302 ASELLIDZ. 
wards, rounded and entire, resembling the minute ap- 
pendages existing on the telson of some Stomapod 
crustacea. The outer pair of branchial plates shut 
together in the form of a flattened pear, divided down 
the centre: they cover the greater part of the underside 
of the tail. 
We have but little hesitation in classifying this genus 
with those that Professor Sars and his son have described 
under the name of Isopoda Remagantia, and for which 
Professor Lilljeborg has established the family of Mun- 
nopside, and which are pointed out by Professor Kréyer 
as having an affinity with the genus Munna. The typical 
form of the three posterior pairs of pereiopoda are 
developed into paddle-shaped organs, from which pecu- 
liarity the name of the group was given by Sars. But 
in the progress of his observations he found that others, 
assimilating to the type in most points, had not the 
three hinder pairs of legs so developed: hence, in his 
description of Macrostyles spinifera, he writes of these 
appendages as ‘ Korum struetura ad natandum parum 
apta esse videtur ” (vide Zoological Record, 1864, p. 295). 
The family is also described as containing animals 
having no eyes; but we know that subterranean crustacea 
are generally so, as agreeing with their peculiar habits ; 
but even in these, as far as our experience instructs, 
the organs are preserved, but reduced to a rudimentary 
condition. In the nearly-allied genus Munna, the eyes 
are large, and placed at the extremity of a fixed process. 
But in the other Asellide the organs are less prominent ; 
and in all other respects we see nothing that can induce 
us, with the information that we possess, to separate 
this genus (and we believe also the Jsopoda Remagantia) 
from the Asellide. 
