CLASS I. CRUSTACEA. 89 



Subdivision 3. — Fingers not defiexed. External antenna irith their first 

 joint simple. Anterior pair of legs scarcely thiehcr than the others, uhick 

 are rnoderatelj/ long. 



Genus 13. MAJA. lyim., TMtr., Bosc, Teach. 



External antennee \vith the two first joints tliickest, and of nearly cqiial 

 length : shell convex ovate-subtriangiilar, very spiny : ej/es not thicker 

 than their elongate peduncle : external double palpi with the second 

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

 clazes with naked sharp points. 



Sp. 1. MaJ. Sqninado. Shell fasciculate-pilose; orbit above, with one 

 spine; the sides vv'ith five strong spines: clypeus beneath the front 

 with a short spine excavated above. 



('uncer Sqninado. Herbst, iii. t. 56. (full grown.) Id.\. t. 14./. 83. 84. 

 junior. Cancer Maja. Scopoli Entom. Cam. 1126. Sozcerbi/'s Brit. Mis- 

 cell. t.39. ]\Iaja Sqninado. Lutr. Gen. Cnist. ct Insect, i. 37. Bosc, 

 Jlist. Nat. dcs Crust, i. 237. Leach, Edin. Encj/cl. vii. 394. 431. 

 — Trans. Linn. Soc. xi. 326. — Supp. to Enci/cl. Brit. i. 415. — Malac. 

 Podoph. Brit. tab. 18. 



Iidiabits the southern coasts of Devon and Cornwall. By the fishermea 

 it is named Thornback or King-crab. 



Subdivision 4.-»-Fiw£'ers no/ deflexed. External antenna with tlte first 



joint externally dilated. 



Genus It. TIYAS. Lcacli, Supp. to Encycl. Brit. i. 415. 



i^hdl elongatc-subtriangular, subtubcrcidated ; the sides behind thR 

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

 cinijE approximating : external antenna with the first joint dilated, 

 larger than the second: external double palpi yiixh the second joint 

 cmarginate at the internal apex. 



Sp. 1. Hyas aruneus. The lastiform process behind the eyes tuberculated 

 behind. 



Cancer arancus. Linn. Sysf. Kaf. 1044. Cancer Bufo. Herbst, i. 142. 

 t. 17. f. 59. Ilyas araneus. Leach, Edin. Encycl. vii. 437. — Trans. 

 Linn. Soc. xi. 329.— Mai. Podoph. Brit. fab. 21. a. 



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

 more rare. 



Subdivision 5. — Second, third, fomth, andfifihpair of legs alike and slender. 



Genus 15. INACTIUS. Fair., 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 antenna with the three first joints 



