concava, nodulis acutis coronata ; albus, luteo tinctus, lineis et 

 maculis nigrescentibus reticulatus (f. 11, 12). — The depressed 

 spire and sharp coronal tubercles, with the dark and sharp reti- 

 culated markings, distinguish this shell from C. vidua on one side 

 and C. Nicobaricus on the other. 



10. arachnoideus, Gmel. — C. oblongus, lateribus paululum 

 inflatis, roseo tinctus, rubro-nigrescente minute reticulatim linea- 

 tus, medio plus minusve bifasciatus (f. 14) . — Minutely reticulated 

 with dark reddish lines. 



11. Peplum, Cliemn. — C. quam C. arachnoidev.s brevior, ma- 

 culis trigonis angulatis castaneis minute seriatim pictus; variat 

 bifasciatus (f. 13; f. 390). — A shorter shell than C. arachnoideus, 

 with close-set camp-like markings. The banded variety (f. 390) 

 assists the identification with Chemnitz's shell. 



12. zonatus, Bnuj. — C. oblongus, corona obtusa; spira brevi, 

 creruleo maculata et bifaseiata, nigro lineata (Plate II. f. 15). — 

 This species is distinguished by the regular cross-lines and the 

 tessellated bluish markings and bands between. 



13. albicans, Soiob. — C. oblongus, lateribus rectis, ad basin 

 augustus, albus, ad basin fusco tinctus, corona indistincta (f. 98). 

 — A small, straight-sided, white shell, tipped with brown. 



1 1. tenuis, Sowb. — C. oblongus, tenuis, albus, eaeruleo tinc- 

 tus, ad basin castaneo tinctus, ad angulum spira? et in medio cas- 

 taneo punctatus; spira elevata, nodulis moniliformibus coronata 

 (f. 314). • — -A light, thin, bluish-white shell, with bead-like crown, 

 and two rows of chestnut spots. 



15. Recluzianus, Bemliardi. — C. elongatus, tenuis, medio 

 subcontracts, ad basin subattenuatus, pallide luteus seu roseus, 

 maculis evanidis bifasciatim cinctus; spira acuta, leviter coronata 

 (f. 38, 39). — A light shell, with sharp angle and elegantly taper- 

 ing form. 



16. Caillandi, Kien. — C. solidus, oblongus, ad basin attenua- 

 tes; spira depressa, tuberculis paucis coronata, inter nodulos cas- 

 tanea; fulvus, lineis castaneis cinctus (f. 34). — The fiat top, 

 cross-lines, and attenuated form of this rare shell distinguish it 

 sufficiently from all others. 



17. Molluccensis, Chei/in. — C. solidus, subpyriformis, luteus, 

 castaneo maculatus, seriatim granulatus ; spira convexa, tuberculis 

 magnis coronata (f. 40). — A rather pyriform shell, with convex, 

 coronated spire, and granulated surface. 



