Ill 



tliero meet tlie voracious sharks and several species of 

 fislies_, tlie spines of vrliicli contain venom more oi* less 

 virulent^ and capable even oi producing dcatli. 



Tliese arc met principally among tlie species of tiie genns 

 Sijnancela known under tlic name of Laffe of wiiich 1\l. de 

 E. bronglit to our notice a new species remarkable for its 

 weight and liideous aspect. 



M. de E,. concludes v,'ifc]i a notice on tlie genus Ilolotltnria 

 of wliicli several species arc found on tlie coasts of Mau- 

 ritiu3. 



A remarkable plienomenom is observable on some spe- 

 cies. After tjicy have remained a certain laps of time 

 out of the water^ they spontaneously throw up their vis- 

 cera^ but, if returned to the water, new viscera are repro- 

 duced in a short timc^ and their reorganisation is entirely 

 reconstructed. 



Other species exhibit still more curious phenomena. 

 Tiiey separate into two pieces v,hicli remain for some time 

 apart^ and afterwards resume their former state. 



According to the same gentlemaU;, tlicrc arc fifteen 

 species of Ilolofhuria living on our coasits — the largest 

 were seen at " Black Ilivcr '' and the " ]Mornc." \\'g 

 may remember that some ycavs ago several inhabitants of 

 Black PLiver district collected them for exportation. The 

 Chinese arc very fond of those JfoJolltnrin--^, par!:icula}']y 

 of the kind connn;)nly called I'l-ipiniii. 



"Dt h": Juve ommunicnTcd to the Society tlic result of 

 his study or the ciectvi;" apparatus with which is provided 



