14 BULIMULUS. 
BORE'LIS. Montf. Metonia, Bl. A genus of microsopic 
Foraminifera. 
BRACHIO’PODA. A family of symmetrical bivalves, belong- 
ing to the third section of Lamarck’s order, Conchifera Mo- 
nomyaria, and containing the genera Orbicula, Terebratula, 
and Lingula; to which may be added, Thecidium, Productus, 
Spirifer, Magas, Pentamerus, Crania, Strigocephalus, Stro- 
phomena, and some others enumerated in the explanation of fig. 
201 to 219. 
BRANCHI'FERA. Bl. The second family of the order Cervi- 
cobranchiata, containing the following genera of symmetrical 
univalves :—Fissurella, Emarginula, and Parmophorus. 
BRIS’MA8US or Bisneus. Leach. Order. Pedunculated Cirri- 
pedes. Lam. Descr. Seven plates, three pairs lateral, one dor- 
sal; form, cylindrically conical; pedicle not described. Hab. 
Holes in corals. B. Rhophodius, fig. 38. Obs. This minute 
shell most nearly resembles Pollicipes Mitellus, fig.37*, but the 
difference may be seen at once by comparing the figures. 
BRON’TES. Montf. This generic name is given to such species 
of Murex as have a very long, closed canal, with a short spire, 
circular aperture, and are destitute of spines and ramifications. 
Brontes, (Murex) Haustellum, fig. 396. 
BUCARDIA. Schum. Isocarpia, Auct. 
BUC'CINUM. Linn. Fam. Purpurifera, Lam. Entomostomata, 
Bl. Descr. Subovate or oblong, covered with an epidermis; 
spire turrited, consisting of few whorls; aperture wide, subovate, 
terminating anteriorly in a very short canal, reflected over the 
back; outer lip simple, slightly reflected; inner lip spread over 
a portion of the body whorl, terminating in a thick, smooth 
columella; operculum horny. Hab. British Seas, Northern 
Ocean, coast of Africa. Most of the fossil species occur in 
Crag, some in upper marine formation and London clay. Obs. 
There are considerable difficulties in keeping this genus distinct 
from others nearly related to it, into which many of the species 
run by imperceptible gradations. The genus Nassa has been 
separated, on account of the little notch which terminates the 
columella. Some species of Terebra come so close upon the 
Buccina, that it is difficult to say where one genus ends and the 
other begins. T. Buccinoides, fig. 427. Buccinum Undatum, 
the common Whelk, fig. 421. 
BU’FO. Montf. Generic division of Ranella, characterized as 
not umbilicated. 
BULIMIMA. D’Orb. A genus of microsopic Foraminifera. 
BULIMULUS. Leach. Bulimulus trifasciatus (Bulinus Guadalou- 
pensis, Auct.) occurs inthelimestone which encloses the half 
fossilized human remains, from the Grande Terre of Guadaloup, 
and differs from Bulinus in the thinness of the outer lip, fig. 283, 
