BY JOHN MITCHELL. 449 



The species has been named after Mr, E. Coulter, of Katoomba, 

 an enthusiastic student of geology, who discovered and presented 

 the specimen to the author. 



Loc. and /To?*. — Stroud-Dungog Road, near Dungog, Parish 

 Howick, County Durham. Lower Carboniferous. 



Phillipsia brkvickps, sp.nov. 

 (Plate xlvi., figs.ll, 12; and Plate li., fig.2). 



S]). CAars. — Complete form unknown. 



Cephalon apparently subsemicireular, finely granulated. Gla- 

 bella straight-sided, rounded in front, very gently convex, 

 highest just in front of the neck-furrow, smooth, though a lens 

 shows evidence of microscopic granulation, two pairs of lateral 

 furrows visible, basal and mesial. 'J'he former very shallow and 

 circumscribing the basal lobes, which are large and pyriform; 

 the other narrow; neck-furrow narrow and shallow; neck-ring 

 relatively wide, decidedly arched back ward ly and lobed at its 

 l)ases; frontal limb narrow and gently recurved. Fixed cheeks 

 very small, eye-lobes small, and abutting the axial furrows. 

 Facial sutures anteriorly rather straight and close to the axial 

 furrows; eyes of moderate size only, judging by the size of the 

 palebral lobes. 



Thorax unknown. 



Pygidium sub-semielliptical, moderately convex, very fineh' 

 granulated; width 10 mm., and length 7 mm. respectively. Axis 

 prominent, consisting of thirteen rings, and a very narrow end- 

 piece, spread equal to that of each side-lobe, contracting very 

 gradually posteriorly, and terminating short of the border, 

 rounded and bluntly, with half its anterior width; some of the 

 rings bear very fine tubercles, barely distinguishable without 

 the aid of a lens; side-lobes moderately convex, with ten, or 

 doubtfully eleven, pairs of segments, of which the medial furrows 

 are distinct, and, in the case of the four anterior pairs, at least 

 reach the edge and interrupt the narrow border; a few of the 

 posterior segments bear very small tubercles at their junction 

 with the border, and three similar tubercles occur behind the 

 axis, on the axis itself centrally the posterior ridges also bear 

 fine tubercles. 



