88 
MODERN SYSTEM. 
Division II. — Shell rostrated in front. Eight hinder legs alike, and simple. 
Pam. VI. — Maude, Leach. 
Subdivision 1 . — F ingers dejlexed. 
Genus 11. EURYNOME. Leach. 
External antenna rather long, with the first joint shorter than the se- 
cond: shell verrucated, anteriorly terminated by a bifid rostrum with 
divaricating lacini® : eyes distant, thicker than their peduncle which 
isoi moderate length : external double palpi with tire interior point of 
the second joint ol their internal footstalks truncate-emarginate : an- 
terior legs equal ; of the male, three limes the length of the body ; of 
t he female, longer than the body. 
Sp. 1. Eur.aspera. Anterior legs and thighs tubereulated : shell with 
eight tubercles oil the hack that are more elevated than the others, 
which are irregular and margined with hairs; thesides with four la- 
mellte; rostrum with simple acuminate lacinke. 
Cancer aspera. Venn. Brit. Zool. iv. 8. Eurynome aspera. Leach, Edin. 
Encycl. vii. 431. — Malac. Vodpph. Brit. tab. 17. — Trans. Linn. Soc. xi. 
326. 
Inhabits the British seas. 
Subdivision 2. — Fingers not dejlexed. External antenna zeith the first 
joint simple. Anterior pair of legs distinctly thicker than the rest. 
Genus 12. PISA. Leach. Blastcs. Leach, Edin. Encycl. 
External antennte with clubbed hairs, the first joint longer than the se- 
cond : external double palpi with the second joint of the internal foot- 
stalk with its internal apex truncate or emarginate : claws internally 
denticulated: shell villose; the lacini® of the rostrum divaricating: 
orbits behind with two, below with one fissure. 
* Shell densely villose, the sides on each side behind terminated with 
a spine. 
Sp. 1. Pisa Gibbsii. Rostrum descending: shell with a spine behind 
the eyes on each side ; arms and thighs simple. 
Cancer biaculeatus. Montagu, Trans. Linn. Soc. xi. 2. t. 1. f. 1. Pisa 
biaculeata. Leach, Edin. Encycl. vii. 431. Pisa Gibbsii. Leach, 
Linn. Trans, xi. 327. — Mai. 1'odoph. Brit. tab. 19. 
Inhabits deep waters on the coasts of Devon and Cornwall, 
** Shell villose, with spiny sides. 
Sp. 2 . Visa telraodon. Shell on each side with six spines; two small, 
the rest larger. 
Cancer tetraodon. Penn. Brit. Zool. iv. 7. t. 8./ 15. Maja tetraodon- 
Bose, Hist. Nat. des Crust. 1. 254. Blastus tetraodon. Leach, Edin. 
Encycl. vii. 431 . Pisa tetraodon. Lje.uch, Trans. Linn. Soc. — Supp, to 
Encycl. Brit. i. 415. — Mai. Podoph. Brit. tab. 20. 
Inhabits the south-west coast of England, 
