ECHIXODERMS. 141 



avoided by Star-fishes 1 . Of Sea-urchins about one-third of the 

 known species are found in the East-Indian seas : here especially 

 are found Cidarites and Scutella. Of Holothurice more species 

 appear to be met with in the southern Pacific than in other seas. 

 The western hemisphere is as much behind the eastern in respect 

 of Echini and Holothurice as of Star-fishes. 



1 Comp. MUELLER u. TROSCHELL Ueber die geographische Verbreitung der Asteriden 

 in WIEGMANN'S u. ERICHSON'S A rch. f. Naturgesch. x. 1843, s - I2 3 1 3- We have 

 borrowed the above short notices on the geographical distribution of the Echinodermata 

 from the System der Asteriden of these writers, and from LAMARCK Hist. not. des Anim. 

 sans vertebres, (compared with the specimens in the Leyden Museum). 



