THE STRAIT OF MAGELLAN. 99 



same colour, were lying stranded ; as also some specimens of 

 a sand-burrowing crab of the family Corystidce, the Peltarion 

 spinulosum, which was afterwards met with in various other 

 localities to the eastward, though nowhere so abundantly as 

 about Punta Arenas ; and the examination of the rounded 

 stones left uncovered by the retiring tide yielded us specimens 

 of some additional marine animals, including a few Annelids, 

 a large limpet (Patella Magellanica) , a small Sijphonaria, and 

 an odd little flat-backed crab, the Halicarcinus planatus, 

 which is very abundant throughout the Strait, and also at the 

 Falkland Islands. 



