810 Mr. A. Adams on some new Mollusca. 
Eucharis Stimpsoni, A. Ad. 
E. testa subquadrato-elliptica, compressa, alba ; umbonibus parvis, 
acutis, antrorsum subinflexis ; valvis hispidis, concentrice rugoso- 
striatis, ab apice ad marginem posticum valde angulatis ; latere 
postico elongato, rotundato. 
Lat. 6 lin., alt. 4 lin. 
Hab. Inland Sea, Akasi. 
A transversely ovate species, with the beaks sharp and inflexed, 
and with the posterior area of the whorls strongly and acutely 
angulate. 
Leptoconchus rostratus, A. Ad. 
L. testa ovato-pyriformi, tenui; spira obtusa, alba, longitudinaliter 
lamellosa ; lamellis confertis, undulosis; apertura ovato-trigonali, 
antice in rostrum acutum desinente; labio levi; labro antice mar- 
gine sinuato; anfractu ultimo liris transversis instructo. 
Hab. Kino-O-Sima ; in Madrepores. 
This species differs from L. serratus, Riipp., in the lamellz 
not being serrulate; and from L. ellipticus, Sew., in the fore part 
of the last whorl being produced into an acute beak, and in its 
pyriform shape. ? 
Opalia exquisita, A. Ad. 
O. testa pyramidali, imperforata, acuminata; anfractibus 8, planatis, 
suturis canaliculatis ; varicibus permulltis, crassis, oblique punctato- 
striatis, ad angulum anfractuum aculeato-angulatis, interstitiis 
transversim liratis; basi carina cincta; apertura circulari, varice 
antice subangulato, postice acuminato. 
Hab. Gotto Islands; 71 fathoms. 
The only species at all resembling this is Scalaria porrecta, 
Hinds, from the Straits of Malacca. In the species described 
above, the varices are produced into sharp points at the sutures 
in a very elegant manner, and are obliquely striato-punctate, 
with the spaces between them conspicuously lirate. It belongs 
to the group with a basal ridge, and which has received the 
name of Opalia. 
Smaragdinella Sieboldi, A. Ad. 
S. testa ovato-oblonga, vix involuta, aperta, tenui, glauca, pellucida, dorso 
longitudinaliter striata; labio lamella spirali vix dilatata instructo. 
Hab. Takano-Sima; between tide-marks. 
This species differs remarkably from the other species of the 
genus in the breadth of the spiral lamella which winds round 
the inner lip. In S. viridis, S. glauca, and S. minor the lamella 
is so broad that it forms, when it winds, a cup-shaped appendage. 
In S. Sieboldi, however, the lamella is so narrow that a spiral 
ridge only is visible. 
a ee mes - 
ee eee ee ee ee ee i, 
