186 
Conch. Icon., Pleurotoma, pl. 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, pl. 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. 
Prrurotoma Hinpsu. Pleur. testd ovatd, subinflatd, albidd, fus- 
cescente pallide variegatd ; anfractibus costis duabus, ultimo costis 
quatuor, distantibus, cingulatis, costellis numerosis, compressis, 
eximié cancellatis ; aperturd ovatd ; canali brevi. 
Conch. Icon., Pleurotoma, pl. 14. f. 119. 
Hab. Baclayon, island of Bohol, Philippines (found under stones 
on the reefs at low water) ; Cuming. 
This beautifully cancellated shell is closely allied to the P. tricos- 
tata; the ribs, however, are more in number and less prominent. 
Each whorl exhibits four transverse ribs on its formation, the two 
lower being concealed in all but the last whorl by the lodgement of 
one whorl upon the other. The cancellated spaces formed over the 
surface of the shell by the longitudinal ribs crossing the transverse 
ones seem slightly concave, and have a very characteristic appear- 
ance. 
By the above title I wish to honour and keep in remembrance the 
name of my liberal friend Richard Brinsley Hinds, Esq., R.N., on 
account of the services he is at this moment rendering to concholo- 
gical science by his cautious examination and description of the new 
shells collected by Capt. Sir Edward Belcher and himself during the 
late prolific expedition of H.M.S. Sulphur. 
PLEUROTOMA LACTEA. Fleur. testd ovato-oblongd, tenui, subinflatd, 
lacted, costis carinisve rotundatis striisque exilibus cinctd ; labro 
simplici, acuto ; sinu parvo ; aperturd ovatd, canali brevissimo. 
Conch. Icon., Pleurotoma, pl. 15. f. 128. 
Hab. Bolinao, island of Luzon, and Gindulman, island of Bohol, 
Philippines (found under stones at low water) ; Cuming. 
PLEUROTOMA BREVICAUDATA. Pleur. testé abbreviato-fusiformi, 
solidd, luteold, apice basique fuscescentibus ; anfractibus convevis, 
superne unicarinatis, infra bicarinatis, anfractu ultimo multicari- 
nato ; labro simplici, acuto; sinu amplo ; aperturd parvd, brevi, 
canal breviusculo. 
Conch. Icon., Pleurotoma, pl. 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. 
PiEvROTOMA bDieiTaLE. Pleur. testd obeso-oblongd, nigerrimo- 
Suscescente, apicem versus incoloratd ; anfractibus convevis, tuber- 
