90 MODERN SYSTEM. 



thickest : second pai?' of legs thicker than tlie following ones : claws I 

 curved. 



Sp. 1. In.Dorsettensis. Beak short, emarginate; the clypeus beneath 

 produced into a spine: shell anteriorly, with four little tubercles I 

 placed transversely ; then with three spines, the anterior one strong- 

 est; behind with three strong sharp spines, the middle one gene- , 

 rally longest and strongest, forming a slightly rccur\ed line ; hinder |l 

 margin with two distinct obsolete tubercles. 



Cancer Dorsettensis. Penn. Brit. Zool. iv. 8. pi. 9. Jig. 18. Cancer 

 Scorpio. Fab?'. Sp. lust. i. 504. Gmel. Si/st. Nat. i. 20r8. Herhsf, i. 

 237. 130. Inachus Scorpio. Fabr. Ent. Syst. Snpp. 358. Macropus 

 Scorpie. Lutr. Hist. Nat. des Crust, et des Insect, vi. lOP. Maja Scor- 

 pio. Base, Hist. Nat. des Crust, i. 252. Tnachus Dorsettensis. Lcfich, 

 Eclin. Encycl.vii .431. — Malac. Fodopli. Brit. tab. '22. Jig. 1 — 6. — Trans. 

 Linn. Soc. xi. 330. 



Inhabits the British seas. 



C. Abdomen in both se.res six-jointed. Tuo anterior legs didaeti/le. 



Fam. VII. LirnoDiAD.t. Xcac/i's J\ISS. 

 Fifth pair of legs minute, spurious. 



Genus 16. LITIIODES. iMtreiUe, Leach. 



External double palpi with narrow cylindric footstalks : ei/es approximat- 

 ing at their base: s/*c// very spiny, anteriorly rostrated. 



Sp. 1. Lith. Maja. Legs and shell with sharp spines: beak spiny, with 

 the tip bifurcate: fingers with tufts of hair. 



Cancer Maja. Linn. Syst. Nat. 1016. Cancer horridus. Penn. Brit. Zool. i\. 

 7. pi. 7. Jig. 14. Inachus Maja. Fabr. Ent. Syst. Supp. 358. Maja 

 vulgaris. Bosc, Hist. Nat. desCi-ust. i. 251. Lithodes arctica. iMfr. 

 Gen. Crust, et Insect, i. 10. Lithodes ihija. Leach, Edin. Eucycl.vu. 

 395. — Trans. Linn. Soc. xi. 332. — Supp. to Encycl. Brit. i. 416. — Mai. 

 Podoph. Brit. tab. 24. 



Inhabits tlie Northern sea, and in our seas is very rare, or at least very 

 local ; occurring only on the rocky shores of Yorkshire and of Scot- 

 land. 



Fam. VIII. Macroi'odi.id.e. 



Second, third, fourth, and fifth pair of legs alike and slender. Eyes not 

 retractile. 



Genus 17. MACROPODIA. Leach. M.\CROprs. Latr. 



Shell slightly spined ; beak long and fissured : eyes distant, subreniform, 



much thicker than their peduncles: external antcuuic half the length 



of the body; the second joint tlu-ee times the length of the tliird: 



external double palpi slender ; tlie internal footstalk with the two equal 



