PLATE XIV. 



Fig. Page. 



1 . Platanastcr ordovicus, n. sp. ; photograph of the apical surface, nat. size. 



— Upper Ordovician (Caradocian) ; Cound, Madeley, Salop. Museum 



of Practical Geology, Jermyn St., no. 8238. 171. 



2. Ditto ; photograph of the oral surface of the counterpart of the same 



specimen, nat. size. Museum of Practical Geology, Jermyn St., 



no. 25347. 171. 



3. Ditto ; photograph of a portion of oral surface of the arm of the same 



specimen, X 4. 1 71 . 



4. PalasteriscuH devonicus (Stiirtz) ; photograph of the apical surface, two- 



thirds nat. size. — Lower Devonian ; Bundenbach, Germany. British 

 Museum (Nat. Hist,), no. E. 5026. 170. 



5. Schuchertia wenlocki, n. sp. ; photograph of the oral surface, X 2. — 



Middle Silurian (Wenlock) ; Gutterford Burn, Pentland Hills. 

 Royal Scottish Museum, no. 32/485. 215. 



6. Ditto; photograph of a portion of the oral surface of another individual, 



X 2.— Ibid. Royal Scottish Museum, no. 32 I S4. 21-'.. 



M. = madreporite; M.P. = mouth-angle plate. 



