Mr. A. Adams on new Molluscafrom Japan. 335 



8. Syrnola vitrea, A. Adams. 



S. testa acuminato-conoidea, alba, semipellucida, vitrea, nitida ; an- 

 fractibus 5, planulatis, linea angusta transversa rufescente in 

 medio ornatis, suturis exaratis ; apertura ovata ; plica parietali 

 valida, mediana, transversa ; labro intus trans versim sulcato. 



Hab. Mino-Sima ; 63 fathoms. 



9. Syrnola nitidula, A. Adams. 



S. testa subulatim conoidali, vitrea, nitida, semipellucida, suturis 

 profundis ; anfractibus 7h planulatis, laevibus, in medio fascia 

 rufa angusta transversa ornatis ; apertura subquadrata, antice 

 subacuminata ; plica parietali valida, mediana ; labro intus sulcato. 



Hab. Mino-Sima; 63 fathoms. 



Genus Styliferina, A. Adams. 



Testa imperforata, ovato-conica, tenuis, lsevis ; anfractibus multis, su- 

 premis in stylum productis, nucleo sinistrali. Apertura subqua- 

 drata, antice integra ; labio simplici, recto. 



The genus Entoconcha of J. Mtiller, which is parasitic on 

 Synapta, also has " the columellar margin straight ; " but the 

 form is described as being very different from Styliferina, there 

 being almost no spire, and the aperture being transverse and 

 semilunar. I have never seen a specimen of Entoconcha, which 

 is also said to be operculate. My shells were, unfortunately, in 

 the case of both the species, dredged dead, though perfect. I 

 examined dozens of the blue Asterince that came up with them, 

 but found no parasite, nor was I more fortunate with Spatangi 

 or Clypeasteres. 



1. Styliferina orthochila, A. Adams. 



S. testa imperforata, ovato-conica, pallide fusca, tenui, semiopaca ; 

 anfractibus normalibus 6, convexiusculis, leevibus, ultimo inflato ; 

 apertura subquadrata ; labio recto, antice in labrum continuo ; labro 

 arcuato. 



Hab. Tsu-Sima; 26 fathoms. 



This species was dredged from a bottom abounding in red 

 and blue Asterince, on which it may be parasitic. 



2. Styliferina goniochila, A. Adams. 



S. testa ovato-conica, imperforata, pellucida, vitrea, albida, tenui ; 

 anfractibus normalibus 5, convexiusculis, lsevibus, ultimo inflato ; 

 apertura subquadrata ; labio recto, antice in angulum productum 

 desinente ; labro arcuato. 



Hab. Mino-Sima; 63 fathoms. 



This species was dredged from a bottom containing large 



