86 



INTRODUCTION TO ZOOLOGY. 



known example ; it is taken all round the rocky portions of 

 the coast. So much is it valued, that the finest flounders and 

 plaice are, in some places, cut up to furnish the most tempting 

 bait for the Lobster-pots.* Another species, the Spiny Lobster 

 (Palinurus vulgaris. Fig. 58), attains even larger dimensions, 

 being occasionally taken of eighteen or twenty inches in 

 length, and weighing so much as twelve or fifteen pounds.* 

 It frequents deep water, and only approaches the shores in 

 spring, for the purpose of laying its eggs. 



The Cray-fish {Fig. 59) inhabits rivers in many parts of 



Fig. 59. CRAY-FISH (REDUCED).! Fig. CO. MASTICATING APPARATUS.:}: 

 * W. T. 



>rmea lor swimming. 

 J Fig. 60. Shows, in their detached state, the six pair of appendages which 

 >nstitut,e the apparatus for mastication, a, MandiWes. b and c, First and 

 icond pair of jaws or maxillae. d, c,f, Three pair of feet-jaws. 



