144 A HISTORY OF RECENT CRUSTACEA 
that of the entire leg. These claws are very thin, and are 
serrated with the finest teeth, directed backwards: their 
curved extremities are flattened, and on this part five most 
minute cups are placed which seem to act in the same 
manner as the suckers on the arms of the cuttle-fish. As 
the animal lives in the open sea, and probably wants a 
place of rest, I suppose this beautiful and most anomalous 
structure is adapted to take hold of floating marine 
animals.’ 
Iyreidus, de Haan, 1841, has the eye-stalks short and 
the orbits are ill-defined, which is contrary to the family 
character. The genus was originally instituted for Lyrei- 
dus tridentatus, the lyre-shaped crab of Japan. ‘That 
species has been traced southwards to Australia; another 
species, Lyreidus Bairdi, 8. I. Smith, has been found off 
the east coast of the United States. 
Zanclifer, Henderson, 1888, has the eyes rudimentary, 
with cornez of small size though 
pigmented, on short peduncles, 
in ill-defined orbits. The first 
antenne are small, completely 
concealed by the massive pedun- 
cles of the second pair, which meet 
together inthe middle line. The 
name means sickle-bearing, in 
allusion to the uncinate character 
of the terminal joint in the walk- 
ing-legs. There is at present only 
one species, Zanclifer caribencis 
(de Freminville), and of this only 
two specimens are known. One 
Fe ein Hondecon| Of: these, the figure of “which 16 
here reproduced, was obtained. by 
the Challenger off the coast of Brazil, the other was taken 
more than forty years earlier by M. de Freminville in the 
Caribbean Sea. The French captain described it under 
the name of Eryon caribensis, thus referring it to a fossil 
genus with which it has nothing to do, and making im- 
portant mistakes in the description which were pointed 
