222 



4. ScuTUS coRRUGATUs, Reeve. 



Parmophorus corrugatus. Reeve, Proc. Zool. Soc. 1842 ; Conch. 

 Syst. pi. 139. f. 1. 



Eab. ? Mus. Cuming. 



5. ScuTus TUMiDUS, Quoj et Gaimard. 



Parmophoriis tumidus, Quoy et Gaim. Voy. de I'Astrol. pi. 69. f. 6. 

 — Farm, gibbosus, Anton. — IParm. breviculus, Blainv. Bull, des Sci. 

 1817; Sowerby's Gen. (Emarg.) fig. 2. 



Hub. Madagascar. Mus. Cuming. 



6. ScuTus iMBRiCATUS, Quoy et Gaimard. 



Parmophorus hnbricatus, Quoy et Gaim. Voy. de I'Astrol. pi. (39. 

 f. 17, 18. 



Hab. Island of Burias. Mus. Cuming. 



7. ScuTus ANGUSTATUS, A. Adams. S. testd elongatd, subqua- 

 drangulari, lateribus angustatis, coarctatis ; dorso piano, con- 

 centrice striata, vertice subcentrali, postice declinato ; extremi- 

 tate anticd sinuatd, posticd excurvatd, subelevatd. 



Hab. Eastern Seas. Mus. Cuming. 



5. A Monograph of the genus Monoptygma of Lea. 

 By Arthur Adams, R.N., F.L.S. etc. 



Genus Monoptygma, J. Lea. (? Menestho, Miill.) 



Animal unknown. 



Shell subulately turreted, transversely striated, apex simple, acute ; 

 aperture oval, longer than wide, rounded and entire in front ; colu- 

 mella with a single oblique fold. 



This genus differs from Actaon in being elongated, and in having 

 an oblique fold, instead of a transverse plait on the columella. 



1 . Monoptygma striata. Gray. M. testd turrito-subulatd, so- 

 lidd, olivaced, anfractibus planis, transversim sulcatis, sulcis 

 profundis, distantibus ; aperturd oblongd, intus albd. 



This species, which is typical, is a very thick and strong shell, with 

 a somewhat convex lateral outline, and strongly transversely grooved 

 across the flattened whorls. Mus. Cuming. 



2. Monoptygma fulva, A. Adams. M. testd turrito-subulatd, 

 graciliori, solidd, fulvd, anfractibus planis, transversim sulcatis, 

 sidcis profundis, distantibus; aperturd oblongd, intus fused. 



This elegantly-formed shell 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 distinct, and the aperture is brown internally. Mus. Cuming. 



3. Monoptygma granulata, A. Adams. M. testd ovato-tur- 

 ritd, albd, solidd, anfractibus planiusculis, gradatis, longitudi- 



