new Species of Pleurotomide. 299 
Pleurotoma (Defrancia?) albicaudata. 
Testa ovata, superne acuminata, fusca, ad apicem et basi anfracti 
ultimi alba; anfractus 7, superne 2-3 albi, minutissime reticu- 
lati, ceeteri convexiusculi, sutura subprofunda discreti, costis cir- 
eiter 12, et liris spiralibus 3-4, supra costas subnodulosis fenes- 
trati; anfract. ultimus liris spiralibus 12, quarum inferiores 6 
albe granoszeque sunt, ornatus; apertura longit. totius quam £ 
paulo minor; labrum extra valde incrassatum, intus denticulis 
4—5 munitum, prope suturam subprofunde sinuatum; canalis 
brevis. 
Long. 4 mill., diam. 13. 
Hab. Persian Gulf (Col. Pelly). 
The contrast of colour, the chief portion of the shell being a 
rich brown, with the apex and lower part of the body-whorl 
white, is very remarkable. This peculiarity, together with 
the strongly cancellated surface, at once distinguish this 
pretty species. 
Pleurotoma (Defrancia ?) moretonica. 
Testa ovato-fusiformis, brunnea; anfr. 9, primi 2 leves, politi, ter- 
tius minute reticulatus, ceteri superne decliviter tabulati, inferne 
planiusculi, costis tenuibus 22—24 (in anfr. ultimo ad basim haud 
continuis) et liris spiralibus precipuis 3 et aliis minoribus inter 
illas (in anfr. ultimo circiter 25) tenuiter reticulati; apertura 
angusta, longit. totius 4 equans; labrum extra incrassatum, 
margine crenulatum, superne modice sinuatum ; canalis brevis, 
angustus. 
Long. 11 mill., diam. 33. 
Hab. Moreton Bay, Queensland (Strange). 
The uniform brown colour and the fine reticulation are the 
chief characteristics. ‘The spiral lirations are slightly nodu- 
lous on crossing the ribs. 
Pleurotoma (Defrancia?) commoda. 
Testa elongato-ovata, alba; anfract. 8, primus levis, secundus minute 
oblique reticulatus, ceeteri convexiusculi, costis tenuibus ad 14 
(in anfr. ultimo basim vix attingentibus) et liris spiralibus gracili- 
bus (in anfr. penult. 6—7, in ultimo circiter 16) concinne cancel- 
lati; apertura longit. totius 3 paulo minor ; columella callo tenui 
induta; labrum extra incrassatum, intus liris tenuibus 9-10 
ornatum, versus suturam rotunde sinuatum; canalis angustatus, 
brevis. 
Long. 8 mill., diam. 23. 
Hab. California. 
The spiral lirations are rather finer than the longitudinal 
ribs, and are slightly thickened on crossing them. In some 
20* 
