Mr. A. Adams on new Mollusca from China and Japan. 135 



parietes, which commenced beneath the tentacles and passed 

 backwards. When dilated, it was seen that the animal was 

 destitute of a sucking disk, and that the posterior part of the 

 body terminated in a funnel-shaped depression opening into 

 the cavity of the body, and permitting ingress of water therein. 

 During contraction this funnel was everted, and became a cone, 

 through the apex of which the fluid was again ejected." 



XIII. — On some new Species of Mollusca from the North of China 

 and Japan. By Arthur Adams, F.L.S. &c. 



Genus Buccinum, Linnseus. 



Buccinum Japonicum, A. Adams. 



B testa ovato-fusiformi ; spira producta, laevigata, tenui, imperfo- 

 rata, epidermide corneo-fusca lougitudinaliter plicata et laminata, 

 transversim ad costas producta et fimbriata induta ; anfractibus 6k, 

 in medio angulatis, cingulis elevatis transversis acutis (circa 6 in 

 anfractu ultimo) instructis, interstitiis lineis elevatis longitudinali- 

 bus ornatis ; basi spiraliter lirata ; apertura ovata, antice breviter 

 et late canaliculata, canali emarginata ; labro margine incrassato et 

 reflexo. 



Hab. Okosiri ; Sea of Japan ; 35 fathoms. 



This is a beautiful little species of Buccinum proper, about an 

 inch in length, and with the epidermis, in fresh specimens, very 

 prettily disposed. Like most deep-water shells, it is very thin. 



Genus Trichotropis, Brod. & Sow. 

 Trichotropis (Iphinoe) quadricarinata , A. Adams. 

 T. testa turbinate, subconica ; spira elata, anguste umbilicata, fusca ; 

 anfractibus 4 h, spiratis, postice angulatis ; anfractibus superioribus 

 carinulis rotundatis transversis et liris elevatiusculis transversis, 

 lineis confertis elevatis obliquis undulatis decussatis ; anfractu ul- 

 timo carinulis transversis rotundatis quatuor, lineis elevatis longi- 

 tudinalibus decussato, basi concavo, lirulis tribus concentricis or- 

 nato ; apertura semicirculari, antice producta et vix canaliculata ; 

 labio rectiusculo ; labro margine biangulato. 



Hab. Mino-Sima; 63 fathoms. 



Genus Rissoa, Freminville. 



1. Rissoa miranda, A. Adams. 



R. testa pyramidato-ovata, turrita, imperforata, solida, sordide alba ; 

 anfractibus o\, convexis, longitudinaliter costatis, costis promi- 

 nentibus, distantibus, in medio nodosim angulatis, interstitiis 

 simplicibus, suturis zonula elevata instructis ; anfractu ultimo ad 



