FOSSIL STAR-FISffES AND SEA-URCHINS. 



139 



in picturesque confusion. Shepherd's Quarry, near 

 Ludlow, is another good hunting-ground. In some 

 respects, one species, perhaps the most beautiful of 

 the entire group, named after Professor Sedgwick 

 {P. Sedgwickii)^ is allied to the " feather-stars " (or 

 rather to that division represented by Euryale), on 

 account of the peculiar spines on the plates of its 

 arms. This species is found ofily in the older rocks. 



Fig. 116.— Upper Silurian Star-fishes (Ludlow rocks): i and 2. Protastcr Miltoni; 

 2a, small portion of arm magnified, showing plates; 3, Palceocoma Marstoni l 

 4, Palceocoma Colvini. (From Symond's " Records of the Rocks.") 



such as the Caradoc beds at Bala, on the west side of 

 the beautiful lake, and at Underbarrow, in Westmore- 

 land. At Benson's Knot, Docker Park, and other 

 places near Kendal, in Westmoreland, where the 

 upper Ludlow rocks crop out and quarries are opened 

 in them, a student may expect to find Palceasterina 

 primceva^ and Ufaster Ruthvetii, the latter named 

 after one of the most diligent and devoted of amateur 



