1863.] MR. A. ADAMS ON THE LIOTIIN^ OF JAPAN. 75 



Skenea, in the 'Annals' for 1860, the whorls are disunited, but the 

 volutions are not rolled on the same plane as in Daronia apirula. 



4. Genus Adeorbis, S. Wood. 



1. Adeorbis plana, A. Ad., Proc. Zool. Soc. 1850. 

 Hub. Gotto, 48 fathoms. 



2. Adeorbis clausa, A. Ad., Annals, 1861. 

 Hab. Tabu-Sima, 25 fathoms. 



3. Adeorbis orbella, A. Ad., Annals, 1861. 

 Hab. Mino-Sima. 



4. Adeorbis prominula, A. Ad., Annals, 1861. 

 Hab. Mino-Sima. 



5. Adeorbis depressa, A. Ad., Annals, 1861. 

 Hab. Mino-Sima. 



6. Adeorbis patruelis, A. Ad., Annals, 1861. 

 Hab. Mino-Sima. 



7. Adeorbis corniculum, A. Ad., Annals, 1861. 

 Hah. Mino-Sima. 



8. Adeorbis suturalis, A. Ad., Annals, 1861. 

 Hab. Tsu-Sima. 



9. Adeorbis japonica, A. Ad., Annals, 1861. 

 Hab. Gotto; Mino-Sima. 



10. Adeorbis nanula, A. Ad., Annals, 1861. 

 Hab. Mino-Sima. 



11. Adeorbis carinata, A. Ad. 



A. testa ovato-07'biculari, obliqua, depresso-conoidali, subdiaphana, 

 alba, late umbilicata; anfractibus concexiusculis, transversim 

 tenuiter striatis, rapide accrescentibus, ultimo antice dilatato, 

 ad peripheriam acute carina to ; apertura subtrigonali, antice 

 angulata et producta, mnbilico margine acuta. 

 Hab. Seto-Uchi ; Akasi. 



The keel at the periphery is marked and prominent, forming an 

 acute ledge round the last whorl. The only other species at all re- 

 sembling it is A. subcarinata, found in the British seaa. 



12. Adeorbis trochula, A. Ad. 



A. testa orbiculari, depresso-conoidea, profunde umbilicata, supra 

 convexa, infra plana, alba, semipellucida ; anfractibks f)\,pla- 

 niusculis, lente accrescentibus, suturis marginatis, anfractu 



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