388 Miscellaneous. 
On the Swimming-Bladder and Sexual Organs of the Murenoid 
Fishes. By Pror. Kner. 
Professor Kner communicates the results of his investigation of the 
swimming-bladders and sexual organs of thirty-six species of eel-like 
fishes. The species examined belong to nineteen of Bleeker’s genera, 
distributed through six families. 
The swimming-bladder occurs, more or less developed, in all the ex- 
amined species and genera of three families—namely the Anguilloidei, 
Congyroidet, and Ophisuridi ; whilst it is wanting in the other three 
families, viz. Gymnothoracoidei, Ptyobranchoidei, and Symbranchii. 
The sexual organs are sometimes symmetrical, and sometimes the 
reverse ; in the former case they sometimes show the same structure, 
resembling that of our common eel, in all the specimens examined, 
and therefore, as in that species, leave the determination of the sex 
uncertain, but sometimes exhibit differences of structure in different 
individuals ; so that many species decidedly have the sexes separate. 
The latter result was also obtained by the examination of several 
species with unsymmetrical sexual organs, whilst others left doubts 
upon this point. In aspecies of the family Symbranchii (Ophisternon 
bengalense=Symbranchus bengalensis, Bleek.), however, there was 
on one side a closed ovary filled with ova 1 line in diameter, and 
on the other side a lobate glandular organ, longer than the ovary, 
and exactly resembling the testes of Petromyzon in appearance. As, 
however, no spermatozoids could be detected, even under the micro- 
scope, the occurrence of hermaphroditism in this case is not strictly 
proved, although it certainly seems very probable.—Bericht der 
Akad. der Wiss. in Wien, December 14, 1865, p. 207. 
Annelida and Turbellaria of Guernsey. By E. Ray LANKESTER. 
The following is a list of the species of Annelida and Turbellaria 
obtained by the Dredging-Committee of the British Association last 
summer, off Guernsey and the neighbouring islands. Some of the 
species obtained have yet to be identified. 
TURBELLARIA. 
. Leptoplana subauriculata, Johnston. Firman Bay. 
flexilis, Johnston. Firman Bay. 
. Eurylepta cornuta, Miller. Herm. 
. Convoluta paradoxa, Girsted. Passim. 
. Astemma rufifrons, Girsted. Guernsey. 
A. filiformis, Johnston. Guernsey. 
. Cephalothrix lineatus, Girsted. Guernsey. 
. Tetrastemma yaricolor, Dalyell. Guernsey. 
variegatum, Dalyell. Guernsey. 
10. Borlasia olivacea, Johnston. Guernsey. 
octoculata, Johnston. Guernsey. 
12. Ommatoplea rosea, Miiller. Guernsey. 
CON AOD ON 
13. alba, Thompson. Guernsey. 
14 melanocephala, Johnston. Guernsey. 
15. pulchra, Johnston. Guernsey. 
