Plate 5 



I'age 

 Figs. 1-9. Telephus bipunctatus, new species 31 



1-3. Dorsal, lateral, and anterior views of a nearly perfect 

 cranidium, X 4. U.S.N. M. No. 80543a. 



4-6. Dorsal views of three other cranidia, X 4, selected to 

 show extremes of observed variations in shapes of parts and 

 in surface sculpture. U.S.N.M. No. 805436. 



7, 8. Dorsal and posterior views of a pygidium, X 4. Only 

 the broken bases of the double-headed spines on the axial 

 rings are retained when the specimens are uncovered in 

 breaking the limestone matrix. U.S.N.M. No. 80543c. 



9. The most complete of the free cheeks, X 4. U.S.N.M. 

 No. 80543d. 



Whitesburg limestone, Lexington, Va. All these specimens 

 may be ranked as cotypes of the species. 

 10-15. Telephus impunctatus , new species 33^ 



10-13. Dorsal views of four cranidia, X 3, that may be re- 

 garded as cotypes of the species. U.S.N.M. No. 80544. 

 The specimen of Figure 12 has been slightly distorted by 

 obliquely transverse pressure. 



14. Side view of Figure 13. 



15. Pygidium associated with these cranidia, X 4. It is 

 wider and the axis less convex than in T. bipunctatus which 

 occurs in the same bed and place. U.S.N.M. No. 80545. 



Whitesburg limestone, near Albany, Tenn. 

 16. Telephus buttsi, new species 40 



One of three very small cranidia, X 8. All of these have been 

 similarly shortened by compression. Their general aspect 

 suggests T. bipunctatus and T. troedssoni, but the occipital 

 spine is too long, slender, and round for either of those spe- 

 cies. They remind also of T. mobergi, but the occipital 

 spine is too long and the fixed cheeks too wide to warrant 

 their reference to that species. U.S.N.M. No. 80546. 



Yellow, leached shale, at base of the Athens shale, near Long- 

 view, Ala. 

 17-21. Telephus troedssoni Raymond 40' 



17. Dorsal view of a clay impression taken from the holotype 

 of this species, X 3. The latter is a natural mold of the ex- 

 terior of an imperfect cranidium, somewhat distorted by 

 compression in slightly oblique direction. Original in Mus. 

 Comp. Zool., Cambridge, Mass. 



Near base of Athens shale, near Athens, Tenn. 



18. An imperfect and distorted cast of the interior of a crani- 

 dium supposed to belong to this species. The middle part 

 of the anterior border is well preserved and clearly shows 

 the distinctness of the median anterior pair of spines and 

 the shorter spines to which the ends of the free cheeks are 

 joined. U.S.N.M. No. 80547. 



19. An associated cast of the interior of a free cheek with 

 compound eye, X 8. U.S.N.M. No. 80547a. 



94 



