FOSSIL STAR-FISHES 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 only in the older rocks, 



Fig. 1 16. Upper Siluiian Star-fishes (Ludlow rocks): i and 2. Protaster Miltoni ; 

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

 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 Uraster Ruthveni, the latter named 

 after one of the most diligent and devoted of amateur 



