102 GLAUCUS ; OR, 



will be a fine menagerie of N'ereus, if we can but 

 turn it. 



Now, the crowbar is well under it; heave, and 

 with a will ; and so, after five minutes' tugging, 

 propping, slipping, and splashing, the boulder gra- 

 dually tips over, and we rush greedily upon the spoil. 



A muddy dripping surface it is, truly, full of 

 cracks and hollows, uninviting enough at first sight : 

 let us look it round leisurely, to see if there are not 

 materials enough there for an hour's lecture. 



The first object which strikes the eye is pro- 

 bably a group of milk-white slugs, from two to six 

 inches long, cuddling snugly together (Plate IX. 

 fig. 1). You try to pull them off, and find that they 

 give you some trouble, such a firm hold have the 

 delicate white sucking arms, which fringe each of 

 their five edges. You see at the head nothing 

 but a yellow dimple ; for eating and breathing are 

 suspended till the return of tide ; but once settled 

 in a jar of salt-water, each will protrude a large 

 chocolate-coloured head, tipped with a ring of ten 

 feathery gills, looking very much like a head of 



