430 TKILOBITES FKOM BOLIVIA. [-^Ug. I906, 



EXPLANATION OF PLATE XL. 



[The specimens have been placed by Dr. J. W. Evans in the British Museum 

 (Natural Histoi-y) at South Kensington.] 



Fig. 1. Peltura sp. Natural size. 



2. Symphysurus Apolonista, sp. nov., head. X 5. 



3. Symphysurus Apoionista, sp. nov.. tail. X 5. 



4. Trirmcleus boliviensis, sp. nov., head. X 5. 



5. Trinucleus boliviensts, sp. nov., side view of head. X 5. 



6. Ogygia sp., fragment of toil. Natural size. 



7. Ogygia sp., hypostome. x 2. 



8. Phacops cf. arbuteus, Lake, portion of head. Natural size. 



9. Dalmanites Paituna, Hartt & Bathbun (?), head. Natural size. 



10. Dalmanites Paituna, Hartt & Bathbun (?), reflexed frontal border of 



head, seen from below. Natural size. 



11. Dalmanites Maecurua, J. M. Clarke (?). Natural size. 



[For the Discussion, see p. 432.] 



