187 
culis albidis minutis seriatim clathratis ; aperturd breviusculd, sinu 
lato. 
Conch. Icon., Pleurotoma, pl. 17. f. 138. 
Hab. Island of Burias, Philippines (found under stones at low 
water); Cuming. 
The sculpture of this shell reminds one of the pimpled surface of 
a thimble. 
Prrvrotoma 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, pl. 17. f. 1389. 
Hab. ? ; 
This species is chiefly characterized by the stout double ridge that 
encircles each whorl near the suture, and by the central ridge that 
is formed in place of the slit as the shell advances in growth. 
Puevroroma cuprea. Pleur. testdé acuminato-turritd, anfractibus 
superne depressis, fuscescentibus, liris nodulosis, subfleauosis, di- 
stantibus, longitudinalibus, ornatis ; aperturd brevi, sinu lato. 
Conch. Icon., Pleurotoma, pl. 17. f. 140. 
Hab. ? 
The little dark brown flexuous ridges, passing down the whorls of 
a much lighter brown, have a neat and conspicuous appearance. 
Pievrotoma varicosa. Fleur. testd acuminato-turritd, anfracti- 
bus superne levibus, infra longitudinaliter costatis, costis subirre- 
gularibus, griseis, interstitiis griseo-ceruleis, transversim striatis, 
varicibus rudibus lutescentibus grandibus sparsis peculiariter no- 
tatis ; canali brevissimo, leviter recurvo ; sinu lato, subprofundo. 
Conch. Icon., Pleurotoma, pl. 17. f. 141. 
Hab. Calapan, island of Mindoro, Philippines (found in coarse 
sand at the depth of fifteen fathoms) ; Cuming. 
Var. 3. Testa omnind fusca. 
Hab. Island of Corrigidor, Philippines (found in coarse sand at the 
depth of six fathoms) ; Cuming. 
This species may be easily recognized by its prominent display of 
varices. 
PrEevRoTOMA caRBoNARIA. Pleur. testd turritd, carbonarid; an- 
fractibus prope suturas depressis, levibus, infra costatis, costis 
angustis, distantibus, nodulosis ; columella callositate superné mu- 
nitd ; canali brevi ; sinu latissimo, profundo. 
Conch. Icon., Pleurotoma, pl. 17. f. 145. 
Hab. G 
All the specimens I have seen of this dark Melania-like species 
have the apex cither decorticated or broken away, an indication of 
their living in brackish water. 
