Batmond. — New and Old SUurian Trilobites. 



PLATE 4. 



1. Cheirurus dilitatus Raymond. The holotype. From the Waldron shale, 



Waldron, Indiana. Natural size. M. C. Z. 628. 



2. Cheirurus patens Raymond. The holotype. From the Niagaran at 



Cicero, Ilhnois. Natural size. M. C. Z. 629. 



3. Cheirurus dilatatus Raymond. A pygidium from the Waldron shale. 



X 2. M. C. Z. 1273. 



4. Cheirurus niagarensis Hall. Cephalon and part of thorax from Wauwa- 



tosa, Wise. Natural size. M. C. Z. 627. 



5. The same species. A pygidium from the Rochester shale at Rochester, 



N. Y. X 3.4. M. C. Z. 624. 



6. The same species. An hypostoma from Wauwatosa, Wise. Natural 



size. M. C. Z. 1278. 



7. Cheirurus welleri Raymond. A cotype. Wauwatosa, Wise. Natural 



size. M. C. Z. 14. 



8. The same species. The other cotype. The same specimen is shown in 



Plate 3, fig. 6. Wauwatosa, Wise. X f. M. C. Z. 630. 



9. Cheirurus niagarensis Hall. A pygidium from Wauwatosa, Wise. X 2. 



M. C. Z. 1277. 

 10. Cheirurus welleri Raymond. An hypostoma. Wauwatosa, Wise. The 

 specimen is attached to a glabella. X 1.45. M. C. Z. 1269. 



