Zoological Society. 301 



Pleurotoma crassilabrum. Pleur. testa ovato-turritd, flavicante 

 fusco cceruleoque varie zonatd ; anfractibus convexis, supcrne Icc- 

 vibus, infra tuberciilato-costatis, costis striis transversis elevatius- 

 cutis decussatis ; aperlurd brevi, subrotiindatd ; canali brevi, sub- 

 tortuoso ; labro valdl- incrassato, varicoso, intiis acuta, sinu rotun- 

 dato. 



Conch. Icon., Pleurotoma, jjI. 14. f. 118 A & c. 



Hab. Island of Ticao, Philippines (found on the reefs) ; Cuming. 



^^ar. p. Testa incolorata, striis transversis fere obsoletis. 



Conch. Icon., Pleurotoma, pi. 14. f. 118 «. 



Hab. Island of Masbate, Philippines (dredged from sandy mud at 

 the depth of seven fathoms) ; Cuming. 



The blue and brown colouring of the first variety is very conspi- 

 cuous between the ribs. The var. /3, which is colourless, seems to 

 have a thin epidermis upon it. 



Pleurotoma Hixdsii. Pleur. testd ovatd, subinjlatd, aJbldd,fus- 

 cescente pallide variegatd ; anfractibus costis duabus, ultimo costis 

 quatuor, distantibus, cingulatis, cost ell is numerosis, compressis, 

 eximie cancellaiis ; aperturd ovatd ; canali brevi. 



Conch. Icon., Pleurotoma, pi. 14. f. 119. 



Hab. Baclayon, island of Bohol, PhiHppines (found under stones 

 on the reefs at low water) ; Cuming. 



Pleurotoma lactea. Pleur. testd ovato-oblongd, tenui, subinjlatd, 

 lacted, costis carinisve rotundat is striisque exilibus cinctd ; labro 

 simplici, acuto ; sinu parvo ; aperturd ovatd, canali brevissimo. 



Conch. Icon., Pleurotoma, pi. 15. f. 123. 



Hab. Bolinao, island of Luzon, and Gindulman, island of Bohol, 

 Philippines (found under stones at low water) ; Cuming. 



Pleurotoma brevicaudata. Pleur. testd abbreviate -fusiformi, 

 solidd, lutcold, apice basique fuscescentibus ; anfractibus convexis, 

 superne unicarinatis, infrti bicarinatis, anfractu ultimo multicari- 

 nato ; labro simplici, acuto ; sinu amplo ; aperturd parvd, brevi, 

 canali breviusculo. 



Conch. Icon., Pleurotoma, pi. 15. f. 126. 



Hab. Island of Ticao (found on the reefs) ; Cuming. 



This shell reminds one somewhat of the P.jubata, but has no in- 

 dication of the pretty beaded crest which distinguishes that species. 



Pleurotoma digitale. Pleur. testd obeso-oblongd, nigerrimo- 

 fuscescente, apiceni versus incoloratd ; atifractibus convexis, tuber- 

 culis albidis minutis seriatim clathratis ; aperturd breoiusculd, sinu 

 lato. 



Conch. Icon., Pletirotoma, pi. 17. f. 138. 



Hab. Island of Burias, Philippines (found under stones at low 

 water) ; Cuming. 



Pleurotoma hastula. Pleur. testd elongato-ftisiformi, solidius- 

 culd, albidd, fuscescente sparsim maculatd ; anfractibus liris sub- 

 tilissimis numerosis cinctis, lira centruli lirisque superis majoribus, 

 prominentibus ; canali gracili, fissurd profundd. 



Conch. Icon., Pleurotoma, pi. 17, f. 139. 



