223 



naliter corrugato-plicatis, transversim sulcatis, sulcis profundis, 

 valde distantibus ; interstitiis Icevibus ; aperturd oblongd, colu- 

 mella plica subproductd. 

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



strongly grooved transversely, and with the whorls longitudinally 



corrugately plicated. Mus. Cuming. 



4. MoNOPTYGMA LAUTA, A. Adams. M. testd turrito-subulatd, 

 albidd, tenui, subpellucidd, anfractibus planiusculis, longitudi- 

 naliter eleganter striatis, transversim sulcatis, sulcis distanti- 

 bus, interstitiis crenulatis ; aperturd oblongd, columelld obliqud 

 et curvatd. 



A very beautifnlly-sculptured species, dredged from 10 fathoms, 

 at Bolinao, by Mr. Cuming ; the outline is subulated, and the whorls 

 rather flattened and longitudinally striated. Mus. Cuming. 



5. MoNOPTYGMA AMCENA, A. Adams. M. testd ovato-acuminatd, 

 tenui, subpellucidd, albidd, longitudinaliter substriatd, anfrac- 

 tibus convexiusculis, transversim sulcatis, sulcis valde distanti- 

 bus, interstitiis eleganter punctatis ; aperturd oblongd, antice 

 dilatatd, columella rectd. 



This is a most exquisite species, both in form and sculpture ; the 

 whorls are rounded and punctate-striate, and the shell is nearly pel- 

 lucid; it is from Bolinao, 10 fathoms water. Mus. Cuming. 



6. MoNOPTYGMA CASTA, A. Adams. M. testd ovato-turritd, alba, 

 tenui, semipellucidd, anfractibus convexiusculis, transversim sul- 

 catis, sulcis subconfertis, interstitiis pulcherrime striatis ; aper- 

 turd oblongd, antice productd, columelld obliqud, subtortuosd. 



This pure white ovate form is from the China Seas, being collected 

 by the writer during the Voyage of H. M.S. Samarang. The whorls 

 are grooved, with the interstices striated. Mus. Cuming. 



7. MoNOPTYGMA SPECTOSA, A. Adams. M. testa turritd, subu- 

 latd, albidd, tenui, semipellucidd, anfractibus octo, convexius- 

 culis, suturd profunda, cingillis transversis elevatis, interstitiis 

 concinne cancellatis, ornatd; aperturd oblong o-ovali, columelld 

 subrectd, supernh plica obliqud subobsoletd instructd. 



Hab. Baclayon ; Philippines. Mus. Cuming. 



An elegant semipellucid species, resembling an elongated Actceon, 

 with the whorls encircled with elevated cingilli, and the interstices 

 cancellated. 



8. MoNOPTYGMA spiRATA, A. Adams. M. testd turritd, albd, 

 epidermide fusco tectd, anfractibus octo, planiusculis, gradatis, 

 suturd canaliculatd, plicis longitudinalibus, angustis, confertis, 

 et sulcis transversis decussatim ornatd; aperturd oblongd, labia 

 plied unicd obliqud instructo. 



Hab. Camaguin; Philippines. Mus. Cuming. 



A small turreted species, covered, in the hving state, with a light 

 brown epidermis, and with the surface regularly and beautifully de- 

 cussated with raised lines. 



