296 



ZOOLOGY. 



It comprises the order of Merostrymafa represented at the 

 present day by the king-crab, and the order TriloMta, -which 

 is wholly extinct. The organization of the king-crab is so 



Pig 263—Cambaruapelluciilus, the blind craw-fisli of Mammoth Cave. Natural 

 size. 



■wholly unlike that of the Crustacea, when we consider 

 the want of antennae, the fact that the nervous system ia 



