MANUAL OF NATURAL HISTORY. 285 



the China Crabs (Leucosiidce) in the sandy bays ; 

 and when the tide leaves the mud banks, Calling- 

 Crabs (Gelasimi) coming out of their burrows in 

 dense crowds ; and the Gebice, or Mud-Bores, per- 

 forating the flats at the mouths of rivers, must all 

 be noticed, and if possible captured. 



In the Japan and China Seas many curious ge- 

 nera, not before seen, will be encountered, as Oeidia, 

 Acanthodes, Curtonotus, Berenia, and Eriocheir; in 

 New Zealand, and along the shores of New Holland, 

 will be found Naxia, Pseudocarcinus, Xantho, and 

 Portunus. In fact, whether they are " good for the 

 pot/' as the larger species ; whether they are para- 

 sites, on whales and fishes, as the Cymothoidce; whe- 

 ther they chew their food by teeth in their stomach, 

 as the Canceridce, or masticate it by the bases of their 

 hips, as the Limulidce; whether they breathe by 

 gills, as the Podopkthabni, or by their legs, as the 

 Amphipoda; whether they have long telescope-eyes, 

 as the Hacrophthalmus, or a single large eye, as in 

 Cydopidce, they are all equally remarkable animals, 

 and, as such, deserving of especial observation. 



IV. CLASS. CRUSTACEANS (Crustacea). 



Animal articulated, covered with a horny or cal- 

 careous skin ; legs jointed ; head furnished with 

 antennse and jaws ; respiration aquatic, by gills ; 

 blood colourless, in distinct vessels ; sexes distinct. 



I. LEGION. PEDUNCLE-EYED CRUSTACEANS (Podoph- 

 thalmata). 



Animal with gills properly so called ; eyes on 



