ARTICULATA. 64-1 



hind legs with an ovate pointed termiualiou. luhab.ts the European 

 seHS. 



Portumnus variegatus.— The Variegated Portumnus. Plate Ixxxii. tig^. 

 11. With obscure granulations and five teeth on either side, the second 

 and third rather obsolete ; three teeth in front, and tlie wrists with one in- 

 ternal tooth. Inhabits the British seas. 



Corystes dentata. — Tlio Toothed Corystes. Plate Ixxxii. fig. 12. Graiiii- 

 lated and crenated behind ; with a bifid front, and the sides with three teelh. 

 Inhabits the coasts of Britain. 



Eury')iome aspera. — Ihe Rough Eurynome. Plate Ixxxiii. fig. 1. Back 

 with eight tubercles more prominent than the rest, with hairy margins ; 

 and the sides with four lamellae ; anterior legs and thighs with tubercles. 

 Inhabits the British seas. 



Ilyas araneus. — The Sand Hyas. Plate Ixxxiii. fig. 2. Pointed in front, 

 widening towards tlie posterior parts, covered with small tubercles ; legs 

 very long, the forcep claws thicker and shorter than the others. Inhabits 

 the coasts of Britain. 



Remipes iestudinarius.— The Tortoise Remipes. Plate Ixxxiii. fig. 5. 

 Oblong-ovate; provided with a long tail; with scaly wrinkles, and tlie 

 whole members finely crenated; five teeth before, of which the inter, 

 mediate three are shorter than the lateral ones. Inliabits the coasts of New 

 Holland. 



Pagurus Bernhardus. — The Bernhardine Pagurus. Plate Ixxxiii. fig. i. 

 With muricated and shagreened forceps, the right one longer and larger 

 than the left ; second and third pairs of feet spinous at the extremity. A 

 native of the coasts of Britain, inhabiting various species of Bivalve shells, 

 such as turbos, trochi, &c. 



Nephrops Norvegicus. — The Norwegian Nephrops. Plate Ixxxiii. fig. 3. 

 Described, vol. iv. p. 8. 



Astacus fluviatilis. — The Freshwater Astacus, or Craw-Fish. Plate 

 Ixxxiii. fig. 8. Described, vol. iv. p. 9. 



Ciangon vulgaris. — The Common Crangon, or Shrimp. Plate Ixxxiii. fig. 

 10. Described, vol. iv. p. 8. 



Nebalia Herbstii. — Herbst's Nebalia. Plate Ixxxiv. fig. 2. Ash-coloured, 

 with black eyes. One inch long. Inhabits the European seas. 



ORDER II. — STOJIAPODA. 



The head is large, and distinct from the trunk, and consists of two parts ; 

 the branchiae are in the form of plumes or tufts, adhering to the lower ap. 

 pendages of the post-abdomen; intermediate antenna with a filamentous 

 termination ; shell membranaceous ; six posterior feet filiform ; extremity 

 of the body provided with a foliaceous fin. 



This order contains four genera. 



ORDER III. LJEMODIPODA. 



Head, and first segment of the trunk not distinctly divided ; with four se- 

 taceous antennae, having many articulations ; second and third segment 

 provided below with vescicular bodies, supposed to be the organs of respi- 

 ration. 



It contains four genera. 



