Zoological Society. 307 



2 late sulcatis, striis spiralibus minutis, longitudinalibus minutis- 

 simis sculptis, colore nigra obscure minutis sime que griseo-lineato, 

 ultimo anfractu basi subplanato 4—5 sulcis profundis spiralibus 

 sculpto, margine obtusi subangulato, umbilico profunde perforata, 

 Icete aurantia, aperturd subrotundd, labro externa tenui, nigra 

 marginato, labra columellari albo 1—2-dentato, dentibus incequali- 

 bus munitis, dente inferiare minima, fauce albo-margaritaceo. 



Alt. Oy'o, lat. max. 1, alt. apert. 0^^ unc. 



Variat costis obliquis transversis. 



With the last 



Trochus (Margarita) purpuratus, sp. nov. 



T. testd turbinatd, spird depressd, prominuld, anfractibus 5, can- 

 vexiusculis, nitidis, lavigatis, striis incrementi minutissimis, ra- 

 seolis fasciis spiralibus Icete purpureis cinctis, suturis impressis, 

 basi margine subrotundato, umbilico imperfarato, albo, aperturd 

 subrotundd, labra externa tenui, labro interna Icevi, obsolete un- 

 dulato, aloa-margaritaceo, faucibus purpureo-margaritaceis. 



Alt. Oj-\, lat. max. Oy^, alt. apert. Oy^^ unc. 



A beautiful Httle species. W. coast of N. America? 



Trochus (Margarita) Hillii, sp. nov. 



T. testd late turbinatd, helicifarmi, spird obtusd, parvd, depressd, 

 anfractibus 5 convexiusculis, lavigatis, palitis, ad suturas appres- 

 sis, flaveo-albidis, ultimo anfractu maxima, basi convexo, margini- 

 bus rotundatis, centraliter excavato, imperfarato, aperturd oblique- 

 subrotundd, labro externa tenui, columellari leviter arcuata, albo ; 

 faucibus albo-margaritaceis. 



Alt. Oy^, lat. max. Oy'^-, alt. apert. Oy\ unc. 



From the northern shores of the W. coast of N. America ? 



I have dedicated this species to — Hill, Esq., Master of the 



* Herald.' 



Natica Pritchardi, sp. nov. 



N. testd subglobosd, spird brevi, anfractibus 5, nitidis, sub lente 

 striatis, flavealis, fasciis transversis fusca-purpureis, angulata- 

 undulutis Jiammulatis, in adulto obsaletis seufascias obscuras spi- 

 rales simulantibus ; aperturd ovatd, superne obsolete angulatd, co- 

 lumelld costd callosd albd spirali in umbilicum oblique intrante, 

 umbilico superne perforata ; faucibus fasciata-fuscatis. Operculo 

 calcareo, albo, Icevi, polita, sulco angustissimo prope margine ex- 

 terna, margine interna recto, crenulata. 

 Alt. 1 unc. ; long. anfr. ult. -j^g, lat. -^^ unc. ; long, apert. J^ unc. 

 Mazatlan. I have dedicated this pretty shell, which reminds us 

 of the Atlantic intricata, to my friend Dr. Pritchard, Assistant- 

 Surgeon of H.M.S. Calypso, who assiduously collected on the coast 

 of Mazatlan, where he, as well as the officers of the 'Herald' and 



* Pandora,' met with this species in abundance. 



Planaxis nigritella, sp. nov. 



N. testd ovato-lanceolatd , crassiusculd, fusco-nigridd, spird brevi, 

 acutd, anfractibus 6, spiraliter sulcatis, interstitiis latis, planis, 



20* 



