aLOSSARY. 309 



andergoing a peculiar metamorphosis, in which the young 

 animal is generally aquatic and breathes by gills. {Examples, 

 Frogs, Toads, and Newts.) 



iJOULDEES. — Large transported blocks of stone generally imbedded 

 ill clays or gravels. 



Beachiopoda. — A class of marine MoUusca, or soft-bodied animals, 

 furnished vith a bivalve shell, attached to submarine objects 

 by a stalk which passes through an aperture in one of the 

 valves, and furnished with fringed arms, by the action of 

 which food is carried to the mouth. 



BaAXCHLB. — GiUs or organs for respiration in water. 



Branchial. — Pertaining to gills or branchiae. 



Cambkian System. — A Series of very ancient Palaeozoic rocks, 

 between the Laurentian and the Silurian. Until recently 

 these were regai-ded as the oldest fossiUferous rocks. 



Canid^. — The Dog-family, including the Dog, Wolf, Pox, Jackal, &c. 



Cakapacb. — The shell enveloping the anterior part of the body in 

 Crustaceans generally ; applied also to the hard shelly pieces 

 of the Cirripedes. 



Cabbonifbbous. — This term is applied to the great formation 

 which includes, among other rocks, the coal-measures. It be- 

 longs to the oldest, or Palaeozoic, system of formations. 



Caudal. — Of or belonging to the tail. 



Cephalopods.— The highest class of the Mollusca, or soft-bodied 

 animals, characterised by having the mouth surrounded by a 

 greater ot less number of fleshy arms or tentacles, which, in 

 most Uving species, are furnished with sucking-cups. (Ex- 

 amples, Cuttle-fish, Nautilus.) 



Cetacba.— An order of Mammalia, including the Whales, Dolphins, 

 &c., having the form of the body flsh-like, the skin naked, and 

 only the fore-limbs developed. 



CHBLONLi. An order of Reptiles including the Turtles, Tortoises, 



&c. 



ClEEiPEDBS. An order of Crustaceans including the Barnacles and 



Acorn-shells. Their young resemble those of many other 

 Crustaceans in form ; but when mature they are always at- 

 tached to other objects, either directly or by means of a stalk, 

 and their bodies are enclosed by a calcareous shell composed of 

 several pieces, two of which can open to give issue to a bunch 

 of curled, jointed tentacles, which represent the limbs. 



