190 SILTQUARIA. 



S. TOSTUS, Mcircli. PI. 57, fig. 18. 



Small, rust color, darker brown at the apex ; tube narrow, 

 rather smooth, spire suborbicular ; fissure articulated, bordered 

 by a dentate line on either side. 



Ceylon. 



Differs (insufficiently) from the next species in the elliptical, 

 distant pores, the slit being bordered b}^ a narrow elevated 

 undulated line on both sides; so that except in the la-t whorl, 

 the slit seems situated on the top of a feeble carina. 



S. CuMiNGii, MiJrch. PI. 57, fig. 19 ; PI. 58, fig. 21. 



Whorls 5, the first scalariform, angulated behind, the angle 

 evanescent in the last whorl, grauularly lirate below, lirse distant, 

 the interstices with intervening lirulse, externally transversely 

 lightly fissured, the fissures evanescent in last whorl, umbilical 

 region longitudinally undulately striate, decussated by sigmoid, 

 distant radiating sulci ; slit at first closed, afterwards with open 

 round holes, which finally coalesce into a denticulated open slit. 



Philippines^ Japan. 



Morch describes Yars. rudis, conifer, platyomphala, lum- 



BRICALIS, L^VILIRATA, JaPONICA. 



S. Bernardit, Morch. PI. 58, fig. 22. 



White, clouded with fawn color, thin, elongated, narrowly 

 and loosely twisted, irregularly pyramidal towards the apex ; 

 tube narrow, crenulately striated, slit band roundly articulated. 



Australia. 

 S. ANGuiNA, Linn. PL 58, figs. 23-25. 



Shell rather thick, broadly irregularly twisted, distantly 

 spirally ridged, ridges sharply squamose or spined ; tube gener- 

 ally \Qxy slowly increasing ; spiral fissure very narrow, partly 

 consisting of oblong perforations, partly continuous and dentate 

 by the coalescence of these; white, j'ellowish or purplish, some- 

 times two colors on the same specimen. 



3Ioluccas, Ceylon. 



The synonj-ms are S. mu7'icata, Born., S. volvox, Dillw., S. 

 ruber, Schum., S. sulcata, Grraj'^, S. polygona, Blainv., S. Dunkeri, 

 Morch, S. squamata, Blainv. (fig. 25). In the latter form the 

 slit is simple and open, although othervvise the features are those 

 of anguina. This is not an error in the representation of the 



