Bay of Bengal and the Arabian Sea. 3 
vati, oblique et nodose plicati, ad latera*levissime convexi, sntura 
obliqua sejuncti, striis spiralibus incisis numerosis, lineisque 
incrementi tenuibus obliquis flexuosis sculpti, ultimus mediocriter 
conyexus, undique transversim striatus, striis circa basin latis, 
sulciformibus ; apertura oblonga, alba, longit. totius 4 paulo 
minor, inferne brevissime et latissime canaliculata, subrecurva ; 
labrum tenue, in excavationem infra suturam feria sinuatum, 
infra arcuatum ; columella alba, callosa, in medio paulo arcuata, 
inferne oblique torta; operculum nullum. 
Longit. 50 millim., diam. 24; apertura 22 longa, 10 lata. 
flab. Station 134, off Kistna, Bay of Bengal, in 753 fathoms, 
The depression or concavity at the upper part of the whorls 
produces a marginate appearance at the suture, and upon the 
margination the lines of growth are slightly puckered. The 
spiral stria are somewhat deep and have rather a regular look 
to the naked eye. ‘he nodose plications at the angulation 
above do not extend far downwards, but soon become obso- 
lete, so that the lower part of the whorls has a nearly even 
surface. 
Like the type of the genus, this species has neither radula 
nor operculum. — It differs, however, in possessing eyes. 
Until the soft parts have been more fully examined, its 
position in the genus Pontiothuuma must be considered 
uncertain. 
Pleurotoma vagata. (Pl. I. fig. 3.) 
Testa fusiformis, turrita, alba, epidermide tenuissima induta, 
incrementi lineis flexuosis striata; spira elongata, acuminata ; 
anfractus 12, superne excavati, in medio carina quadrata tuber- 
culata instructi, superne infra suturam carino-marginati, undique 
spiraliter striati, infra medium liris spiralibus 1—2 cincti, ultimus 
transversim striatus et liratus, antice elongato-rostratus ; aper- 
tura cum canali longit. totius 3 haud wquans, intus alba, liris 
intrantibus circiter decem armata; labrum tenue, subprofunde 
incisum ; columella rectiuscula, leviter obliqua; canalis elongatus, 
angustus, subrecurvus, 
Longit. 65 millim., diam. 23; apertura cum canali 28 longa, in 
medio 7 lata. 
Hab. Station 172, off Trincomalee, Ceylon, in 200-350 
fathoms. 
This species belongs to that group of Plewrotoma which 
includes P. Kvenert, Doumet, P. carinata, Gray, and a few 
others which are characterized by a tuberculated keel upon 
the middle of the whorls. 
A single specimen only was obtained. 
1* 
