594 



formed that a specimen of Cephalodiscus from Eastern seas was in the 

 possession of the Copenhagen Museum, I communicated my dis- 

 covery to Dr. Le vin s en, who most generously sent me his material 

 for description. This specimen was dredged in 100 fathoms at the 

 South end of the Strait between Japan and Corea. The third specimen 

 was subsequently found among the ,,Siboga" Polyzoa, and had been 

 obtained at the South East extremity of Celebes (Station 204), in 75 

 — 94 metres. 



The three specimens which are thus in my possession differ in 

 important respects from one another and from C. dodecalophus^ and 

 there can be little doubt that each of the three constitutes the type of 

 a new species. The Japanese species is not unlike C. dodecalophus 

 in the form of its tubes, but its elongated, cylindrical zooids differ 

 strikingly from those of that species. The Bornean specimen consists 

 of delicate tubes, which creep over the branches of a species of Tubu- 

 cellaria and are of very different appearance from those of the above 

 species. The zooids are characterised by their extremely elongated, 

 Bhabdopleura-like stalk. The specimen from Celebes is unfort- 

 unately in a bad state of preservation, but I think it cannot be doubted 

 that it is distinct from the Bornean specimen, to which it appears to 

 be most nearly allied. The Japanese and the Bornean specimens con- 

 tain embryos, the oldest of which are in a planula-stage corresponding 

 with that described by Andersson. 



The existence of several species of Cephalodiscus in Oriental 

 waters is a surprising fact, which shows that the genus has a far wider 

 distribution than has hitherto been supposed, and probably indicates 

 that it will hereafter be found in various parts of the Indian and Pacific 

 Oceans. The littoral Bornean form is by no means a conspicuous ob- 

 ject, and might easily be overlooked in sorting a collection of marine 

 organisms. 



6. Eine neue Cladoceren-Gattung aus der Familie der Bosminiden. 



(Vorläufige Mittheilung.) 

 Von Dr. E. v. Daday, o. Prof. d. Zoologie am Polytechnicum in Budapest. 



(Mit 3 Figuren.) 



eingeg. 3. Mai 1903. 



Aus der zum Subordo Cladocera gehörenden Familie der Bos- 

 m ini da e waren bisher bloß die beiden Gattungen Bosmina Baird und 

 Bosminopsis J. Eich, mit deren Arten bekannt. Im Laufe des vorigen 

 Jahres (1902) nun sandte mir Prof. J. D. Ani sit s freundlichst eine 

 ansehnliche Menge Planktonmaterials aus Paraguay, worin es mir ge- 



