OF CONCHOLOGY. 93 



ally, by its elongate and rather slender shape, also in the cha- 

 racter of its tubercles and its color. 



Pisania strigata, Pease. — Plate 11, fig. 6. 



Description. — T. elongato-fusiformi, transversim costata, costis 

 planiusculis, superne subangulatis, interstitiis sulcatis, trans- 

 versim interdurn striatis ; anfr. 7 — 8, plano-convexis, ultimo 

 prope labrurn, fortiter varicoso; labro vix crenato, intus lgevigato; 

 canali brevi, subrecurvo ; apertura longitudinis dimidium testae 

 baud sequans ; columella callosa, superne laminato-callosa ; cas- 

 taneo, alboque marmorata et fasciata, sulcis fuscis, apertura alba. 



Dimensions. — Long. 37, diam. 15. 



Hah. — Inel. Ponape. 



Shell fusiform, much elongate, transversely ribbed, ribs regu- 

 lar, depressed, plane and somewhat angulated on their upper 

 edge, separated by a groove, occasionally marked transversely 

 with a few elevated strise ; whorls seven or eight, planely convex, 

 the last with a prominent varix near edge of outer lip ; lip finely 

 crenate on its edge, smooth within ; canal short, very slightly 

 recurved ; aperture less than one-half the length of the shell ; 

 columella callous, and furnished with a small laminate callosity 

 above ; mottled and banded with dark chestnut brown and white, 

 grooves between the ribs dark brown, aperture white. 



Remarks. — The most beautiful species of the genus. Distantly 

 related to fasciolata, Rve., which species I have in my collection 

 from western Polynesia. 



Sistrum rugulosum, Pease. — Plate 11, fig. 7. 



Description. — T. ovata, utrinque acuta ; anfr. ultimo vix gib- 

 boso ; longitudinaliter costata, costis 9 — 10, rotundatis, trans- 

 versim costata, costis squamulosis, subnodulosis, interstitiis pro- 

 funde sulcatis ; anfr. ultimo superne angulato ; labro crenato ; 

 columella laevigata ; alba, apertura polita, alba. 



Dimensions. — Long. 8, diam. 5. 



Sab. — Insl. Howland. 



Shell ovate, acute at each end, longitudinally ribbed, ribs 9 — 

 10, rounded, transversely ribbed, ribs squamose, somewhat no- 

 dulose on longitudinal ribs, alternately smaller, interstices deeply 

 grooved ; last whorl somewhat gibbous and angulate above ; lip 

 crenate within on its edge ; columella smooth ; white, aperture 

 polished, white. 



