775 



round which the whorls of a spiral shell 

 revolve. 



AZURE. A pale but clear and brilliant blue 

 colour. 



BACCIVOROU9. Feeding or subsisting on 

 berries. 



BARBATE. When any part is clothed with 

 longer hairs, resembling a beard. 



BARBED. Furnished with cirri, or with fila- 

 ments resembling a beard. Armed with 

 jagged hooks or dart-like points. 



BARBULES. Filamentous appendages, or 

 barbs, attached to the mouths of certain 

 fishes. 



BASAL. Pertaining to or constituting the 

 base. 



BASE. The lower termination of any part. 

 This term is sometimes used, in coneho- 

 logy, as simply opposed to apex, and 

 applied to the anterior of the aperture ; 

 but, according to Sowerby, "in all shells 

 that are attached to marine substances, the 

 base is that part of the shell which forms 

 the point of attachment. Ex. The at- 

 tached valve of Spondylus ; the basal plate 

 of Balanus ; the lower part of the pedicle 

 of Pentalasmus : in unattached bivalves, 

 the margin opposite the umbones where 

 the part analogous to the foot of the ani- 

 mal protrudes : in spiral univalves, the 

 aperture, which rests on the back of the 

 animal when walking." 



BAT-FOWLING. A mode of catching birds 

 at night, by holding a torch or lant- 

 horn, and beating the bush where they 

 roost. The birds flying to the light are 

 then generally caught with nets. 



BATRACHIAN. Pertaining to frogs : an epi- 

 thet designating an order of reptiles, which 

 includes frogs, toads, and other allied 

 animals. 



BAY. Of a bright red brown, inclining to a 

 chestnut colour. 



BEE-BKEAD. The pollen of flowers collected 

 by bees, as food for their young. 



BEETLE-BROWED. Having prominent brows. 



BELTING. When the eyes of an insect nearly 

 meet both above and below the head, so as 

 to form a kind of belt round it. 



BIARTICULATE. Composed of two articula- 

 tions or joints : applied to the antennae 

 and the abdomen of insects. 



BIANGULATED. Having two corners or 

 angles. 



BICAUDATE. Having two tails. 



BICARINATED. Having two elevated or 

 sharp ridges. 



BICIPITAL. BICIPITOUS. Having two heads. 

 Applied to the muscles, it signifies having 

 two heads or origins ; and any such muscle 

 is denominated biceps. 



BICOLLIG ATE. In ornithology, the connexion 

 of all the anterior toes by a basal web. 



BICORNUTE. BICORNOUS. Having two horns. 



BICUSPID. Having two points. 



BIDENTAL. Having only two teeth. 



BIDIGITATE. Having two fingers or finger- 

 like appendages. 



BIFARIOUS. Parting in opposite directions. 



BIFID. Divided by having a deep notch 

 down the centre, opening with a cleft. 



BIFOKM. Having two forms, bodies, or shapes. 



BIFURCATED. Divided into two prongs or 

 forks. In entomology, denoting that the 

 antennae are composed of three joints, of 

 which the apical one is bent double, and 

 attached to the second joint by its centre. 



BILABIATE. Furnished with two lips. 



BILATERAL. Having two symmetrical sides. 



BILIARY. Belonging to or conveying the 

 bile ; as, a biliary duct. 



BILOBED. BILOBAXE. Divided into two 

 lobes. 



BILOCULAB. Divided into or containing two 

 cells. 



BIMARGINATE. Furnished with a double 

 margin ; as the lip of certain shells. 



BIOCELLATK. When, the wing of an insect 

 is marked with two eye-like spots. 



BIPALPATE. When an imperfect mouth has 

 only labial or maxillary palpi. 



BIPAROUS. Bringing forth two at a birth. 



BIPARTITE. Divided into two corresponding 

 parts. Applied to the antennae, it signifies 

 that they are divided to the base into two 

 nearly equal branches. 



BIPECTINATE. Relating to some part which 

 has two margins toothed like a comb. 



BIPED. An animal having two feet, as Man. 



BIPEDAL. Having two feet. 



BIPELTATE. Relating to any part having a 

 defence like a common shield. 



BIPENNATE. Having two wings. 



BIPUPILLATE. When an eye-like spot on 

 the wing of a butterfly, has two dots or 

 pupils witliin it of a different colour. 



BIRADIATE. Having two rays ; as, a bira- 

 diate fin. 



BISECT. BISECTED. When the head and 

 trunk are not separated by a suture, so 

 that an insect consists only of two pieces. 



BISERRATE. When the antenna? are on each 

 side serrate or toothed like a saw. 



BISEXUAL. Partaking of the nature of both 

 sexes. 



BISULCOUS. Cloven-footed ; as, swine or 

 oxen. 



BITUBERCULATE. Having two knobs or 

 tubercles. 



BIVALVE. A shell consisting of two parts, 

 which open and shut, as the oyster. 



BIVALVE : BIVALVULAR. Having two valves 

 or shells which open and shut. 



BIVENTRAL. Having two bellies. 



BLOOD. The nutritive fluid which circulates 

 through the arteries and veins of an animal 

 body, and which is essential 'to the pre- 

 servation of life. All the other animal 

 fluids are derived from the blood by secre- 

 tion. 



BLUBBER. The fat of whales and other large 

 marine animals, of which is made train- 

 oil. It lies immediately under the skin 

 and over the muscular flesh. 



BOMBYCINOUS. Of the colour of the silk- 

 worm ; transparent, with a yellow tint. 



BOOM. To cry as the bittern. 



BOREAL. Pertaining to the north or north- 

 ern regions. 



Boss. In bivalve shells, the projecting point 

 in each valve, near the hinge. 



BOSSED. Studded or knobbed ; covered over 

 with protuberances. 



BOTRYLLI. A little cluster of berry-shaped 

 bodies. 



