80 



INTRODUCTION TO ZOOLOGY. 



sented in Fig. 54, its members being adapted for swimming, 

 and its body so minute that its natural 

 size, when in that state, is shown by 

 the speck adjoining the letter n. 



Land-crabs. — In the limited space to 

 which, in a work of this kind, we are 

 necessarily restricted, it is only our 

 intention to notice the habits of a small 

 number of our native species; but the 

 land-crabs of foreign countries consti- 

 tute a group too remarkable to be 

 altogether omitted. Of the genus Thel- 

 p'husaf {Fig. 55), one fresh- water 

 species, a native of the rivers of 

 southern Europe, was well known to 

 the ancients, who often represented it 

 on their medals. Colonel Sykes states. 

 Fig. 54.— YouKo OP THE that another species is found in the 

 CoMMo.N Crab.* valleys along the Ghats in India, and 

 also on the most elevated table-iands.J They are there not 



only numerous but 

 troublesome, intrud- 

 ing themselves into 

 the tents, and even 

 invading such beds 

 as are placed on the 

 ground. He also in- 

 forms us, that the 

 table-land of the ele- 

 vated hill-fortress 

 Hurreechundurghur, 

 3900 feet above the 

 Fig. 55.-THELPHCSA. gg^^ ^ inhabited by 



such multitudes of land-crabs that their bmi-ows render 



* The figures 53, 54, and the information by which they are accom- 

 panied, are taken from " Zoological Researches," by J. V. Thompson. 

 A Zoea, different from any of the species noticed by that author, is de- 

 scribed by Templeton, in the Trans, of the Entomological Society, vol. ii. 

 p. 114. It was taken by us in Lame Lough, County Antrim, in May, 

 1835. 



t Carpenter's Zoology, vol. ii. page 250. Vide, also, Milne Edwards' 

 "Histoire des Crustaces," tome ii. page 10. 



X Trans. Entomological Society, vol. i. page 182. 



