14 PEOCEEDINGS OF THE NATIONAL MUSEUM vol. 76 



Angelin's figure and brief description of the cranidium of this 

 species shows and mentions — probably in error — three closely ap- 

 proximated anterior spines. In other respects the figure agrees well 

 enough with the figures of two other cranidia given by Hadding to 

 warrant the belief that the latter are conspecific with Angelin's type 

 of the species. Still it should be pointed out that the figures of the 

 two cranidia used by Hadding show certain differences that are not all 

 readily accounted for as due to distortion in the compression of the 

 shale matrix. The relative shortness and the greater anterior width 

 and bluntness of the glabella in Figure 19 as compared with Figure 



18 is readily explained on that ground, as is also the difference in 

 the relative sharpness of the antero-lateral angles. But I do not see 

 why the anterior spines should be so much farther apart in Figure 



19 than in Figure 18 if the same structures are shown in both. In fact 

 I strongly incline to the belief that it is the inner pair that is shown 

 in Figure 18 and only the outer pair in Figure 19. 



Assuming that Hadding's Figure 18 represents something near the 

 normal outline of the species it suggests T . spiniferus perhaps more 

 than any of the other American species. In both the occipital spine 

 is long and the surface tuberculated. However, the tubercles are 

 smaller and more numerous in the Swedish species, and the figures 

 give no indication of their longitudinal arrangement on the middle 

 of the glabella nor of those on the fixed cheeks that are so strikingly 

 indicated on the head of the American species. Besides, the free 

 cheeks are narrower behind and wider in the middle in the latter and 

 their outlines more rounded than in T. wegelini. 



Occurrence. — Trinucleus shale, at localities in Dalarne, Sweden. 



TELEPHUS MOBERGI Hadding 



Plate 2, Figures 1-9 



TelepJms mohcrgi Hadding, 1913, Sljiktet Telephus Barr., Medd. Lunds 

 Geolog. Faltklubb, No. IS, p. 37, pi. 2, figs. 12^17. 



This doubtless is a good species and clearly distinguishable from 

 previously described European species. It is also of unusual interest 

 to me because its kinship to two or three of our American species is 

 more obviously indicated than in any of the other instances. In one 

 case, indeed, I am not sure that T. troedssoni Kaymond, to which I 

 am referring also some distorted American specimens from Alabama, 

 can be distinguished satisfactorily from this Swedish species. The 

 second American ally, of which many excellently preserved cranidia 

 have been found and which seemed at first referable to T. tnobergi^ 

 has proved on detailed comparison to differ too much in various 

 respects from Hadding's illustrations of his species to permit using 

 the same name for both. These differences are pointed out in re- 



