418 G. L. COLLIE — ORDOVICIAX SECTION XEAK BELLEFONTE 



The Lorraine shales occupy the upper 350 feet of the shale series. In 

 the Lorraine there are a number of fossiliferous beds which contain 

 fossils similar to those of like age in New York. 



Description of New Species 



bronqniartia trentonensis {simpson)* 



Plate 59, figure 1, thorax and pygidium ; figure 2, cranium 



The author of the above species figured but did not describe a trilobite 

 which he found in Huntingdon count}^, Pennsylvania, under the name 

 stated above. It is now necessary to restrict Simpson's species, though 

 his specific name should be retained. 



Salter has used the sub-generic term Brongniartia for Ordovician types 

 related to Homalonotus, and his usage is adopted here, and the name 

 Brongniartia trentonensis applied to this particular trilobite. The writer 

 has figured the species anew, and the following is a description of it : 



Entire animal 8 centimeters long ; somewhat elongate and narrowing 

 behind ; distinctly trilobed, test punctate. 



Cranidium, irregularly trapezoid in form ; anterior margin gentl}^ con- 

 vex, anterior border broad, concave ; posterior border nearly straight, 

 with distinct occipital groove. 



Glabella, defined somewhat imperfectly by dorsal furrows, subquad- 

 rate, smooth, convex ; the median area strongly convex. Free cheeks 

 not observed. 



Thorax, with 11 (?) segments, axis one-third the whole width. 



Pygidium, eight pleural annulations, triangulur, length two-thirds 

 the greatest width ; posterior rounded with narrow fiat margin ; axis 

 convex, well defined by dorsal furrows, tapering rapidly, rounded at the 

 posterior end, which terminates just within the margin ; 11 annulations. 



Localit}^ and formation, Bellefonte, Pennsylvania, in the lower por- 

 tion of the Trenton group. Collected by G. L. Collie. 



ENCRINURUS TUBERCULOSIS SP. NOV. 



Plate 59, figure 3, pygidium x 2 diameters 



Pygidium, sub-pentagonal in outline, elongated, conical and convex 

 axis; 25 annulations, normally three tubercles on each, but not well 

 defined toward the posterior. Side lobes with eight moderate!}^ broad, 

 slightly convex ribs, the last pair commencing at the eighteenth axial 

 annulation and extending backward nearly parallel with the axis ; the 

 succeeding three pairs are about parallel with the posterior pair, the 



* Homalonotus trentonensis Simpson, Proc. Am. Phil. Soc, vol. 16 (new series), 1890, p. 460, 

 figure 31. 



