28 PEOCEEDINGS OF THE NATIONAL MUSEUM vol. 76 



TELEPHUS PUSTULATUS, new species 



Plate 3, Figures 1-10 



The cranidium of this species reminds in many respects of T. latus, 

 having like it a very short spine projecting -from the middle of the 

 posterior edge of the rather narrow occipital ring and in front of 

 this a conical elevation, wide and only moderately convex fixed 

 cheeks and similarly placed pustules on the glabella, occipital ring 

 and fixed cheeks. However, T. yustvlatus differs from the Saltville 

 species in the greater convexity of the glabella and fixed cheeks, 

 more strongly developed surface pustules, and in the shape and di- 

 mensions of the glabella, this being shorter, less conical in lateral 

 outline, and more rounded in anterior outline than in T. lotus. Fur- 

 ther, the greatest width of the cranidium is proportionately greater 

 by a third mainly because of the relative shortness of the glabella. 

 Finally, all the furrows are deeper, the outline of the fixed cheek 

 is less regularly rounded, making the anterior outline of the crani- 

 dium straighter and the anterior spines turn downward more rapidly 

 than in the larger species. 



As usual the free cheek consists mainly of the great eye. This is 

 sharply separated by a deep groove from the narrow outer rim. The 

 latter widens slowly backward to attain its greatest width at the base 

 of the genal spine. The latter, contrary to expectations, does not 

 extend outwards but rises erect from the top surface of the rim and 

 in such manner that its lower part is in contact with the facetted 

 part of the eye. 



The pygidimn consists mainly of the axis, the pleural lobes being 

 narrow and comprising little else than a concave border. The axis is 

 rather broadly triangular, has three, or it may be only two, rings, 

 the first and especially the second being rather wide and flat-topped 

 and separated by deep grooves, the third much smaller and thinner 

 and close to and probably merging with the posterior rim of the 

 pygidium. Each of the rings carries a low node on its postlateral 

 angles, the second shows the broken base of an antero-median spine 

 whereas the first shows the base of a more centrally located spine 

 with three or four small tubercles on each side of it. The dorsal 

 furrows are shallow, and outside of them the convex parts of the 

 pleural lobes make very narrow low ridges that merge with the sides 

 of the second axial ring. 



Compared with European species only T. fractus Barrande ap- 

 pears on first sight much like T. pustulatiis. However, this resem- 

 blance rests mainly on the similarity in their respective glabellas, de- 

 tailed comparison showing more or less clearly recognizable differ- 

 ence in all other parts. 



