273 
Planaxis nigritella, sp. nov. (PL XI. fig. 6.) 
P. testd ovato-lanceolatd, crassiusculd, fusco-nigrida, spird brevi, 
acutd, anfractibus 6, spiraliter sulcatis, interstitiis latis, plcinis, 
sulcis in medio anfractus ultimi obsoletis, aperturd ovatd, patuld, 
superne unidentatd, labro externo tenui, margine interno obsolete 
crenulato, labro columellari, superne striato, inferne abbreviato, 
Icevi; canali brevissima, faucibus atropurpureis . 
Long. -Y 2 , lat. , long, apert. unc. 
Straits of Juan del Fuaco. The operculum is preserved in some 
of the numerous specimens, and has a subspiral nucleus (see fig. 6 a). 
Planaxis pigra, sp. nov. (PI. XI. fig. 5.) 
P. testd ovato-lanceolatd, crassa, flaveold, spird mediocri, acutd , 
anfractibus 6, planatis, leevigatis, aperturd breve-ovatd, patuld, 
superne obsolete unidentatd, labris incrassatis, marginibus Icevibus, 
canali brevissima, faucibus albis. 
Fong, 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. (PI. XI. fig. 4.) 
N. testd lanceolata, turrita, crassa, anfractibus 6, convexiusculis, 
spiraliter sulcato-striatis, longitudinaliter 8-costata ; costis di- 
stantibus, fortibus, distinctis ; anfractu ultimo \ longitudinis testce 
iequante , aperturd ovatd, canali brevi; labro externo crasso, sim- 
plici; labro columellari reflexo, albo; caudd alba; anfractibus 
fuscis, obscure albo-fasciatis. 
Long, unc., lat. anfr. ult. long, apert. 
Marked from the Sandwich Isles. Dedicated to Lieut. Cooper, 
R.N., of the ( Herald.’ 
Nassa Woodwardi, sp. nov. (PI. XI. fig. 3.) 
N. testd lanceolata, turrita, crassa, alba, rufo-fasciatd, anfracti¬ 
bus sex convexiusculis, spiraliter sulcatis, longitudinaliter dense- 
costatis, spird vix longitudinem ultimi anfractus cequante; aper¬ 
turd ovatd, caudd brevissima; labro columellari reflexd, albd; 
caudd albd; fauce striato. 
Long. nnc.; lat. unc.; long, apert. unc. 
With the last. Dedicated to — Woodward, Esq., R.N., Purser 
to the ( Herald.’ 
Purpura analoga, sp. nov. (PI. XI. fig. 12.) 
P. testd turritd, albidd, spiraliter late rufo-fasciatd; spird exsertd; 
anfractibus 5 rotundatis, costis spiralibus (6 ad 8 in anfractu 
penultimo), quadratis, numerosis cinctis, interstitiis crenulatis, ad 
suturam obsoletis, labro subdenticulato. 
Long. lyL, lat. -^ 2 , long, apert. unc. 
This species (from the Californian coast ?) bears a striking resem¬ 
blance to the Atlantic Purpura lapillus, and is intermediate between 
No. CCXYIII.— Proceedings of the Zoological Society. 
