48 Dr. P. P. Carpenter on new Forms of Mollusks. 
norm. v., effusis, subplanatis, ultimo paulum constricto ; costulis 
radiantibus cire. xx., aperturam versus evanidis; apertura sub- 
quadrata ; labro haud incrassato, interdum intus subtiliter striato, 
haud dentato; labio appresso; columella abrupte truncata. 
Long. *3, long. spir. *2, lat. *11 poll., div. 23°. 
Variat basi fusco tincta, seu tota superficie ut in Nitidella eribraria 
picta. 
47, Sistrum (? ochrostoma, var.) rufonotatum. 
S. testa S. ochrostomati simili, sed minore, angustiore, vix tabulata ; 
alba, linea punctorum rufo-fuseorum subperipheriali, interdum 
lineis spiralibus, interdum ejusdem coloris maculis, ornata; vert. 
nucl, mamillato, anfr. iil., leevibus, vix tumidis; norm. v., plus 
minusve elongatis, in medio nodoso-angulatis, postice planatis, 
suturis ad angulum yalde obtusum conspicuis ; seriebus nodulorum 
spiralibus iii., quarum postica major, secundum costas radiantes 
obsoletas cire. vi.—vili. ordinatis ; seriebus anticis inconspicuis ii. ; 
interdum costulis spiralibus intercalatis; canali brevi, rectiore, 
aperto, angusto; apertura subovali, vix subquadrata, intus pallide 
aurantiaca; labro acutiore, dorsaliter subvaricoso, postice seepe 
sinuato, intus obscure vi.-dentato ; labio conspicuo, interdum ex- 
stante. Long. 5, long. spir. *23, lat. *32 poll., div. 60°. 
Variat testa obesa, nodulis validis. Variat quoque testa acuminata, 
nodulis subobsoletis. Long. °52, long. spir. °23, lat. *25 poll., 
div. 42°. 
48. ?.Nitidella millepunctata. 
2N. testa parva, nitida, livida; spira exstante, anfractibus subpla- 
natis, suturis distinctis ; anfr. nucl. leevibus, adolescentibus obso- 
lete radiatim lirulatis, adultis leevibus; zona alba postica, suturam 
attingente, aurantiaco maculata ; tota praeter zonam superficie au- 
rantiaco puncticulata, punctis minimis, creberrimis, in quincunces 
dispositis ; apertura subquadrata ; labro incrassato, intus vi.-den- 
tato; labio exstante, a lirulis circa basim spiralibus indentato. 
Long. *3, long. spir. ‘17, lat. +15 poll., div. 40°. 
Differs from Columbella albuginosa, Rve., in its peculiar and 
constant painting. 
49. ?Nitidella densilineata. 
?N. testa ?N. millepunctatam forma et indole simulante, sed omnino 
nitida, anfractibus planatis, suturis indistinctis, striolis cirea basim 
minimis ; livida, lineolis aurantiaco-fuscis divaricatis, seepe ziczac- 
formibus, densissime signata. Long. *25, long. spir. °15, lat. *1 
poll., div. 35°. 
The opercula of these two species being unknown, their 
generic position remains doubtful. The same is true of the two 
following. 
50. ?Anachis tincta. 
?4, testa parva, turrita, albida, rufo-aurantiaco supra costas tincta ; 
anfr, nucl. levibus; norm. iv.-v., subplanatis, suturis valde im- 
