318 o^' l'Ai LSI \. 



Iwo or lour foils aic oIUmi seen lo Ik- loi;cllu'r aiui affaiii dividing. 

 Ihr i-c'll-\vnll is lalluT lliicU, in some cases 1 have been able lo see 

 a Ihrt'e-lold outline (li^. I'J; llie oiiliiiost layer is veiy Ihiii and in- 

 (•ons|)icnons, by Irealnieiil with chloriodide ol zinc it disa|)|)eais 

 bul nol wilh l^an di' .lanelle (a mucilage?) The wall ilself is co- 

 lourt'd brownish \iolet by cbloiiodide of /.inc. In sj)ite ol" eager 

 research it has nol bet-n possible lo lind olher stages ol" this orga- 

 nism than Ihose here mentioned and lignied. 



The syslemalic i)osilion of Ihis species, imperfectly known as il 

 is. must of course be uncertain. I refer it wilh some doubl to the 

 genus Apodininni Challon (Comptes rendus Ac. sc. Paris 1-J4. 1U()7, 

 |). 28.'}, wilh lignres. Se also: ibid. 143, Challon: Les Blaslodinides, 

 ordre nouveau des Dinollagellés parasiles.) The olher Blastodinidae 

 described and figured by Chatton are far from being like our spe- 

 cies, but Apodininni niycetoides, a parasite upon Appendicularia, 

 shows some fealures wbich call lo mind A. Chaetoceratis. A. niyce- 

 toides is fixed upon the host by a long slalk. Growing up and 

 dividing il has at first some resemblance to our species, being two- 

 celled and of about the same form, but it is only partly filled by 

 l)lasma, a great "lacune aqueuse" taking most of the room in the 

 two cells. Later on the distal cell ("blastocyte") divides again for- 

 ming many spores which again divide, and so a lot of small Gym- 

 nod i ni nni-Wke spores are formed. The proximal blastocyte after a 

 rest divides, and the new distal cell forms a new generation of 

 spores, as described above. 



Of all this I have found no trace by Apodiniumfy Chaetoceratis. 

 As a whole this species may be calJed rather dubious. 



U-3--l')ll. 



