Zoological Society. 301 



Pleurotoma crassilabrum. Pleur. testd ovato-turritd , flavicante 

 fusco cceruleoque varie zonatd; anfractibus convexis, superne la- 

 vibus, infrh tuber culato-costatis, costis striis transversis elevatius- 

 culis decussatis ; aperturd brevi, subrotundatd ; canali brevi, sub- 

 tortuoso ; labro valde incrassato, varicoso, intus acuto, sinu rotun- 

 dato. 

 Conch. Icon., Pleurotoma, pi. 14. f. 118 b & c. 

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

 Var. /3. Testa incolorata, striis transversis fere obsoletis. 

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



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 Hindsii. Pleur. testd ovatd, subinflatd, albidd,fus- 

 cescente pallide variegatd ; anfractibus costis duabus, ultimo costis 

 quatuor, distantibus, cingulatis, costellis numerosis, compressis, 

 eximie cancellatis ; aperturd ovatd ; canali brevi. 

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



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

 on the reefs at low water) ; Cuming. 



Pleurotoma lactea. Pleur. testd ovato -oblong a, tenui, subinflatd, 

 lacted, costis carinisve rotundatis 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 abbreviato-fusiformi, 

 solidd, luteold, apice basique fuscescentibus ; anfractibus convexis, 

 superne unicarinatis, infra 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, apicem versus incolorata ; anfractibus convexis, tuber- 

 culis albidis minutis seriatim clathratis ; aperturd breviusculd, sinu 

 lato. 

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



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

 water) ; Cuming. 



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

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

 tilissimis numerosis cinctis, lird centrali lirisque superis majoribus, 

 prominentibus ; canali gracili, fissurd profundd. 

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



