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to ils enviroiiment. Speaking generally, tlie sraall solid 

 examples, which olten approacli very closely to C. varians, 

 Sby., are met wilh at exposed positions on the reefs, 

 while at and below low water mark in sheltered situations 

 (particulary on muddy ground), the shells attain a very 

 large size and are quite thin in texture. 



C. varians, Sby. This miniature représentation of C. 

 verskolor may possibly even prove to be but a variety of 

 the latter species. I hâve not seen C. varians alive and 

 know little of its habits, but the varieties largeJy appear 

 to be constant local forms. 



C. Soiiverbiel, Crosse. Almost certainly but a variety of 

 C. varians, Sby. 



C. pœcila, Sby. In a large séries it appears quite 

 impossible to difïereutiate this satisfactorily from C. 

 varians, Sby. Such différences as exist belween typical 

 examples areprobably due to environment. 



C. amirantium, Sm. This charmiug little form in many 

 features approaches the V. troglodytes group. It is a well 

 marked species which cannot be mistaken for any other. 



C. scalpta, Rve. (i. e., C. Digglesi, Braz.) The shells 

 recorded by Hervier should be referred to C. Digglesi, Bra'z. 

 Reeve's species of which the type-specimen in the British 

 Muséum seems to be the only example known, is a very 

 remarkable form and appears to be quite unlike any other 

 with which 1 am acquainted. The shell is an exceedingly 

 solid one, aud the fulgurations are not mère colour 

 markings, as in C. Digglesi, but are prominent raised 

 ridges. C. Digglesi does not belong to the (L versicolor 

 group, but should be associated rather with C. troglodytes, 

 Souv. I hâve collected a large séries of this species in 

 Torres Straits ; where it varies withiu very wide limits. 

 It may be ovate or lauceolate in shape, strongly costale or 

 quite smooth, and even the very characteristic fulgurated 

 markings are sometimes obsolète. 



