74 Spermatophorce of molluscous Cephalopods, §c, 



creatures, Acalephce hydrostaticce, which have been known 

 by the name of Physophorae, which resemble long garlands 

 of flowers intermixed with little berries, and spirally con- 

 torted stipules ; not yet having finished the drawings, it will 

 be difficult for me to communicate what I have been able 

 to collect from their complicated structure. I may intimate 

 that I have now the conviction that these are not simple 

 animals, but aggregations of a great number of individuals 

 produced (par bourgeons) and living reunited the same as 

 compound polypi. 



It seems equally probable to me that these compound 

 Acalephaae have their distinct sex ; for in some, where the 

 traces of an ovary could not be perceived, I found organs 

 filled with spermatic animalculse. 



Apparatus of circulation ; Holothurice. — Lastly I send you 

 also a drawing of the apparatus of circulation of theHolothuriae. 



The descriptions which have been given of them by 

 MM. Tiedeman and Delle Chiage are so discordant, that 

 it was necessary for me to examine this point again ; and 

 I have assured myself that the disposition of the vessels 

 is almost the same as that indicated by M. Delle Chiage. 



It is a matter of regret we have not the drawings mentioned in the 

 above letter of M. Milne Edwards ; they refer to facts of the greatest 

 importance in Zoology. — Jos. M. 



Notice of a fossil Termes. By M. Ouchakoff.* 



The greater part of fossil insects which are described and 

 which have been observed in amber, belong to those genera 

 existing in hot countries, and almost all of them have an 

 analogy more or less great with our living species. According 

 to my information on this subject we have not yet discovered 

 in amber insects the types of which seem not now to exist, 

 and which have no actual representations in existing genera ; 



* From the Annates des Sciences. 



