JUNE, 1882. 191 



and you will observe that, although fixed to the shell of 

 the mussel by a strong muscular attachment, beyond 

 their power of voluntary removal, yet they revolve upon 

 it in the most curious fashion, half forcing one to look 

 for eyes, so serpent-head like dotheyappear as they revolve. 

 These are really finely-grown specimens, far beyond any- 

 thing we have in our own loch, yet they are affixed to 

 and have reached maturity upon living Modiolce of a very 

 moderate size compared with those to be found at a 

 fathom or two in the laminarian zone. This is surely 

 proof enough that the large mussel is better suited for 

 shallow water, while the Terebratulce are clearly better 

 grown in the depths. This is evidently the case with 

 various other species, and we go on passing the material 

 through our hands, now tumbling two varieties of 

 Holothuritz into water, now chucking little bits of sticks, 

 with remote resemblance to crustaceans, into other recep- 

 tacles, until what with hermit crabs with beautiful green 

 eyes and jackets like boiled partans, and large Porcellani 

 crabs, Munida rugosa, mixed up with fragments of 

 mutilated Norwegian lobsters, Nephrops Norvegicus, our 

 receptacles are getting filled with a motley collection. 

 The sea urchins are represented by large fellows, bigger 

 than the fist, but still inferior to those we have taken in 

 shallow water; and the little curious flat creatures, scarcely 

 larger round than peas, with mouth and vent on same 

 side and the spines only observable with the lens, 

 Echinocyamus pitsillus, are they not called, with the 

 customary contrariness of naturalists, whose nomenclature 

 increases at an inverse ratio to the size of the creature 

 named. 



As we come to examine the contents of our jars, we 

 find that the little stick-like, or rather straw-like, 



