44 TR1L0BITES OF THE C03ILEY BRECCIA-BED. [March I9I3, 



Fig. 8. External cast of hypostoma [1814] ; X 2. 



9. Internal cast of another hypostoma [1535] : c, convex view; b, cross- 

 section ; both X 2. 



In both these hypostomas the posterior margin is defective, and 

 consequently the presence or absence of spines or hooks at the 

 posterior angles cannot be determined. 



10. Anterior (?) pleura [1419] ; X 2. 



11. Posterior (?) pleura [1419] ; X 2. 



12. Posterior (?) pleura and part of axis [1817] ; X 2. 



13. Restoration of pygidium, chiefly from specimens [1819, 1819 «] which 



illustrate the size and almost all the characteristic features. One 

 transverse groove has been accidentally omitted from the axial lobe 

 in this figure. 



14. Internal cast of part of pygidium [1434], which in point of size com- 



pares with the cranidium, fig. 3: a, view from above; b, side view; 

 both x 2. 



15. Minute pygidium, with one thoracic segment [1472]; X 5. 



Conocoryphe impressa Liimarsson. (See p. 33.) 

 1G. Cranidium with test partly preserved [1384]: a, view from above; 

 b, side view ; c, view from behind ; all X 3. 



Conocoryphe bufo Hicks. (See p. 32.) 



17. Internal cast of cranidium, with left cheek buckled by unequal pres- 



sure [1388] : a, view from above; b, side view ; c, view from behind; 

 all X 2. 



Conocoryphe cequatis Liimarsson. (See p. 32.) 



18. Internal cast of cranidium [1393], with the missing parts restored in 



outline from the counterpart [1394]: a, view from above; b, side 

 view; c, view from behind ; all X 3. 



Ptyckoparia (Liostracus) ? clubia Cobbold. (See p. 39.) 



19. Internal cast of cranidium, with occipital ring damaged [1457] : 



a, view from above ; b, side view ; both X 3. 



[For the Discussion, see p. 49.] 



