>5 8 



Mr. Ray to Dr. Robinfon. 



WHAT you write of the PeEtunculites found in 

 England , I grant to be true, in comparifon 

 with any Peftunculi commonly known but there may 

 be fuch Species found in our Seas which do not ap- 

 pear^ but lye among Rocks, or in great Depths. And 

 that this is not a mere Subterfuge^ and altogether gra- 

 tis diftum^ I will give you an initance of a teflaceous 

 Fifei that is the Echinus marinus^ three or four where- 

 of Mr. Willughby and my felf found, and took up a~ 

 live in the Sea , among the Rocks between the IJle 

 and Calf of Man\ of that kind and bignefs, as I ne- 

 ver heard before to have been found caft upon our 

 Shores, or drawn out of the Sea by our Fifhermen j 

 they were as big as both my Fifts. I have feen of 

 them in Italy. 



You muft excufe me if I think the Nautili Shells, 

 that are frequent in Mufeums^ are entire Shells , and 

 not broken pieces j for in fuch as I have feen there is 

 no appearance of any frafture, and the enormous wide- 

 nefs of the Mouth argues it- not to be broken : And 

 befides, I my felf have taken up on the Shores of the 

 Mediterranean fmall Nautilus-Shells of the ftriate kind 

 entire, which for the fhape and turn were like to the 

 common great Nautilus-Shells. 



How the Cetaceous Fijhgs raife^fink^ and poife them- 

 felves in the Water, is, I think, clear enough, and 

 the Dolphin, you know, is of that kind 5 and for the 

 other Fifh you mention out of Francifco Redi^ the 

 Centrina^ Skate and Torpedo are Cartilagirieous. Of 

 the reft I do not find mention in my Notes .of any 

 fwimming Bladder they had , excepting the Uranof- 



copus % 



