Mr. A. Adams on new Mollusca from 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 transversim sulcato. 
Hab. Mino-Sima; 63 fathoms. 
9. Syrnola nitidula, A. Adams. 
S. testa subulatim conoidali, vitrea, nitida, semipellucida, suturis 
profundis ; anfractibus 73, planulatis, levibus, in medio fascia 
rufa angusta transversa ornatis; apertura subquadrata, antice 
subacuminata ; plica parietali valida, mediana ; labro intus sulcato. 
Hab. Mino-Sima; 63 fathoms. 
Genus Stytrrerina, A. Adams. 
Testa imperforata, ovato-conica, tenuis, leevis ; anfractibus multis, su- 
premis in stylum productis, nucleo sinistrali. Apertura subqua- 
drata, antice integra; labio simplici, recto. 
The genus Entoconcha of J. Miiller, 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 Asterine 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, levibus, 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 Asterine, on which it may be parasitic. 
2. Styliferina goniochila, A. Adams. 
S. testa ovato-conica, imperforata, pellucida, vitrea, albida, tenui; 
anfractibus normalibus 5, convexiusculis, levibus, 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 
