difficult, 

 even with comparatively few specimens, to trace the 

 species through all its forms. The rounded and 

 angular, smooth and spinose, thick and slender, scales 

 without ridges and ridges without scales, the dark 

 purple, yellow, and white colours, the articulated, 

 closed, and simple slit are to be found within a few 

 specimens, and sometimes in a single one. 



