817 



convex lateral outline, and strongly transversely grooved across 

 the flattened whorls. 



Philippines. (Mus. Cuming.) 



2. Monoptygma fulva (pi. clxxii, f. 23), A. Adams, Pro. 

 Zool. Soc. 1851. 



M. testa turrito-subulata, graciliori, solida, fulva ; anfractibus 

 planis, transversim sulcatis, sulcis profundis, distantibus ; apertura 

 oblonga, intus fusca. 



Turreted, subulate, slender, solid, fulvous; whorls flat, trans- 

 versely grooved, grooves deep, rather wide apart; aperture ob- 

 long, brown within. 



This species is more slender than M. striata, and of a different 

 colour; the transverse grooves are also much closer together, and 

 their edges are rounded; the twist of the columella is not so dis- 

 tinct, and the aperture is brown internally. 



Philippines. (Mus. Cuming.) 



3. MONOPTYGMA GRANULATA (pi. clxxii. f. 19), A. Adams, 



Pro. Zool. Soc. 1851. 



M. testa ovato-turrita, alba, solida ; anfractibus planiusculis, 

 gradatis, longitudinaliter corrugato-plicatis, transversim sulcatis, 

 sulcis profundis, valde distantibus, interstitiis lrevibus ; apertura 

 oblonga ; columella plica subproducta. 



Ovately turreted, white, sobd ; whorls rather flat, gradate, lon- 

 gitudinally corrugately plicate, transversely grooved, grooves deep, 

 very wide apart, interstices smooth ; aperture oblong ; columella 

 with the fold rather prominent. 



This is a rather short and obtuse, white, solid species, very 

 strongly grooved transversely, and with the whorls longitudinally 

 corrugately plicated. 



Philippines. (Mus. Cuming.) 



4. Monoptygma lauta (pi. clxxii. f. 20), A. Adams, Pro. 

 Zool. Soc. 1851. 



M. testa, turrito-subulata, albida, tenui, subpellucida ; anfracti- 

 bus planiusculis, longitudinaliter eleganter striatis, transversim 

 sulcatis, sulcis distantibus; apertura oblonga; columella obbema 

 et curvata. 



Subulately turreted, whitish, thin, rather pellucid ; whorls flat- 

 tened, longitudinally striated, transversely grooved, grooves wide 

 apart ; aperture oblong, columella oblique, curved. 



A very beautifully-sculptured species, dredged from ten fathoms, 



