258 MR. G. B. SOWERBY ON NEW SHELLS. [Apr. 28, 
neo fasciata, inter fascias fusco angulatim et undatim strigata, ad 
dorsum castaneo saturatiore et magis suffuso picta; spira elongata ; 
anfractibus 12 circa, quorum 7 apicalibus subrotundis longitudi- 
naliter costatis, spiraliter inter costas striatis, 3 ad 4 ultimis levi- 
bus, angulatis, ultimo in canalem caudalem attenuatum valide re- 
trorsus tortuosum terminante; columella laevigata, arcuata, labio 
albo, late expanso, alato, ad canalem anticum emarginato, prope 
canalem unilobato, inter lobum et alam sinu maximo emarginato, 
ala levigata, rectiuscula, incrassata, in lobum superne elevata, tum 
profunde emarginata, ad anfractum ultimum elevata. 
Hab. Ceylon. 
This very magnificent shell has at first sight the appearance of a 
gigantic S. vittatus, being similarly marked and of a similar general 
form. In that species, however, the whorls of the spire are sul- 
cated close to the suture, and the slightly winged outer lip is striated 
and bent inwards at the upper angle, showing nothing like the 
smooth broad-lobed wing seen in our S. mirabilis. Our shell is 
further characterized by a very large sinus, between the lower part 
of the wing and the terminal lobe of the outer lip next to the canal, 
which is curiously curved backwards. The specimen is now in the 
possession of Mr. G. B. Sowerby, jun. 
MITRA INTERSCULPTA. 
M. testa attenuata, alba, flammis longitudinalibus rubro-fuscis picta, 
costellis spiralibus angulatis basi crenulatis subdistantibus et liris 
minutis interstitialibus crenulatis cincta; ultimo anfractu oblongo ; 
spira breviuscula ; anfractibus 6, moderate conveais. 
Hab. Mauritius. 
Mus. Taylor. 
MIrTRA PRETEXTA. 
M. testa oblongo-ovata, equaliter liris longitudinalibus crebris et 
costellis spiralibus cancellata, albido-subc@rulea, zonis fuscatis 
tribus distantibus margine punctatis et maculis interstitialibus 
distantibus majoribus ornata, anfractu ultimo spiram longitudine 
equante ; spira producta ; anfractibus 10, conveais, prope suturam 
rotundis prominentibus ; apertura fumeo-fusca, intus lirata. 
Hab. 2 
Mus. Taylor. 

MirrA CORBICULA. 
M. testa breviuscula, turrita, costellis subrugosis spiralibus et liris 
irregularibus, frequenter duplicatis cancellata, albida seu pallide 
Sulvo-rubescente, ad angulum anfractuum distanter nigro ocellata, 
ad medium anfractus ultimi fascia frequenter bipunctata cincta, 
infra medium subirregulariter punctata ; spira elongata ; anfracti- 
bus angulatis, anfractu ultimo brevi. 
Hab. Mauritius. 
Mus. Taylor. 
This species resembles M. rugosa—a Tankervillian shell, believed 
