272 
5, convexiusculis, obtuse angulatis, subcanaliculatis, spiraliter 1— 
2 late sulcatis, striis spiralibus minutis, longitudinalibus minutis- 
simis sculptis, colore nigro obscure minutissiméque grisco-lineato, 
ultimo anfractu basi subplanato 4—5 sulcis profundis spiralibus 
sculpto, margine obtuse subangulato, umbilico profundeé perforato, 
lete aurantio, aperturd subrotundd, labro externo tenui, nigro 
marginato, labro columellari albo 1-2-dentato, dentibus inequali- 
bus munitis, dente inferiore minimo, fauce albo-margaritaceo. 
Alt. 0;',, lat. max. 1, alt. apert. 0-4, unc. 
Variat costis obliquis transversis. 
With the last 
Trocuus (MARGARITA) PURPURATUS, sp. Nov. 
(Pl. XI. fig. 11.) 
T. testd turbinatd, spird depressd, prominuld, anfractibus 5, con- 
vexiusculis, nitidis, levigatis, striis incrementi minutissimis, ro- 
seolis fasciis spiralibus lete purpureis cinctis, suturis impressis, 
basi margine subrotundato, umbilico imperforato, albo, aperturd 
subrotundd, labro externo tenui, labro interno levi, obsoleté un- 
dulato, albo-margaritaceo, faucibus purpureo-margaritaceis. 
Alt. 0545, lat. max. 0,5, alt. apert. 0,2, unc. 
A beautiful little species. W. coast of N. America? 
Trocavus (Marearita) Hitun, sp. nov. (Pl. XI. fig. 10.) 
T. testd late turbinatd, heliciformi, spird obtusd, parvd, depressd, 
anfractibus 5 convexiusculis, levigatis, politis, ad suturas appres- 
sis, flaveo-albidis, ultimo anfractu maximo, basi convero, margini- 
bus rotundatis, centraliter excavato, imperforato, apertura oblique- 
subrotundd, labro externo tenui, columellari leviter arcuato, albo ; 
Faucibus albo--margaritaceis. 
Alt. 045, lat. max. 055, alt. apert. 0,3; 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 PritcHarpt, sp. nov. (Pl. XI. fig. 2.) 
N. testé subglobosd, spird brevi, anfractibus 5, nitidis, sub lente 
striatis, flaveolis, fasciis transversis fusco-purpureis, angulato- 
undulatis flammulatis, in adulto obsoletis seu fascias obscuras spi- 
rales simulantibus ; aperturd ovatd, superné obsolete angulatd, co- 
lumelld costd callosd albd spirali in umbilicum oblique intrante, 
umbilico superne perforato ; faucibus fasciato-fuscatis. Operculo 
calcareo, albo, levi, polito, sulco angustissimo prope margine ex- 
terno, margine interno recto, crenulato. 
Alt. 1 une. ; long. anfr. ult. ,%, lat. $9 unc. ; long. apert. 58 une. 
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. 
Fig. 2 ¢. represents the young shell. 
