PLATE XXIX. 



LOWER SILURIAN (CARADOC). 



Fig. 1 . Stygina ? Musheni, Salter. Boulder (probably of Caradoc), from the 



(P. 174.) Drift, Biiildwas, Shropshire. (Brit. Mus.) 



Figs. .2 — 6. lUanus {III.) Bosendergn,'EiCRW alb? From the Coniston or Bala lime- 

 (P. 199.) stone of Coniston and Troutbeck. (Except 



fig. 5, which is Mr. Wyatt-Edgell's specimen, 

 all are in the Woodwardian Museum.) Figs. 

 2, 3, 4, are figured in Prof. Sedgwick's 

 ' Synopsis,' and show the sculpture well. 

 Figs. 7 — 9. {lllcBms?) ocularis, Salter. 7, Side view of head; 8, head, nat. 



(P. 198.) size ; 8 a, magnified ; 8 h, sculpture enlarged. 



Caradoc or Bala limestone, Chair of 

 Kildare. (Mus. P. Geol.) 



9. „ ,, ? A larger fragment of the side of the head, 



probably the same species. Same Locality 

 and Museum. 



Figs. 10 — IG. ///. {lUanus) Davisii, Salter. Caradoc or Bala limestone. 

 (P. 194.) 



10. „ ,, The finest known. Figured in the Wood- 



wardian * Synopsis' by M'Coy and Salter. 

 (Woodw. Mus., Cambridge.) 



11. „ „ Ordinary form at Rhiwlas, Bala. (Mus. P. 



Geol.) 



12,13. „ „ Restored figure, from Decade 2, Geol. Survey. 



14. „ „ Epistome or rostral shield. (Mus. P. Geol.) 



15- „ „ Side view. Same locality and cabinet. 



16. „ „ Young tail, from Mr. Wyatt-Edgell's cabinet, 



showing a nearly complete axis. 



