ECHINODERMS. 141 
avoided by Star-fishes!. 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 Holothurie 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 Echint and Holothurie as of Star-fishes. 
1 Comp. MUELLER u. TROScHELL Ueber die geographische Verbreitung der Asteriden 
in WIEGMANN’S u. Ericuson’s Arch. f. Naturgesch. x. 1843, 8. 123—130. 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 fist. nat. des Anim. 
sans vertébres, (compared with the specimens in the Leyden Museum). 
