60 



the expanded fins are due to better methods of preservation ; the speci- 

 mens of B. Belcheri not being, in all probability, prepared for histo- 

 logical study. 



As far as the evidence allows we may then, provisionally, decide 

 that the Japanese Amphioxus belongs to the species known as Bran- 

 chiostomutn Belcheri. The geographical distribution of this species favors 

 this conclusion since we may easily suppose it extended from Borneo 

 to Japan as it is already known South to the Prince of Wales Islands 

 and is thus of wide distribution. 



In concluding that the lancelet of Japan is probably Branckiostomurn 

 Belcheri we cannot but emphasize the fact that the systematic know- 

 ledge of this group is in a very unsatisfactory state and that a complete 

 revision is much to be desired ; in fact it is almost necessary before 

 any permanent value can be assigned to specific determinations. Re- 

 cognizing the inadequacy of characters drawn from preserved speci- 

 mens, even when they are well preserved, we must hope that a new 

 study of living specimens in various regions will lay the foundation 

 for a true conception of the classification, variation and geographical 

 distribution of the Acraniates. Nowhere could this be begun better 

 than in Japan by Japanese students. 



6. Die Odonaten der Collection Eversmann. 



Von Iwan Ingenitzky, St. Petersburg. 



eingeg. 14. December 1894. 



Kürzlich glückte es mir, durch Zufall, den Theil der entomologi- 

 schen Collection des berühmten Kenners der Fauna Rußlands aus- 

 findig zu machen, welcher für verloren galt, da der Liebhaber Kire- 

 j eff , in dessen Besitz die Sammlung übergegangen Avar, im türkisch- 

 serbischen Kriege ums Leben gekommen ist. 



Die, der Zeit und den Umständen nach, im Ganzen noch recht 

 gut conservierte Sammlung besteht aus neun großen Kästen in Qua- 

 dratform, von denen drei Netzflügler im engeren Sinne enthalten, die 

 übrigen sechs dagegen Libellen in mehr als 400 Exemplaren (442). — 



Alle zehn von Eversmann beschriebene Typen ^, gleich wie 

 auch die in seiner Übersicht 2 und den Arbeiten von Selys-Long- 

 champs'* und Hagen^ erwähnten Libellenarten sind in dieser Col- 



' Libellulinarum species novae, quas inter Wolgam fluvium et montes Uralenses 

 observavit Dr. E. Eversmann. Bulletin de la Société Impériale. 



2 Insecta Wolgam fluvium inter et mont. Ural observata 1836. 



3 »Revue des Odonates.« 1850. 



* »Die Odonaten-Fauna des russischen Reichs.« Entomol. Zeitung 1856. 



