68 AMERICAN JOUKKAL 



late pHcato-costatis, superne, interstitiis punctatis ; apertura 

 oblongo-ovata ; columella brevi, carinata, contorta ; fusca, infra 

 suturas grisea ; columella aperturaque fuscis. 



Long. 15. Diam. 3 mill. 



Hah. Insl. Oahu. 



Shell acicular, shining ; whorls flattened, smooth, longitudi- 

 nally angulately plicately ribbed, interstices punctured above ; 

 aperture oblong ovate ; columella short, keeled, twisted ; brown, 

 below the sutures greyish ; columella and aperture brown. 



Pleurotoma lirata, Pease. 



T. fusiformi, turrita, undique carinata, carinis subdistantibua, 

 subjequalis, carina in medio anfractuum paulo maxima, super- 

 ficiis intermediis concavis, carinarum interstitiis tenuite'r longi- 

 tudinaliter striatis ; sinu profundo ; canali brevi ; alba, carinis 

 rufescente fusco maculatis. 



Long. 35. Diam. 12 mill. 



Hah, Insl. Oahu. 



Shell fusiform, turrited, keeled all over, keels nearly of the 

 same size, and almost equidistant, the keel on the middle of the 

 whorls slightly the largest, the intermediate superfices concave, 

 interstices between the keels finely striate longitudinally ; sinus 

 deep ; canal short ; white, keels spotted with reddish brown. 



The above species may be distinguished by the regularity of 

 its keels. The spots are small, oblong, and confined to the edge 

 of the keels. 



Pleurotoma monilifera, Pease. 



T. gracile fusiformi, turrita ; anfractibus medio costa nodulosa 

 cingulatis, nodis lateraliter compressis, vix incisis, infra carina 

 parva marginatis ; medio inter costis nodulosis carina elevata 

 cingulata, interstitiis concavis, elevato striatis, longitudinaliter 

 tenuiter striatis ; cinereo-fusca, infra costam pallidior ; canali 

 elongate, recto ; sinu profundo. 



Long. 27. Diam. 8 mill. 



Hah. Insl. Oahu. 



Shell slenderly fusiform, turrited ; whorls encircled round 

 the middle by a nodulose rib, nodules compressed laterally and 

 slightly indented on their sides, bordered beneath by a small 

 smooth keel, and a more elevated one intermediate between the 

 nodose rib ; interstices concave, elevately striate transversely 

 and finely striate longitudinally ; canal long, straight ; sinus 

 deep ; ashy brown, lighter below the ribs, nodulose rib whitish. 



A beautiful species, when in good condition. 



