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ON TWO NEW TRILOBITES FROM BOWNING. 



By John Mitchell, late Principal, Technical College, 



Newcastle, N.S.W. 



(Plates xv.-xvi.) 



Dalmanites (Hausmannia) loomesi, n.sp. 

 (PI. xv., figs. 1, 2; PI. xvi., figs. 3, 4, 5). 



Hausmannia meridianus, Eth. and Mitchell (in part), Proc. 

 Linn. Soc. N. 8. Wales, 1895, pp.504- 509. 



Complete form oval. 



Cephalan subsemicircular, smooth, moderately convex, greatest 

 length, 25mm., width, 58 mm. between the genal angles. 



(ilabeUa subpyriform, very gently tumid, depressed; anterior 

 glabellar furrows wide, shallow, oblique and do not meet medially; 

 second pair slit-like, do not communicate with the axial grooves, 

 nor are they continuous transversely; third pair similar to second 

 pair, but nearly reach the axial furrows; front glabellar lobe sub- 

 ellipsoidal, anterior pair subtriangular, second and third pairs 

 more or less rectangular, the latter pair being rounded at the 

 posterolateral angles by the neck furrow; neck furrow deep and 

 narrow towards the axial grooves, but faint medially, and has an 

 anterior direction centrally and basally; its lateral extensions are 

 wide and fairly deep, especially along their anterior boundary, 

 thus giving to the portions of the fixed cheeks abutting them pro- 

 minent faces; neck ring moderately arched, its lateral extensions 

 narrow and prominent. Axial grooves wide and shallow. Fixed 

 cheeks large, the portions between the posterior branches of the 

 facial sutures and posterior furrows delicately wrinkled ; genal lobe 

 large, mildly convex, subpyriform, and separated from the pal- 

 pebral lobes by a shallow furrow; genal angles bear spines reach- 

 ing to the sixth and seventh thoracic somite. Free cheeks small, 

 continuous, depressed, lateral furrows narrow and deep, borders 



