Corns Cyproia. 215. 



press. While It seems to present a very faint affinity with 

 C. mus (Linnaeus) in the base, and columellar Hp, it is 

 very near 0. Thersites (Gaskoin) in all other respects. I have 

 carefully examined the unique C. marginata (Gaskoin), also 

 in the National Collection, and conclude it is the young form 

 of TJiersites or stercoraria, though, for convenience sake, I 

 have still kept it distinct in the accompanying list. 



C. caput serpentis (L.). The following is the description, 

 from Reeve., Conch. Icon., sp. 44. Cypr. testa subquadrato- 

 ovata, depressa, plana, crassa, solida, dorso, acuminato,. 

 dentibus conspicuis, subelongatis ; nigricante fusca, dorso 

 guttis niveis circularibus inaequalibus asperso, extremitatibus 

 albicantibus, dentibus, et apertura^ fauce fumeo-albidis. 

 Long, ij^ inch, Lat. i inch. Hab. Pacific Ocean, India, &c. 



C. caput angiiis (Phil.), 1849, in ZeitscJirift fiir JMalako- 

 Zoologie, p. 24. " C. testa oblongo- ovata, valde convexa,. 

 lateribus incrassatis angulatis ; basi convexa, nigro-fusca,, 

 in dorso alboguttata, extremitatibus albidis ; interstitiis den- 

 tium lacteorum aperturse fuscis. Long, ii^'"', Lat. 7^'"" 



" Coloribus omnino cum C. capite serpentis convenit, sed 

 maculae albae ad extremitates vix conspicuae, dentes aper- 

 turae in utroque labio, sedecim, lactei, sulcis fuscis divisi, 

 producti, incisura ad basin apertura^ lata, in sinistrum flexa, 

 quibus notis forma oblonga, lateribus longe minus dilatata 

 accedit." 



This species is said by Mr. Garrett, Mr. Brazier, and 

 Mr. G. F. Angas (all of whom have collected it plentifully, 

 the first at the Sandwich Isles, the others in Australia) to be 

 quite distinct, and to differ mainly from C. cap?it serpentis in 

 the smaller size, less dilation of the sides, and more obscure 

 marking. I apprehend all these specimens will be but 

 varieties of the commoner form, distinguished by their 

 greater convexity, and if this surmise be correct, the true 

 C. caput angitis of Philippi is a lost species. Anyhow the 

 shell is not known in this country, and I would appeal to 



