185 
Conch. Icon., Pleurotoma, pl. 14. f. 114. 
Hab. Loay, island of Bohol, Philippines (dredged from sandy mud 
at the depth of seventeen fathoms) ; Cuming. 
A shell of simple character, unlike any hitherto-described species, 
though not presenting any very striking peculiarity. 
Pievrotoma prssuLatTa. Pleur. testd subacuto-fusiformi, fulvd 
vel cinered, anfractibus leviter convexis, longitudinaliter costatis, 
costis subdistantibus, striis transversis subobsoletis decussatis ; 
labro tenui, sinu parvo ; canali breviusculo, subrecurvo. 
Conch. Icon., Pleurotoma, pl. 14. f. 115. 
Hab. Bolinao, island of Luzon, Philippines (dredged from sandy 
mud at the depth of ten fathoms) ; Cuming. 
Although the ribs in this species are comparatively distant from 
each other, they vary considerably in this respect in different indi- 
viduals ; the more elongated the shell, the closer the ribs, as shown 
by the specimens figured. 
Pievrotoma conrracta. Pleur. testd elongato-ovatd, albidd ; an- 
Fractibus plano-convexis, superne contractis, costellis longitudina- 
libus numerosis, striisque transversis elevatis eximié reticulatis ; 
sinu lato, canali brevi. 
Conch. Icon., Pleurotoma, pl. 14. f. 116. 
Hab. Cagayan, province of Misamis, island of Mindanao, Philip- 
pines (dredged from sandy mud at the depth of twenty-five fathoms) ; 
Cuming. 
This species may be recognized by the peculiar contraction of the 
whorls near the suture ; the sculpture is not much unlike that of the 
C. gracilenta. 
PLEUROTOMA CEDO-NULLI. Pleur. testd lanceolato-fusiformi, eximie 
turritd, apice acuto; griseo-albicante ; anfractibus in medio valde 
carinatis, carind compressd, pereleganter diadematd ; sinu amplo, 
canali longissimo. 
Conch. Icon., Plewrotoma, pl. 14. f. 117. 
Hab. Bay of Panama (found in sandy mud at the depth of ten 
fathoms) ; Cuming. 
Although this beautiful little shell has not reached its mature 
growth, I do not hesitate to publish it as a new species; the curious 
diadem of sharp flattened processes, which forms so striking a pecu- 
liarity, is somewhat like that of the Fusus pagodus, Lesson, figured 
by Kiener, pl. 5. f.2. The sinus is rather large, and the sinuated 
strie on the upper part of the whorls distinctly exhibit the traces of 
its earlier formation throughout their several volutions. 
PLEUROTOMA CRASSILABRUM. Pleur. testd ovato-turritd, flavicante, 
Susco ceruleoque varie zonatd; anfractibus convexis, superne le- 
vibus, infra tuberculato-costatis, costis striis transversis elevatius- 
culis decussatis ; aperturd brevi, subrotundatd ; canali brevi, sub- 
tortuoso ; labro valde incrassato, varicoso, intis acuto, sinu rotun- 
dato. 
