GLOSSARY. 375 



Batrachia. (Gr. hatrachos, a frog.) The order of reptiles including the frog. 

 Bf.lejinite. (Gr. helemnon, a dart.) An extinct genus of molluscous animals 



allied to the sepia, and provided with a long, straight, chambered, conical shell in 



the interior of the body. 

 Bifid. Cleft into two parts, or forked. 

 Bifurcate. Divided into two prongs or forks. 

 Bilateral. Having two symmetrical sides. 

 BiLOBED. Divided into two lobes. 

 Bipartite. Divided into two parts. 

 Bituberculate. With two knobs or tubercles. 

 Bivalve. When a shell consists of two parts, closing like a double door. The 



Mollusca, so protected, are commonly called bivalves. 

 Bothriocephalus. (Gr. bothros, a pit ; kephale, a head.) The genus of tape- worms 



with depressions on the head. 

 BoTRYLLi. (^Gv.botrus, a bunch of grapes.) A little cluster of berry shaped 



bodies. 

 Brachial. (Gr. hracMon, the arm.) Belonging to the arm. 

 Brachiopoua. (Gr. hrachion ; poda, feet.) A class of acephalous Mollusca, with 



two long spiral fleshy arms continued from the side of the mouth. 

 Brachyuka. (Gr. brachus, short; oura, tail.) The tribe of Crustacea with short 



tails, as the crabs. 

 Brachyurocs. Short tailed ; usually restricted to the Crustacea. 

 Branchia. (Gr. bragchia, the gills of a fish.) The respiratory organs which 



extract the oxygen from air contained in water. 

 Branchiopods. (Gr. bragchia, gills ; poda, feet.) Crustacea in which the feet sup- 

 port the gills. 

 Bryozoa. ( Gr. bruon, moss ; zoon, animal. ) A class of highly-organised Polypes, 



most of the species of which incrust other animals or bodies like moss. 

 Buccal. (Lat. bucca, mouth or cheeks.) Belonging to the mouth. 

 Byssus (from the Greek word, signifying the silky fil iments which project from 



the bivalve called Pinna). Applied to the analogous parts in other MoUusks.. 



Cjecvsi and C^.ca. (Lat. ccecus, blind.) A blind tube, or productions of a tube 



which terminate in closed ends. 

 Canthus. (Gr. kanthos.) The corner of the eye. 

 Capitate. (Lat, caput, head.) When a part is terminated by a knob like the 



head of a pin. 

 Carapace. The upper shell of the crab or tortoise. 

 Cardia. (Gr. kardia, the heart or stomach.) The opening which admits the 



food into the stomach ; also the region called the pit of the stomach. 

 Carnivorous. (Lat. coro, flesh ; I'oro, I devour.) The animals which feed on flesh. 

 Caruncle. (Lat. carimcula.) A soft wart-like eminence. 

 Caudal. (Lat. car<c/a, a tail. ) Belonging to the tail. 

 Cauda Equina. The brush of nerves which terminates the spinal marrow in the 



human subject, and the analogous part in the lower animals. 

 Cellular tissue. (Lat. ceZ/a, a cell.) The elastic connecting tissue of the dif- 

 ferent parts of the body, which every where forms cells or interspaces containing 



fluid. 

 Centipede. (Lat. centum, a hundred ; pes, a foot.) A genus of insects with very 



numerous feet. 

 Cephalo-tiiorax. (Gr. kephale, head; thorax, chest.) The anterior division of 



the body in spiders, scorpions, &c., which consists of the head and chest blended 



together. 

 Cephalic. (Gr. /jc/jAaZe, head.) Belonging to the head. 

 Cephalopoda. (Gr. kephale,- poda, feet.) The class of molluscous animals in 



which long prehensile processes or feet project from the head, 

 Cercari^e. (Gr. herkos, a tail.) The animalcules whose body is terminated by a 



tail-like appendage. 

 Cercariiform. Shaped like Cercaria. 

 Cerc*. (Gr. herkos, a tail.) The feelers which project from the hind part of the 



body in some insects. 



B B 4 



