specimen five rays. Eularged fourteen times. From the Lower Carboniferous 



at Law Quarry, Dairy, Ayrshire 209 



Figs. 7, 7 a-7 g. Dory derma Dairy ense, Hinde. Detached spicules of various forms. 

 Enlarged twenty-eight times. Figs. / and g are from the Carboniferous at 

 Ben Bulbul, near Sligo ; the others are from the Law Quarry, Dairy .... 210 



Fig. 8. Sporadopyle Santanderi, Hinde. Natural size. From the Neocoraian at Santander, 



Spain 210 



Fi"-. 8 a. The same. A fragment of the dermal layer of the same specimen, enlarged sixty 

 times, showing the interior spicular canals. Drawn under the camera lucida. 



Figs. 8 b, c, d. The same. Fragments of the interior spicular mesh, showing the canals. 

 Fi". 8i is enlarged twenty-eight times, 8 c and d sixty times. 



