CLASS I. CRUSTACEA. 89 



Subdivision 3. — Finga's not dcjiexcd. External antenna: mth their- first 

 joint simple. Anterior pair of legs scarceli/ t/iieker than the others, zc/iich 

 are rnoderately long. 



Genus 13. MAJA. Lam., Lafr., Base, Leach. 



External antenna with the two first joints thiclvcst, and of nearly equal 

 length : shell con\e\ ovate-subtriangular, very spiny : ei/es not thicker 

 than their elongate peduncle : external double palpi with the second 

 joint of their internal footstalk deeply notched at its internal apex : 

 claws with naked sharp points. 



Sp. 1. M'jj. Sqninado. Shell fasciculate-pilose; orbit above, with our 

 spine ; the sides with five strong spines : clypeus beneath the front 

 with a short spine excavated above. 



Cancer Squinado. Herhst, iii. t. 56. (full grown.) Id.'i. t. 11. f. 85. 84. 

 junior. Cancer Maja. Scopoli Entoni. Cam. 112(3. Sowerhfs Brit. Mis- 

 cell, t. 39. Maja Squinado. Latr. Gen. Crust, et Insect, i. 37. Bosc, 

 Hist. Nat. des Crust, i. 257. Leach, Edin. Encycl. vii. 394. 431. 

 — Trans. Linn. Soc. xi. 32(3. — Supp. to Encycl. Brit. i. 415. — Malac. 

 Podoph. Brit. tab. 18. 



Inhabits the southern coasts of Devon and Coinwall. By the fishermen 

 it is named Thornback or King-crab. 



Subdivision 4. — Fingers not dcjlcxed. Extovjal antenna with the first 

 joint externally dilated. 



Genvis 14. IIYAS. Leach, Supp. to Encycl. Brit. i. 415. 

 Shell elongate-sublriangular, subtuberculated; the sides behind the 



eyes produced into a lanceolate projection : roslrtun fissured, the la- 



cinia? approximating: external antennee with the first joint dilated, 



larger than the second: external double palpi \\\\h. the second joint 



emarginate at the internal apex. 

 Sp. 1. Hyus araneus. The lastiform process behind the eyes tidjerculalcd 



behind. 

 Cancer araneus. Linn. Syst. Nat. 1044. Cancer Bufo. Ilerbst, i. 142. 



if. 17. _/'. 59. Ilyas araneus. Leach, Edin. E?icycl. vii. 437. — Trans. 



Linn. Soc. xi. 329. — Mai. Podoph. Brit. tab. 9.1. a. 

 Inhabits the Scottish sea in great plenty; on the English coast it is 



more rare. 



Subdivision 5 . — Second, third, fourth, and fifth pair of legs alike and slender. 



Genus 15. INACHUS. Fabr., Leach. 

 Shell slightly spined, with a spine on each side protecting the eye when 

 retracted : eyes distant, scarcely thicker than their peduncles : exter- 

 nal double palpi with the second joint of the internal footstalk trun- 

 cate at its internal point: external anfeiina with the three first joints 



