THE OBJECT OF LARGE OVA yed 
clesely allied species. In 1882 he had explained that 
Bell’s Munida Rondeletit was distinguished from the other 
species by its very small eyes, not furnished with a circlet 
of hairs, and by the complete want of the two dorsal 
spines on the third pleon-segment. But Bell gives an- 
other specific character, ‘ second and third segments of the 
abdomen, the former with six, the latter with four small 
spines on the anterior margin; the other segments with- 
out spines.’ In two specimens from the Clyde, both having 
circlets of hairs to the eyes, the pleon has on successive 
segments, in one case, six, four, and two spines, but in the 
other six and four and none. 
Grimothea, Leach, 1820, established to receive the 
Galathea gregaria of Fabricius, is still in an uncertain 
position, it beimg supposed by some that the species is a 
young form of Munida subrugosa, Dana. 
Munidopsis, Whiteaves, 1874, has eyes devoid of pig- 
ment, and the stalk of the eye frequently prolonged beyond 
the cornea in the form of a spine or spines. ‘The species 
are found in depths varying from 100 to more than 2,000 
fathoms. ‘It is probable, Dr. Henderson remarks, ‘ that 
the loss of sight is compensated by a greater development 
of the tactile sense, and in some species this is evidenced 
by the great length of the antennal flagella, which in all 
probability enable the animal to grope its way about on 
the bottom.’ The eggs are few and large, as is often 
the case with the ova of deep-water species, which are 
supposed to find their advantage in passing through 
several of their metamorphoses within the egg, so that 
the young one is hatched in a form nearly like that of the 
parent. 
Humunida, 8. 1. Smith, 1883, occupies an exceptional 
position, for the peduncle of the second antenne has five 
distinct joints, the third maxillipeds are without the usual 
two pairs of rudimentary arthrobranchize, and the pleon 
of the male is without app-ndages on the first five seg- 
ments. The type species, Humunida picta, Smith, was 
taken in the North Atlantic. 
Uroptychus, Henderson, 1888, is the equivalent of 
