﻿14 



OPHIURID^ AND ASTROPHYTID^. 



DOUBTFUL SPECIES. 



Ophiura cuspidifera Lamk. 



Astrophyton costosum, costis conicis Linck. 



Astrophyton sculatum, sculo striata Linck. 



Astrophyton scutatum, scuto rotato Linck. 



Stella scolnpendroides granulata Linck. Ophiocoma 



Erste Slernjisch F. Martens. Ophiopholis ? 



Ander Sternfisch F. Martens. Astrophyton ? 



Ophiocoma echinata ? 



GEOGRAPHICAL DISTRIBUTION. 



Despite the great additions to our knowledge of the two families of 

 serpent-stars, we are scarcely yet in a position to do more than hint at 

 the faunal distribution of the species. There is, so to speak, a fauna 

 of the North Atlantic, whereof the extreme hmits are from the Medi- 

 terranean, on the east, to Cape Cod, on the west. The Amphiura squa- 

 inata is found over this whole range ; and even of Ophiopholis beUis I 

 have seen a specimen from Fayal. This last species swarms in all the 

 northern part of this flxunal region, from east to west ; O2ihiogly2oha 

 robusta, 0. Sarsii, and 0. nodosa are common to the two sides of the 

 Atlantic, as well as Opthiocantha spinulosa ; while Ophiothrix rosula, 



