1862.] MARINE SHELLS FROM THE PACIFIC ISLANDS. 279 



the margin. The dorsal ridges are also less in number, and in 

 some specimens altogether wanting. 



CONUS PURUS. 



T. turbinata, superne suhrotunda, subtilissime transmrsim et Ion,' 

 gitudinaliter elevatim striata ; spii'a vix concava, spii'aliter 

 striata ; apertura lata ; omnino alba, epidermide tenui lutes- 

 cente induta. 

 Shell turbinated, somewhat rounded at upper part, marked with 

 very fine, unequal, transverse, and longitudinal raised striae, the 

 former the most distinct ; spire very slightly concave, spirally stri- 

 ated ; aperture broad ; wholly white, covered with a thin, yellowish, 

 membranaceous epidermis. 

 Length 40, breadth 21 mill, 



Drillia nodulosa. 



T. pyramidali-oblonga ; anfraefibus 8, superne depressis, longitw- 

 dinaliter nodoso-costatis, costis undecim, anfr. ultimo infra 

 tuberculosis nodis cingulato ; apertura ampla, sinu rotundato, 

 profunda ; canali brevi, latG ; ryfescenti-fusca, costis et colu' 

 mella ad ba^in albidis. 

 Shell pyramidally oblong ; whorls eight, concavely depressed above, 

 longitudinally nodosely ribbed, ribs about ten ; body-whorl encir- 

 ■cled by a row of tuberculous nodules, in continuation of the longitu- 

 dinal ribs ; aperture open, sinus round and deep ; canal short, wide. 

 Colour reddish brown; ribs and base of columella whitish. 

 Length 1 1, breadth 4f milL 



Anachis costellifera. 



T. oblongo-ovata, longitudinuliter costata, costis conferfis com- 

 presso-rotundatis, infra suturas subconstrictis ; anfr. 5, plano- 

 convexis, anfr. ultimo inferne transversim striato ; apertura 

 ampla, sinu prof undo, basi subtruncato, canali brevissimo ; costis 

 griseo-albicantibus, interstitiis interdum rufescenti-fuscis^ anfr, 

 ultimo rufescenti-fuscQ semibalteato aut irregulariter picto. 

 Shell oblong-ovate, longitudinally ribbed ; ribs about twenty, close, 

 compressedly rounded, extending the whole length of the whorls, very 

 slightly constricted beneath the sutures ; whorls five, plano-convex ; 

 aperture rather wide ^ sinus open, on the central third of the lip ; 

 base subtruncate ; canal very short ; ribs greyish white ; interstices 

 sometimes reddish brown ; last whorl partially banded or irregularly 

 painted with reddish brown. 

 Length 5, breadth 2 mill. 



SiPHONARIA DEPRESSA. 



T. ovata vel oblongo-ovata, depressa, tenuiuscula, subirregulari, 

 radiatim costata et lirata, costis paucis, prominentibus, con- 

 centrice obsolete striata, apice subuncinato^ siphone conspicuo ; 

 nigricans, intus nigra. 



