Plate 6 



Page 

 Figs. 1-7. Telephus mysticensis, new species and variety 22 



1. Holotype cranidium, X 3. Very similar in general aspect 

 to the cranidium of T. americanus but lacks the small surface 

 pustules and the glabella has shallow curved longitudinal 

 depressions that are not present in the types of that species. 

 U.S.N.M. No. 80526. 



2. Free cheek with posterior side above, X 4. Paratype 

 U.S.N.M. No. 80527a. Possibly the cheek of the var. 

 simulator 



3. 4. Probably anterior and dorsal views of another slightly 

 different free cheek, X 4. Paratype U.S.N.M. No. 805276. 

 The collections contain four or five of each of these two 

 kinds of cheeks, but to which of the two kinds of cranidia 

 either belongs is, of course, uncertain. The lower side of 

 figure 4 probably is anterior. The periphery of the eye here 

 overhangs the narrow rim. 



5 An associated hypostoma, X 4. Paratype U.S.N.M. No. 

 80527c. 



6. One of the two associated pygidia, X 4. Paratype U.S.N.M. 

 No. 80527d. 



7. Cranidium, X 4. Differs in shape and contour of the 

 glabella from the holotype and in size and shape of the fixed 

 cheeks. Probably a distinct species that is provisionally 

 separated as var. simulator, new variety. This name is 

 chosen because it greatly resembles the southern T. prat- 

 tensis (see pi. 3). Holotype, U.S.N.M. No. 80528. Boulders 

 of Chazyan limestone, near Mystic, Quebec. 



8-9. Telephus bilunatus, new species 39 



8. Dorsal view of the holotype cranidium, X 4. U.S.N.M. 

 No. 80529. The most characteristic feature of the species 

 is the pair of deep lunate glabellar impressions. Whites- 

 burg limestone, near Albany, Tenn. 



9. A cranidium, somewhat larger than the holotype and dis- 

 torted by lateral compression of the soft shale matrix, X 4. 

 U.S.N.M. No. 80530. From a bed of yellow shale near 

 Longview, Ala., probably of Whitesburg age but provi- 

 sionally referred to the base of the Athens shale. 



10-19. Telephus tellicoensis, new species 35 



10-12. Three views of a free cheek of a Telephus and probably 



of this species, X 4. U.S.N.M. No. 80531. 

 13-15. Dorsal views of three cranidia, X 3. Cotypes, U.S.N.M. 



No. 80532. Anterior and side views of Figure 14 given 



in pi. 7, figs. 10, 11. 

 16-18. Three pygidia, X 4, the last showing the shape of the 



posterior marginal spine. Cotypes, U.S.N.M. No. 80533. 

 19. Side view of specimen shown in Figure 14, for comparison 



with T. hircinus (see pi. 7, fig. 2). Basal 10 feet of Tel- 

 . lico formation, 1.5 miles southeast of Knoxville, Tenn. 



20,21. Telephus transversus, new species 37 



Dorsal and anterior views of the holotype cranidium, X 3. 



Distinguished from T. tellicoensis by its greater width and 



broad hollows in lateral slopes of glabella. U.S.N.M. No. 



80534. Associated with preceding. 

 96 



