which I found. I have able to identify all but one. This is 

 an extremely peculiar organism which occurred in the gall- 

 bladder of Box salpa. It has something of the appearance 

 of a Leptotheca^ but seems to produce a variable number of 

 spores, from one or two to several. In no case were fully 

 formed spores found^ and as the number of parasites was 

 limited I have been unable as yet to come to any definite 

 opinion about it. It is, however, almost certainly neither 

 of the two Myxosporidia — Ceratomyxa pallida Thel. and 

 Hennegiija neapolitana Par. — which have been already 

 described from this host. The other parasites are well known. 



I. Ceratomyxa arcuata Thel. 



This organism occurred in the gall-bladder of one specimen 

 of Heliases chromis^ from which it has already been recorded. 

 It occurred only in small numbers. It was also found in the 

 gall-bladders of four specimens of Ophidiiim j^asalli^ a host 

 from which hitherto no Myxosporidia seem to have been 

 reported. 



2. Chloromyxum leydigi Ming. 



A few examples of this species were found in the gall-bladder 

 of the common dog-fish, Scylliiim caniciila. It has already 

 been reported from this host and from several other Elas- 

 mobranchs. 



3. Sphaeromyxa sabrazesi Lav. et Mesn. 



This was the only form that occurred in any abundance. 

 It has previously been recorded from the gall-bladder of 

 Hippocaj7tpus guttiilatus and Hippocampus brevirostris, I found 

 it not only in Hippocampus guttulaius^ but also in the gall- 

 bladders of four other fishes, — Motella tricirrata. Nerophis 

 annulatus^ Siphonostoma rondeletii^ and Sjngnathus acus, 

 I believe this is the first record of any Myxosporidia being 



