86 
MODERN SYSTEM. 
the male be taken away, another will be found in the hole at the next 
recess of the tide. By knowing this fact, an experienced fisherman 
may twice aday take, with little trouble, a vast number of specimens, 
’ after having once discovered their haunts. In the winter they are 
supposed to burrow in the sand, or to retire to the deeper parts ot 
the ocean. They are taken in wicker baskets, resembling mouse- 
traps, or in large nets with open meshes, which are placed at the 
bottom of the ocean and baited with garbage. 
Genus 7. XANTllO. Leach. 
External antenna very short, inserted in the internal corner of the eye; 
internal antenna received in a foveola under the prominent margin 
of the clypeus, the peduncle sublinear: external doublepalpi, with the 
second joint of the internal footstalk, notched at the internal apex : 
shell submargined behind : orbits entire above, below externally with 
one fissure: anterior pair of legs unequal. 
Sp. 1. Xun.florida. Wrists above, with two tubercles : shell on each side 
with four obtuse teeth, the interstices cut out: fingers black. 
Montagu, Trans. Linn. Soc. xi. 85. t. 2. f. t. Cancer incisus. Leach, 
Eil'm. Encycl.v'u. 301. Xantho incisa. Leach, Edin, Encycl. vii. ■] 30. 
Xautho florida. Leach, Trans. Linn. Soc. xi. 320. — Suppl. to Encycl. Brit. 
— Mai. Podoph. Brit. tab. 1 1. 
B. Abdomen in both sexes seven-jointed. Two anterior legs didactyle. 
Division I. Eight hinder legs simple, and alike inform. 
Fam. IV. Pn.uw.\iD 2 E. Leach's MSS. 
Shell anteriorly arcuated, the sides converging to an angle : two anterior 
legs unequal. 
Genus 8. PILUMNUS. Leach. 
External double palpi with the second joint of the internal footstalk 
with the internal apex truncate emarginate : daws simple, with naked 
tips. 
Sp. 1. Pil. hirtellus. Body and legs bristly: shell with five teeth on 
each side: claw somewhat muricatedon the outside. 
Cancer hirtellus. Linn., Penn., leach, Edin. Encyd. Pilumnus hirtellus- 
Leach, Suppl. to Encyd. Brit. Leach , Mai. Podoph. Brit. tab. 12. 
Inhabits the south coast of Devonshire. 
Fain. V. Ocypodaidk. Leach's MSS. 
Shell quadrate or subquadrate : eyes inserted in the front. 
* Shell quadrate. Eyes with a long pedtmcle. 
Genus 9. PINNOTEB.ES. Lutr., Bose, Leach. Ai.ph.kus. Daldorjf ■ 
Antenna, very short (tire first three joints largest), inserted in the into' 
rior corner of the eyes : external double palpi, with the internal foot' 
