new Species of Pleurotomide. 297 
anfract, ultimus superne rotundatus, basi subelongate caudatus, 
liris spiralibus 18-20 (quarum inferiores 9-10 circa caudam sim- 
plices sunt) ornatus; apertura parva, longit. totius 4 paulo 
superans; labrum tenue, ad suturam profunde angusteque inci- 
sum; columella tortuosa; canalis angustus obliquus, paululum 
recurvus, 
Long. 10 mill., diam. 3. 
Hab. Japan (A. Adams) ; Persian Gulf (Col. Pelly). 
This species partakes of the general aspect of P. reticulosa, 
but is distinguishable from it by its longer spire, narrower 
form, closer reticulation, and smooth apical whorls. 
Pleurotoma (Defrancia?) reticulosa. 
Testa fusiformis, luteo-alba; anfract. 10, primi 4 convexi, oblique 
tenuiter crebreque costati, et obsolete transversim striati, ceteri 
superne juxta suturam anguste leviterque canaliculati, infra cana- 
lem perconvexi, et concinne reticulati, reticulo ex costis tenuibus 
circiter 18 (in anfr. ultimo ante caudam obsoletis) et liris spirali- 
bus (in anfr. penultimo 6, supernis duabus quam ceterz minori- 
bus) supra costas subechinatis constructo ; anfr. ultimus superne 
rotundatus, inferne in caudam subelongatam productus, liris 
spiralibus ad 18 (inferioribus 10-12 simplicibus) cinctus ; aper- 
tura cum canali longit. totius ? adequans; labrum juxta sutu- 
ram anguste profundeque incisum ; columella tortuosa, haud cal- 
losa; canalis angustus, subelongatus. 
Long, 113 mill., diam. 4. 
Hab. Japan (A. Adams) ; Persian Gulf (Col. Pelly). 
At the base of the last whorl, around the cauda, a faint 
brown band is traceable. The smooth furrow at the top of 
the whorls, their reticulated surface, and the rather produced 
canal are characters at once indicating this species. 
Pleurotoma (Defrancia?) trifilosa. 
Testa ovato-turrita, nitens, albida, lineis tribus fusco-olivaceis circa 
medium anfractuum, et quatuor circa basim anfr. ultimi, ornata ; 
anfractus 7, primus castaneus, sequentes duo leves convexi, ceteri 
convexiusculi, costis obliquis tenuibus circiter 13 (in anfr. ultimo 
paululum infra medium evanidis) instructi, liris spiralibus ad 7 
supra costas subnodosis cincti; anfr, ultimus liris 19-20 ornatus ; 
apertura longitudinis totius ad ¢ equans; labrum leviter incras- 
satum et superne sinuatum, intus denticulatum ? (vix adultum) ; 
canalis brevis, obliquus, aliquanto recurvus. 
Long. 43 mill., diam. 12. 
Hab. ? 
This very pretty shell is remarkable for its numerous ribs, 
which are about equal in width to the interstices between 
Ann. & Mag. N. Hist. Ser. 5. Vol. x. 20 
