137 BULI.KTIN I,^ 



Explanation of Plate i6 



Page. 

 Fig. 1,3. Harrisia par-abola , 11. s. Frontal and lateral 



view of the cephaloii of the same specimen 15, 127 

 2. Dorsal view of another specimen. 

 5, 6. Bathym'us ellipticus, n. s. Dorsal and 



lateral views of the same specimen 17,129 



9. Bathyurtisf Dorsal view of the glabella 17,129 



4. Asaphus convexus (.^) n. s. Dorsal view of a 



well-preserved pygidium 16, 128 



7. Asaphus canalis i^f). Ventral view of a free 



cheek 16, 128 



8. Dorsal view of a pygidium of another in- 



dividual. 

 ID, XI. Ribeiria (.^) nuculitiforniis , n. s. Lateral 



views of the shell 21, 133 



12. Posterior view of a cast. 



13, 14. Lateral views of casts. 



15. Ribeiria niiculitiformis var. cquilatcra (;^). 



Lateral view 21, 134 



16, 17, 18. Crinoid plates. Showing the surface 



markings of the plates. 1 9, 131 



