BY JOHN MITCHELL. 455 



anteriorly gently sinuate, and posteriorly shortly obliquely 

 curved. Fixed cheeks very small, palpebral lobe almost linear, 

 but convex. Free cheeks relatively fairly large, subdepressed, 

 border wide, depressed; margin very slightly thickened, furrow 

 shallow, linear; bands just within the border, and the similar 

 bands under the shallow, wide furrows beneath the eyes, bear 

 rows of granules. Genal angles apparently rounded. Eyes 

 relatively large, reniform and faceted. 



Obs. — This cephalon is clearly separated from all other known 

 Australian Phillipsise. In the shape of the glabella and possibly 

 in the possession of four glabellar furrows, relative size and 

 situation of the eyes, it bears likeness to P. eichivaldi; but it 

 differs from that species in having a nearly semicircular cephalon, 

 rounded genal angles, and in the absence of distinct cephalic 

 granulation, and of genal spines. Also, it resembles P. derhiensis 

 Martin, in the form of the glabella, small free cheeks, and char- 

 acter of its facial sutures, small palpebral lobes, rounded genal 

 angles, and widely differs in other respects. No North American 

 Phillipsi?e known to the writer, have any close relationship with 

 this one. 



Loc. and Hor. — Supposed to have been obtained near Dungog, 

 N.S.W. 



Phillipsia(?) waterhousei, sp.nov. 

 (Plate xlviii., figs.16-18: Plate Hi., fig.7). 



Complete form oval. 



Sp. Chars. — Cephalon subsemicircular, greatest length and 

 width approximately 2 mm,, and 4 mm., respectively; finely and 

 densely granulated. Glabella subcylindrical, narrow, very convex, 

 anteriorly sloping to the border rather steeply, basal glabellar fur- 

 rows small; the anterior and mesial pairs are visible on the cover, 

 basal lobes small, neck-furrows wide and deep, lateral extensions 

 similar; neck-ring strong, very convex, its lateral extensions also 

 strong; frontal limb narrow and close to the glabella. Facial 

 sutures, anteriorly, only gently diverging laterally in their course, 

 posteriorly short and oblique. Fixed cheeks small. Free cheeks 

 moderately large and strongly inflated, borders relatively wide 

 and depressed; genal angles produced into spines apparently ex- 



