WALKING FORESTS. 187 



its fellows by several series of pale bands, forming 

 concentric arcs sub-parallel to each of the four mar- 

 gins of the body. Mr. Yarrell speaks of this as very 

 rare, but I obtained three examples in one day. The 

 Bordered Eay {R. marginata) is another rarity which 

 I have taken here, distinguished by the wide band of 

 dark brown that margins the disk. The Angel ( Sqwa- 

 tina angelus) also sometimes comes up in the drag, a 

 species intermediate between the Bays and the Sharks ; 

 but he is too hideous to dwell upon. 



Some lovely little Nudibranch Mollusca frequently 

 are found clinging to the meshes of the net ; especially 

 one of extraordinary beauty, when examined with a 

 lens, though to the careless eye it appears dull and 

 insignificant. I refer to Mgires punetilucens, a little 

 slug of pale reddish-brown hue, covered with tuber- 

 cles, but studded here and there with black spots, in 

 the centre of which is a speck of most lustrous green 

 •or blue, looking exactly as if a minute sapphire or 

 emerald had been set there. 



But perhaps most characteristic of this particular 

 beat are the Crustacea. Various sorts of Crabs that 

 occur in deeper water are also found here, as the 

 Long-legged Spider-crabs {Stenorhynchus and Ina- 

 chus) ; and the more sluggish sorts, as Pisa, Hyas, 

 and Maia, whose rough shells are frequently so 

 covered with a forest of growing sea-weeds, that, as 

 they crawl and stagger along, they remind one of 

 Birnam wood coming to Dunsinane. The true 

 Shrimps {Crangan), or Sand-raisers, as they are not 

 inappropriately called by the fishermen, are, however, 

 peculiar to the shallow sands. Of this genus we have 



