308 Zoological Society. 



sulcis in medio anfractus ultimi ohsoletis, aperturd ovatd, patuld, 

 superni unidentatd, labro externa tenui, margine interna obsolete 

 crenulato, labro columellari, superne striata, in/erni abbreviate, 

 Icevi; canali brevissimci, faucibus atropurpureis. 



Long, -j^, lat. -j^, long, apert. -^unc. 



Straits of Juan del Fuaco. The operculum is preserved in some 

 of the numerous specimens, and has a subspiral nucleus. 



Planaxis pigra, sp. nov. 



N. testd ovato-lanceolatd, crassd, flaveold, spird. mediocri, acutd, 

 anfractibus 6, planatis, Icevigatis, aperturd brev'i-ovatd, patuld, 

 superne obsolete unidentatd, labris incrassatis, marginibus leevibus, 

 canali brevissimd, faucibus albis. 



Long. y\, lat. ^, long, apert, ^^ unc. 



Its surface is invested with a soft yellow epidermis. The operculum 

 is corneous, of subconcentric elements, with a lateral subspiral 

 nucleus. 



Pitcairn's Island. 



Nassa Cooperi, sp. nov. 



N. testd lanccolatd, turritd, crassd, anfractibus 6, convexiusculis, 

 spiraliter sulcato-striaiis, longitudinaliter 8-costatd ; coslis di- 

 stantibus, fortibus, distinctis ; anfractu ultimo \ longitudinis testa 

 (equante, aperturd ovatd, canali brevi ; labro externa crasso, sim- 

 plici ; labro columellari reflexo, albo ; caudd albd; anfractibus 

 fuscis, obscure albo-fasciatis . 



Long. y\- unc, lat. anfr. ult. -/^-j ^o^g* apert. y^. 



Marked from the Sandwich Isles. Dedicated to Lieut. Cooper, 

 R.N., of the ' Herald.' 



Nassa Woodwardi, sp. nov. 

 N. testd lanceolatd, turritd, crassd, albd, rufo-fasciatd, anfracti- 

 bus sex convexiusculis, spiraliter sulcatis, longitudinaliter dense- 

 costatis, spird vix longitudinem ultimi anfractds tequante ; aper- 

 turd ovatd, Cauda brevissimd; labro columellari reflexd, albd; 

 caudd albd ; fauce striata. 

 Long. ^ unc. ; lat. -^^ unc. ; long, apert. -^ unc. 

 With the last. Dedicated to -- Woodward, Esq., R.N., Purser 

 to the ' Herald.' 



Purpura analoga, sp. nov. 



P. testd turritd, albidd, spiraliter latl rufo-fasciatd ; spird exsertd ; 

 anfractibus 5 rotundatis, costis spiralibus (6 ad 8 in anfractu 

 penult imo), quadratis, numerosis cinctis, interstitiis crenulatis, ad 

 suturam obsoletis, labro subdenticulato. 

 Long. 1^, lat. ^, long, apert. -^ unc. 



This species (from the Californian coast ?) bears a striking resem- 

 blance to the Atlantic Purpura lapilliis, and is intermediate between 

 it and the Purpura decemcostata of MiddendorflF, from the Icy Sea at 

 Behring's Straits, the place of which it probably takes on the western 

 shores of North America. 



Purpura, nov, sp. ? A single specimen, to which I abstain giving 

 a name, since its characters are intermediate between those of de- 



