300 Zoological Society. 



Pleitrotoma Boholensis. Plenr. testa suhelongatd, temii, suh- 

 jjcllucidd, aJbidd, fulvo suhindistincte virgatd; anfractibns octo, 

 trunsversim lineatis et liratis, striis quoque subtilissime reticulatis ; 

 columelld spiralitcr tortuosd; canali brevissimo, jmululum recurvo ; 

 lahro simplici, acuta, sinu parvo. 

 Conch. Icon., Pleurotoma, pi. 13. f. 112. 



Hab. Island of Bohol, Philippines (found under stones on the reefs 

 at low water) ; Cuming. 



This shell, which is of a much thinner and slighter composition 

 than either of the two preceding ones, is very finely reticulated over 

 with striaa ; and it has a number of lines and ridges running trans- 

 versely across the whorls, but none longitudinally. 



Pleurotoma gracilenta. Pleur. testa gracillime fusiformi.fuhd, 

 anfractibus convexis, longitudinalitcr costellatis, costellis Icviter 

 nodulosis, striis elevatiusculis transversis deciissatis ; labro sub- 

 fiemioso, sinu lata ; canali breviusculo. 

 Conch. Icon., Pleurotoma, pi. 14. f. 114. 



Hab. Loay, island of Bohol, Philippines (dredged from sandy mud 

 at the depth of seventeen fathoms) ; Cuming. 



A shell of simple character, unlike any hitherto- described species, 

 though not presenting any \exy striking peculiarity. 



Pleurotoma pessulata. Pleur. testa siibacuto-fusiformi, fulvd 

 vel cinered, anfractibus leviter convexis, longitudinaliter costatis, 

 costis subdistantibus , striis transversis subobsoletis decussatis ; 

 labro tenui, sinu parvo ; canali breviusculo, subrecurvo. 

 Conch. Icon., Pleurotoma, pi, 14. f. 115. 



Hab. Bolinao, island of Luzon, Philippines (dredged from sandy 

 mud at the depth of ten fathoms) ; Cuming. 



Although the ribs in this species are comparatively distant from 

 each other, they vary considerably in this respect in different indi- 

 viduals ; the more elongated the shell, the closer the ribs, as shown 

 by the specimens figured. 



Pleurotoma contracta. Pleur. testa elongato-ovatd, albidd ; an- 

 fractibus piano -convexis, superne contraciis, costellis longitudina- 

 libus numerosis, striisque transversis elevatis eximie reticulatis; 

 sinu lato, canali brevi. 

 Conch. Icon., Pleurotoma, pi. 14. f. 116. 



Hab. Cagayan, province of Misamis, island of Mindanao, Philip- 

 pines (dredged from sandy mud at the depth of twenty-five fathoms) ; 

 Cuming. 



This species may be recognized by the peculiar contraction of the 

 whorls near the suture ; the sculpture is not much unlike that of the 

 C. gracilenta. 



Pleurotoma ceuo-nulli. Pleur. testd lanceolato-fusiformi, eximie 

 turritd, apice acuta ; griseo-albicante ; anfractibus in media vald^ 

 carinatis, carind compressd, pereleganter diadematd ; sinu ampla, 

 canali longissimo. 

 Conch. Icon., Pleurotoma, pi. 14. f. 117. 



Hab. Bay of Panama (found in sandy mud at the depth of ten 

 fathoms) ; Cuming. 



