PALEONTOLOGY OF NEW YORK. 

 BRON TEIDJE. 



B U N T E U S , Goldfuss. 1843. 

 Bronteus Tullius, n. sp. 



l'l.Aii: \in a, figs, a 16. 



Cephalon and Thorax unknown. 



Pyqidium flabellate, comparatively small; outline semi-ovate, anterior margin 

 rounded and incurved toward the axis. Length to width as 2 to 3. 

 Surface depressed, gently elevated and convex about the axis, becoming 

 concave toward the margin and slightly reflexed at the edge. 



Axis short, about one-fourth the length of the shield; width about twice 

 the length. Outline broadly trigonal. Articulating ring prominent, but not 

 well preserved in the type specimen. No annulations visible. 



Pleura very broad and bearing fifteen broadly flattened and simple annula- 

 tions. Of these the widest lies in the axial line with seven on either side. 

 These annulations are nearly straight, radiating evenly from the margins of 

 the axis and separated by narrow, sharply impressed sulci. Both the annula- 

 tions ami sulci become obsolete before reaching the border, the posterior 

 ono not extruding so far as the anterior. The border is ornamented with a 

 single row of minute spinules, numbering about twenty-five along the termi- 

 nal margin of each annulation : these measure scarcely 1 mm. in length and 

 are inclined slightly upward. Doublure very broad, extending fully halfway 

 across the \>\ iridium. 



Test extremely thin; the portions retained are strongly and regularly 

 pustulose, the pustules on the ribs apparently extending to the margin. The 

 doublure is marked by distant, sub-parallel, anastomosing, lamellose lines. 



The type specimen has a length of 15 mm. and a width of 21 mm. 



Another specimen of limestone from a, different locality bears the epis- 

 tomal doublure of some trilobite. This fragment is broadly convex and 

 prominent over the central area and constricted toward the sides, and is quite 

 unlike the frontal doublure ,,f any associated species of crustacean, but has 



