new Species of Pleurotomide. 207 
of the ribs also are of a paler colour than the interstices, the 
lower halves of which are darker than the upper. 
Pleurotoma (Clavus) interpunctata. 
Testa oblonga, subturrita, nitens, dilute rosea, zona angusta circa 
medium anfractuum et supra zonam illam inter costas punctorum 
saturate roseorum serie succincta; anfract. 9, superne excavati, 
inferne convexi, costis nodulosis cirea medium (in anfr. ultimo 9 
ad peripheriam obsoletis, ultima validissima roseo tincta, aliquanto 
pone labrum sita) instructi, lineis spiralibus incrementique lineis 
exiissime striati; anfr. ultimus zona secunda alba circa medium 
ornatus ; apertura lata, longitudinis totius circa 2 equans ; sinus 
parvus; canalis brevissimus; labrum tenue, effusum. 
Long. 16 mill., diam. 54. 
Hab. St. Thomas, West Indies. Coll. Cuming. 
This species is remarkable for the pretty disposition of 
coloration. 
Pleurotoma (Clavus) diversa. 
Testa crassa, ovata, flavo-aurantiaca, inter costas rufo tincta; an- 
fract. 8, convexiusculi, superne simplices, inferne costis crassis 
(in anfr. ultimo 10-11 prope medium eyanidis) instructi, ubique 
spiraliter exiliter striati; apertura longit. totius 2 adeequans ; 
columella callosa ad suturam valde tuberculata ; sinus mediocris, 
infra tuberculum situs; canalis brevis. 
Long. 14 mill., diam. 54. . 
Hab. ——? 
The ribs only occupy the lower two thirds of the whorl, 
the remainder being simple. The spiral striation is fine ; that 
towards the base of the body-whorl is a trifle coarser. 
Pleurotoma (Clavus).amanda. 
Testa ovato-turrita, alba, zona fuscescente infra medium anfractuum 
ornata; anfract. 10, convexi, superne: leviter excavati, et suban- 
eulati, costis plicosis, undulatis, obliquis (in anfr. penultimo 8, in 
ult. 7 basi fere continuis, ultima longe pone labrum sita validis- 
sima) instructi, transversim tenuiter confertim lirati, liris supra 
et inter costas continuis, longitudinaliter inter liras minute stri- 
ati; apertura basi lata, longitudinis totius 4 paulo superans ; 
columella rectiuscula, callo mediocri superne incrassato labroque 
juncto induta; canalis latissimus, perbrevis. 
Long. 17 ie diam. 61. 
Hiab. 
A slight vit or excavation exists between the ribs at the 
upper part of the whorls. The spiral lirations are very di- 
stinct and regular, and appear to be separated by pneuiee 
