101 MODERN SYSTEM. 



** Tail uith the superior double styles, having the style processet 

 snhequal. 

 Sp. 3. Gam. Locusta. Ei/es lunate. 

 Cancer Gummarus I.ocusta. JMoutagn, Trans. Linn. Sor. ix. 92. Gara- 



inarus Locusta. Leach, Edin. Encycl.xn. 403. — Trans. Linn. Soc. xi. 



359. — Siipp. to Encycl. Brit. i. 42j. 

 Inhabits the British sea. 

 Sp. 4. Gam. Camptolops. Eyes flexuous. 

 Gammarus Camptolo[)S. Leach, Edin. Encycl. vii. 403. — Trans. Linn^ 



S'K. xi. 3(30. — Sapp. to Encycl. Brit. i. 4'2.5. 

 Inhabits the sea al)out Loch Rauza, in the Isle of Arran. 



Genus 9. AMPITHOE. Leach. 



Superior antenna with no seta at the base of their fourth joint: tail 

 simple above : hands ovate. 



Sp. 1. Am. ruhricata. 



Cancer Gammarus rubricatus. Montagu, Trans. Linn. Soc. ix. 99. Gam- 

 marus rubricatus. Leach, Edin. Encycl. vii. 402. Ampithiie rubri- 

 cata. Leach, Edin. Encycl. vii. 432. — Trans. Linn. Soc. \i. 360. — r 

 Supp. to Encycl. Brit. i. 425. 



Inhabits the sea of the southern coast of Devon. 



Genus 10. PHERUSA. Leach. 



Superior antennae with no seta at the base of their fourth joint : tail sim- 

 ple above : hands filiform. 



Sp. 1. Phe. Fucicola. Testaceous-cinereous or gray cinereous mottled 

 with reddish. 



Pherusa Fucicola. Leach, Edin. Encycl. vii. -132. r:— Trans. Liyin.Soc. xi. 

 360. — Supp. to Encycl. Brit. i. 426. pi. 21. 



Inhabits fuci on the southern coast of Devon. 



Stirps4. ^nYcnn^ four-jointed; under ones longest, leg-shaped. (Four, 

 anterior legs monodactyle.) 



Subdivision 1. — Second pair of legs with a large hand. 



Genus 11. PODOCERUS. Leach. 

 Eyes prominent : four anterior legs monodactyle. 



Sp. 1. Pod. variegatus. Body varied with red and white. 



Podocerus variegatus. Leach, Edin. Encycl. vii. 433. — Trans. Linn. 

 Soc. xi. 361. — Supp. to Encycl. Brit. i. 426. 



Inhabits the southern coast of Devonshire, amongst confervae and co- 

 rallines. 



Genus 12. JASSA. Leach. 

 jPyes not ])romincnt: Jour anterior legs monodactyle, with oval hand»^ 

 second pair with its internal edge dentated. 



