OF CONCHOLOGY. 67 



tatis; apertura parva, angusta, oblonga, vix obliqua; columella 

 subrecta, callo crasso marginata, ad basin uniplicata, superne 

 Isevis ; plumbeo grisea, infra suturas flavescenti cingulata et 

 rufescente fusca maculata ; basin fusca, albida aut flavescente 

 unifasciata ; columella aperturaque fusca ; interdum omnino 

 pallide grisea, aut cinerea, infra suturas maculata. 



Long. 26. Diam. 6 mill. 



Hab. Insl. Oahu. 



Shell acicular, smooth, glistening; whorls flattened, longitu- 

 dinally plicately ribbed, ribs straight, angulate ; interstices 

 punctured above; aperture small, narrow, oblong, slightly 

 oblique ; columella almost straight, bordered by a laminate cal- 

 losity connecting with outer lip, at base terminated by a fold, 

 smooth above ; color variable, generally of a leaden grey, encir- 

 cled beneath the suture by a yellowish band, which is spotted 

 with reddish brown ; base dark brown, last whorl encircled by a 

 pale yellowish or whitish band ; columella and aperture dark 

 brown ; sometimes the whorls are' wholly ash or grey color, 

 spotted and marked as above. 



In good condition, this species is a perfect gem. It approaches 

 nearest to varieties of T. strigillata, Linn. On examination, 

 however, it will be found to agree with that species only in the 

 arrangement of its colors. 



T. SULCATA, Pease. 



T. aciculari, nitida ; anfr. subangustis, infra suturas sulco 

 cingulatis, longitudinaliter plicato-costatis, interstitiis concavis, 

 profunde sulcatis, infra suturas striatis ; apertura oblonga an- 

 gusta; columella laevis, callo marginata, ad labium juncto; 

 cinereo grisea, infra suturas pallidior, interdum costis paflidis. 



Long. 15. Diam. 3 mill. 



Sab. Insl. Oahu. 



Shell acicular, shining ; whorls rather narrow, encircled below 

 the suture by a groove, longitudinally plicately ribbed, interstices 

 concave, deeply grooved transversely, below the suture striated 

 transversely; aperture oblong, narrow ; columella smooth, nearly 

 straight, bordered by a raised callosity, connecting with the 

 outer lip ; ashy grey, paler below the sutures, ribs occasionally 

 pale ash color. 



The above may prove to be a variety of T. Swainsonii, still 

 farther removed from the type than injlexa, Pease. 



T. ASSiMiLis, Pease. 



T. aciculari, nitida ; anfractibus l?evis, longitudinaliter angu- 



