new Species of Pleurotomidee. 211 
Pleurotoma (Crassisptra) atramentosa. 
Testa turrita, nigro-fusca, fere nigra; anfract. 12, superne juxta 
suturam unicarinati, infra carinam concayi, ad basim nodulorum 
14 serie unica (in anfr. ultimo in costas deorsum producta) or- 
nati, et liris spiralibus duabus nodulos connectentibus cincti; 
anfr. ultimus infra nodulos liris 5 validis distantibus supra costas 
subnodosis, et infra eas circa caudam aliis minoribus circiter 10 
succinctus, atque inter liras spiraliter sparsim striatus; apertura 
purpureo-nigra, longit. totius 1 paulo excedens ; columella callosa ; 
labrum paululum pone marginem costa ultima incrassatum, su- 
perne infra carimam subprofunde sinuatum ; canalis:perbrevis, - 
vix recurvus. 
Long. 21 mill., diam. 7. 
Hab. Panama. Coll. Cuming. 
Care must be taken not to confound this species with P. 
discors, Sowerby, from which it mainly differs in having the 
row of nodules at the base of the whorl connected by two 
spiral lirations. The nodules in P. discors are much smaller 
and not joined together by lire; and the keel at the upper 
part of the whorls is much more prominent than in the present 
species. 
Pleurotoma (Orassispira) cubensis. 
Pleurotoma luctuosa, d’Orbigny, Sagra’s Hist. Nat. Cuba, vol. ii. p. 172, 
pl. xxii. figs. 29-31. 
Hab. Cuba (d’ Orbigny) ; St. Thomas. Coll. Cuming. 
The specific name luctuosa having been used by Hinds 
before d’Orbigny for a Californian species belonging to the 
same group of Pleurotomide, I have deemed it advisable to 
propose cubensis as a trivial name for the West-Indian shell. 
Pleurotoma (Crassispira) albopustulata. 
Pleurotoma albomaculata, d’Orbigny, Sagra’s Hist. de Cuba, vol. ii. 
p. 176, pl. xxiv. figs. 16-18. 
Hab. Cuba (@’ Orbigny). 
C. B. Adams described an allied species from Jamaica in 
the Proc. Boston Soc. Nat. Hist. 1845, vol. 11. p. 3, under the 
name P. albo-maculata. Such being the case, I propose the 
above name for the Cuban species, the description of which 
dates, according to the author, about 1846. P. jayana, C. B. 
Adams, is also a closely allied form. 
Pleurotoma (Crassispira) caribbea. 
Testa elongate fusiformi-ovata, nigro-fusca, costis crassis flavidis 
ornata; anfract. 8, convexiusculi, superne prope suturam leviter 
