(214 My. E. A. Smith on 
atum; columella callo tenui amicta; canalis latus, brevis- 
simus. j 
Long. 104 mill., diam. 33. ; 
Var. Testa albida, hic illic prope suturam fusco maculata; anfr. 61, 
costis 12 instruct. 
Hab. ——: 
The shell which I place as a variety differs from the type 
chiefly in having the ribs stouter and one less on each whorl. 
In. both specimens, which have a semitransparent aspect, the 
nuclear half-whorl is brown. 
Pleurotoma (Mangilia) platycheila. 
Testa ovata, sordide albida, infra suturam hic illic fusco maculata, 
et circa anfr. ultimi medium rubro-fusco unizonata ; anfract. 64, 
supremi 21 leves, caeteri costis crassis flexuosis 10-11 superne 
versus suturam sensim attenuatis (in anfr. ultimo ad basim. desi- 
nentibus) instructi, passim spiraliter perspicue striati; apertura 
longit. totius fere 4 equans; labrum insigniter tenue, valde late- 
raliter dilatum, superne obsolete sinuatum ; columella callo tenuis- 
simo amicta; canalis apertus, brevissimus. 
Long. 64 mill, diam. 22. 
Hab. ——? 
‘The single reddish-brown band around the last whorl and 
the broadly expanded lip at once mark the distinctness of this 
species. The maculations near the suture are about three on 
a whorl. 
Pleurotoma (Mangilia) flexuosa. 
Testa ovata, fuscescenti-albida, linea rubro-fusea circa medium 
anfractuum et lineis duabus circa anfr. ultimum ornata ; anfract. 
61, primi 14 rotundi leves, ceteri perconvexi, costis flexuosis, 
confertis 15-16 (in anfr. ultimo ante basim evanidis) instruct ; 
anfr. ultimus striis paucis spiralibus inferne insculptus ; apertura 
ovata, longit. totius 2 equans; labrum extra costam ultimam maxi- 
mam valde incrassatum, intus album, superne paululum infra 
suturam levissime sinuatum; columella callo tenui suture juncto 
induta ; canalis brevissimus, latus. 
Long. 83 mill., diam. 3. 
Hab. —— ? 
In this species the ribs are flexuous, turning obliquely to 
the left above, and to the right at the base of the body-whorl ; 
and they are placed near together, being broader than the 
interstices between them. ‘The spiral reddish-brown lines 
are only apparent on the ribs. 
