new Species c)/'Pleurotomid«. 325 



The liration which encirclps tlie whorls at the angulation 

 is a little stouter than the rest, and on crossing the ribs is 

 slightly thickened. The very fine strijB are minutely granu- 

 lous, but this character can be seen only by the aid. of a 

 compound microscope. 



Pleurotoma [(Jlathurella) graniclaiJirata. 



Testa elongato-ovata, coruea ; anfractus 7 ? (apice fracto) reliqui 4 

 leviter convexi, superne juxta suturani carina parva cincti, ubique 

 costis leviter obliquis teiiuibus circiter 16 et liris spiralibus pau- 

 lulum tenuioribus (in anfr. peuultimo 5, m ultimo ad 16) supra 

 costis granosis, pulcherrime clathrati ; apertura angusta, loiigit, 

 totius ad \ asquans ; labrum fuscescens, paululum pone marginem 

 acutum, costa ultima quam caetera? maxime validiori incrassatum, 

 aliquanto infra suturam sinu subamentiformi ornatum ; canalis 

 subbrevis, augustus. 



Long. 6 mill., diam. 2. 



Hah. Jamaica. 



The chief distinctive characteristics of this species are the 

 fine granose reticulation and the small keel winding round 

 the top of the whorls contiguous with the suture. 



Pleurotoma {JDa'phnellal) arcta. 



Testa anguste ovato-fusiformis, albida, interdum infra suturam rufo 

 sparsim notata ; anfract. 7-8, primi 2 lajves, tertius confertim 

 granulatus, cteteri minime convexi, costis rectis parum elevatis 

 (in anfr. penultimo circiter 15, in ult. ad 18) insti'ucti, et liris 

 spiralibus insequalibus cincti, sutura leviter marginata discreti ; 

 apertura angusta, longit. totius ^ vix sequans ; columella tor- 

 tuosa ; labrum incrassatum, superne modice sinuatum ; canalis 

 brevissimus, angustus. 



Long. 7 mill., diam. 2. 



Hah. Japan and Persian Gulf. 



The great peculiarity of this species is its narrow form. 

 The coloration appears to be variable. The ordinary colour is 

 wholly whitish, but some specimens have a reddish dot here 

 and there below the suture and near the middle of the body- 

 whorl ; and again another example is entirely of a pale red- 

 dish hue. The third whorl is closely longitudinally and 

 spirally sulcated, thus giving it a granulous aspect. 



Bela anipla. 



Testa ovata, leviter turrita, sub epidermide lutescenti albida vel 

 pallide lilacca ; anfractus 6, convex iusculi, longitudinaliter tenu- 

 iter confertim plicati (pHcis in anfr. ultimo ad medium evanidis) 

 transveririm ubique tenuiter sulcati, iucrementique lineis striati ; 



