1897 - 98 .] Prof. D’Arcy W. Thompson on Marine Faunas. 345 
lolanthe acanthonotus, F. E. B. South of Kerguelen. 
The single species of its genus. 
MuNNIDiE. 
Munna pallida, F. E. B. Kerguelen. 
M. maculata , F. E. B. Kerguelen. 
Besides the northern species of the genus, Chilton has described 
M. Neozealanica from New Zealand. 
Pleurogonium albidum , F. E. B., and 
P. serratum , F. E. B., 
are each described from a single specimen from Kerguelen. 
There is another species from Tristan d’Acunha, and three 
more from the North Atlantic. 
Astrurus crucicauda, F. E. B., and 
Neasellus Jcerguelenensis, F. E. B. 
The single species of their genera, as yet known only from Ker- 
guelen. 
Desmosomidjj. 
Ischnosoma bacillus , F. E. B. Lat. 50° S., south-west of Mel- 
bourne. 
Other species, all from deep water, come from Valparaiso, the 
Azores, the North Pacific, Norway, and the Arctic Ocean. 
MlJNNOPSIDiE. 
Munnopsis australis , F. E. B. Crozets. 
Beddard describes a species from New Zealand, and another 
doubtfully appertaining to the same genus from Japan. Hansen 
has one also from the German Plankton Expedition ; hut, according 
both to Stebbing ( Crustacea , p. 384) and to Sars ( Isopoda,Noncay , 
p. 133), it is questionable whether any of these species really 
belong to the same genus as M. typica , the North Atlantic 
form. 
I. quadrispinosa, Beddard, from Kerguelen, is, according to 
Sars, markedly different from the North Atlantic Ilyarachna, 
and is more properly to be regarded as the type of a separate 
genus ( Isopoda of Norway , p. 135). 
2 / 99 . 
YOL. XXII. 
Z 
