662 SILURIAN TRILOBITES OF NEW SOUTH WALES, V., 



Encrinurus BOWNiNCiENSis, Foerste (emend.). 

 (Pl.liv., figs.6, 7, 8, 9, 10, 12, 14; Pl.lv., figs.S, 6,12; Pl.lvi., fig.S.) 



E. BrowniyKji (in error) Foerste, Bull. Sci. Lab. Denison Univ., 

 iii., Pt.2, 1888, p.l22, PL xiii., fig.7. 



Sp. Chars. — Cephalon subsemicircular, length half its width, 

 highly tuberculate; glabella very tumid, strongly pyriform, very 

 contracted posteriorly, front portion semiglobular; tubercles large 

 and strawberiy-like, with a fairly constant and symmetrical 

 arrangement, thus — protruding into the axial furrows are the 

 generic five pairs (the anterior and posterior pairs of which are 

 not conspicuous), on the contracted glabella neck are two or 

 three pairs (small), and in advance of these latter is the general 

 cluster which usually assume a more or less circular arrangement 

 around a central one; these are nearly all large and bear fine 

 granules; axial furrows impinged upon by the marginal glabella 

 tubercles, neck-furrow indistinct but its lateral extension across 

 the fixed cheek narrow and deep, neck-ring strongly arched, its 

 lateral extension narrow and prominent. Fixed cheeks inflated, 

 tuberculate, axial border margined by fine tubercles interspacing 

 with those on the sides, the others of variable size and arrange- 

 ment, but longitudinally rows of three occupy the median lines 

 of the cheek, and a posterior transverse line overhangs the lateral 

 extensions of the neck-furrow; genal angles rounded and bear- 

 ing a few small tubercles. Free cheeks relatively large, the 

 smaller portions which clasp the front of the glabella subrect- 

 angular and densely covered with large, low tubercles; the larger 

 lateral portions widely triangular but densely covered with low 

 irregularly sized tubercles, borders on the posterior larger portions 

 relatively large and tumid, furrows distinct, axial grooves in 

 crossing the boi'ders of the free cheeks bifurcate, one branching- 

 backward joining the free cheek furrow and the other proceeding- 

 inward and forward, passing out just before the middle line of 

 the glabella is reached. Eyes prominent, pedunculate, highly 

 convex, circular in cross-section, surrounded by distinct sulci, 

 which are made increasingly pronounced by rows of bQrdering 

 tubercles. Facial sutures openly Y-shaped. 



