CRUSTACEA. 
161 
the external division much flattened, lanceolate, and with hairs 
having spiked bases and serrated tips on the outer edge ; the 
hairs also occur generally along the inner margin, and are 
frequently sheathed in mud and particles of all kinds. The 
third pair consists of three portions furnished with long branched 
hairs. The fourth pair has the large flat shield surrounded 
with branched hairs ; next is a curved tapering portion with 
bristles having short spikes towards the tip; then come 
a series of flattened organs with truncate tips covered with 
spiked hairs. The fifth pair has three divisions—an inner 
irregular portion with hairs shortly branched on its free 
edge, a middle and somewhat club-shaped piece with rather 
stiff serrated hairs scantily spiked at the base, and a 
curiously curved and rather slender inner portion with 
about half a dozen finely serrated hairs on one side of 
its tip. 
The hairs on the outer border of the chelae are densely 
plumose; and hence it is exceedingly difficult to clean them 
from mud and sand for the cabinet. 
Porcellana longicornis , L.; Bell, op. cit. p. 193. 
As common as the former, in similar, though not muddy, 
situations. The embryos are found in the ova in August; 
and many young occur under stones in November and 
December. 
Fam. Lithodida. 
Genus Lithodes, Latr. 
Lithodes maia ) L.; Bell, op. cit. p. 165. 
Not uncommon in deep water, whence it is brought by the 
fishing-boats. 
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