NATURAL HISTORY. 
ehanging their habitations from smaller to larger 
shells as they increase in growth. The abdomen 
and tail is naked and tender, the latter is fur- 
nished with one or more hooks to enable the 
animal to secure itself in its habitation; they move 
about with considerable facility. 
PALINURUS. Vuta@aris. Malac. Podopth. 
t. 30. Brit. Zool. 4. t. 11. f. 22. (Astacus 
Homarvs.) The Sea Cray Fish or Horny 
Lobster, 
The Palinuri live on fish and other marine animals, 
—they have the power of producing a loud noise 
by rubbing the first joints of the exterior antennz 
against the projecting clypeas. 
PORCELLANA. Puatycuetes. (Latr.) Brit. 
Zool, 4, t.6. f. 12. (Cancer PLaTYCHELEs.) 
On the rocky parts of the coast—of a rounded 
form about the size of a horse bean adhering 
closely to the stones under which it lurks. 
GALATEA. 1. Spinirera. Malac. Podopth. 
t. 28. B. Brit. Zool. 4, t. 14, f. 26. (Asracus 
Srriaosus.) Under stones at low tide on most 
of the recky parts of the coast, 
2. G. Squamirera. Malac. Podopth, t. 28, A. 
In similar situations with the last. 
GEBIA. 1. De.raura. Malac. Podopth. t. 
21. f. 9. 10. On the southern coast of Devon. 
2. G. Mertrata. Malac. Podopth. t. 31. 
f.1.—8. Inhabits with the last—both species 
are found under the mud at very low tides in 
which they make long winding horizontal 
