LiEM ARGUS. 
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Gen. 178. CECROPS, Leach. 
Plate-like appendage small and rounded. The male has 
all the feet, and the female only the first three pair, adapted 
for walking, and armed at the tips with short, stout spines. 
The oviferous tubes are very long and slender, and are 
twisted on each other in numerous loops, and lie concealed 
in the hollow space between the abdomen and the large, 
buckler-shaped, last segment of the thorax. 
Cecrops Latreillii, Leach.— Of a pale horn-colour ; 
front edge of carapace deeply notched ; the plate-like ap- 
pendage and last thoracic segment of the body less deeply 
notched ; hooks at end of foot-jaws deep black. Length of 
female, an inch ; of male, about the third of an inch. 
Pound on the gills of the sunfish, occasionally caught on 
the coasts of England and Ireland. 
Gen. 179. LiEMARGUS, Kroyer . * 
Plate-like appendage of considerable size ; the feet are all 
foliaceous and branchial ; upper segments of thorax distinct 
and small; males, as in last genus, much smaller than the 
females. 
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