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390 Scientific Proceedings of the 
#y of an inch. Inhabits Massachusetts Bay. Taken from a fish’s 
stomach taken off Race Point, and resembles B. lignaria in min- 
lature. 
Burts ntematis. B. test perparva, hyalina, globosa, convoluta, 
eel a tenué striata, spird unlla, apertura ad basim valdé dila- 
ta epgth ;, of an inch, breadth about the same. Inhabits Mas- 
sutbingiatts Bay. 
Butta Govipu. B. testa parva, ovata, convoluta, fragili, alba, 
transversim tenué striata, spira depressi, imperforata, interdum pro- 
minula, anfractibus quatuor, superné rotundatis, suturis impressis, 
apertura mre anaes versus basim dilataté, columella arcuata. 
Length }3, diameter ; of an inch, nearly. Inhabits Massachusetts 
Bay. In size and she much like B. insculpta, Totten, but is 
smoother, more solid and not umbilicated. Often the outer volution 
forms an elevated, rounded ridge, encircling and rising above the 
others. 
PLevrotoma prcussaTa, P. testi parvula, ovali, fusiformi, al- 
bida, anfractibus quinque convexis, longitudinaliter plicatis, trans- 
versé striis frequentibus tenuibus decussatis, aperturi elongato-ovali, 
basi sub-canaliculata, labro tenui, levi, superné indentato, columella 
nitida, depressd arcuata, ad basim sinistrorsum divergens. Opercu- 
lum rudis. Length 3, diameter 3, of an inch. Inhabits Misetiee 
setts Bay. Distinguished from Fusus harpularius by its color, the 
greater convexity of the whorls, and the angular sinus at the junction 
of the lip. 
ANCULoTUS DeNnTATUs. A. testd rotundata vel sub-conici, irregu- 
lari, olivaceo-nigrescente ; anfractibus quinque, ultimo magno, ventri- 
coso, sepe fasciis duobus aut tribus radiis cincto; suturis impressis, 
spira obtus4 plerumque eros’; apertura eros4, basi effusa ; columella 
atra arcuata, depressa, ad basim cower posticé excavata, intus vi- 
rido vel fusco-albescente. Operculo corneo, unguiculato. Length 
22, diameter }1 inch. Inhabits the rapids of the river Potomac, Va. 
Greatly ciaeanbiin A, monodontoides, Conrad, but is distinguished by 
the peculiar flattening of its purple columella, the remarkable fossa in the 
umbilical region, and its more obtuse tooth situated nearer the base. 
Dr. T. W. Harris, made some remarks on the difficulties met with by 
himself and others in the study of Botany, on account of the want of strict 
accuracy in our books. Thus, in Bige ow’s Florula, Vaccinium 1s placed 
in Octeandria, while all our species are invariably 10-androus, and are so 
arranged in all more recent works. Menyanthus has the stigma rifid 
oftener than bifid, and sometimes quadrifid. Cheledonium, which belongs 
to Polyandria, has only 8 to 12 stamens; while Crataegus, which belongs 
to 20-andria, is found with only 10 stamens. - 
