BO MODERN SYSTEM. 



thickest: second pair of legs thicker than the following ones: cbm)$ 

 curved. 



Sp. 1. Li. Dorsettensh. Beak short, emarginate ; the clypeus beneath 

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

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

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

 rally longest and strongest, forming a slightly recurved line; hinder 

 margin with two distinct obsolete tubercles. 



Cancer Dorsettensis. Peim. Jhif. Zonl.'w. 8. pl.O.fg. IR. Cancer 

 Scorpio. Fahr. Sp. Inst. i. 504. Cmel. Si/st. Nnt. i. 2078. Hetbst, i. 

 237. 130. Inachus Scorpio. Fabr. Ent. Si/st. Supp. 358. Macropus 

 Scorpie. Lair. Hist. Nat. des Crust, ct des Insect, vi. 109. Maja Scor- 

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

 Edin. Enct/cl.vn .iSl.—Malac. Podoph. Bril. lab. '22. fg. 1—0.— Trans. 

 Linn. Soc. xi. 330. 



Inhabits the British seas. 



C. Abdomen in both sexes six-jointed. Two anterior legs didacti/le. 



Fam. VII. LiTHODiADx. Leach's MSS. 

 Fifth pair of legs minute, spurious. 



Genus 16. LITIIODES. Latreille, Leach. 



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

 ing at their base : shell 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. Si/st. Nat. 104C. Cancer horridus. Penn. Brit.Zool.iv. 

 7. pi. 7. fig. 14. inachus Maja. Fabr. Ent. Si/st. Supp. 358. Maja 

 vulgaris. Bo.ic, Hist. Nat. des Crust, i. 251. Lithodts arctica. Latr. 

 Gen. Crust, et Insect, i. 40. Lithodes Maja. Leach, Edin. Encycl.vn. 

 Qg^^^Trans. Linn. Soc. xi. 332.— Supp. to Encycl. Brit. i. iW.—Ma/. 

 Podoph. Brit. tab. 24. 



Inhabits the 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. Macropodiad.'e. 



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

 retractile. 



Genus 17. MACROPODIA. Leach. Maciiopus. T^itr. 



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

 much thicker than their peduncles : external antcnme half the length 

 of the body; the second joint three times the length of the third: 

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



