BY JOHN MITCHELL. 471 



Brachymelopus dniififani. Middle or Lower Carboniferous pro- 

 bably. 



Phillipsia morganensis, sp. nov. 

 (PI. xlix., figs.ll, 12; PI. li., 6g.l). 



.S';;. CAa/-6\ — 6V/?/irt/o?i sub-semicircular, very finely granulated, 

 greatest length and width 8 mm., and 16 mm., respectively. 

 Glabella subconical or sub-bellshaped, mildly convex, finely and 

 densely granulated, longer than wide ; three pairs of lateral 

 furrows distinctly shown, basal pair very deep and wide, anterior 

 and mesial pairs short and only gently curved posteriorly: 

 anterior and mesial lobes of moderate size, basal pair fairly 

 large, with small complementary lobes present; neck-furrow deep 

 and wide, the extensions laterally also fairly deep and wide; 

 neck-ring strong, moderately convex, strongly curving anteriorly 

 at its bases; facial sutures anteriorly very straight, posteriorly 

 short and oblique, frontal limb narrow and close to the glabellar 

 front; fixed cheeks very small, with small eye-lobes. Free cheeks 

 rather large, only moderately tumid, finely granulated, both 

 borders and lateral furrows large, the former being moderately 

 thickened, finely granulated on the upper and striated on the 

 undersurface, the latter being shallow, ocular furrow wide and 

 shallow. Eyes of moderate size, finely faceted, vertically narrow, 

 and decidedly higher behind than in front. Genal angles obtuse. 

 Hypostome shield- like, narrow, not alate, posteriorly glossiform 

 and corrugated, no striae visible, widest at two- thirds of its length 

 from the front edge. 



Thorax not known in a complete state, but one, on which a 

 pygidium and a free cheek rest, shows the following features — 

 moderately convex, finely granulated. Axis moderately convex, 

 diminishing in width and height gradually posteriorly, wider 

 than one side-lobe, rings strong, valleys narrow and having an 

 anterior inclination, bases non-tuberculate, axial furrows linear. 

 Side-lobes not well shown, but the segmental ridges and furrows 

 were strong and deep respectively. 



Pygidium widely triangular, mildly convex and granular, 

 length 7 mm., and greatest width 12 mm. Axis mildly and 

 evenly convex, anterior width equal to that of one side-lobe, 



