OF NEW SOUTH WALES. 



^19 



portion of the facial suture extends in an undulating curve from 

 the upper interior corner of the eye to the outer anterior corner 

 of the Glabella ; the other portion from the posterior corner of 

 the eye, extends downwards to the posterior outline of the cheek. 



The Thorax contains eleven segments, the central portion or 

 axis slightly convex and raised a little above the ribs, which are flat 

 or nearly so. The segments of the axis are nearly straight, de- 

 pressed anteriorly, the depression having a convex outline pos- 

 teriorly. There is a linear groove near the anterior and posterior 

 edges of the segments ; the posterior groove of the one segment 

 covers the anterior groove of that adjoining. Each segment is 

 crossed by 10 to 12 folds ranged somewhat concentrically round 

 a point in the centre of its posterior half. Separated from the 

 lateral portions or ribs by a sinus 1 millemetre wide, sinus con- 

 cave exteriorly in the centre, convex at the edges. Outline of 

 axis convex exteriorly, width greatest in the middle. 



The ribs are flat, and straight for the greatest part of their 

 length, then curved backward, and terminate in a flat claw- 

 shaped acute angle. In the straight portion there is a linear 

 groove near the anterior to posterior edges, leaving a somewhat 

 ragged margin. This depression is continued into the curved 

 terminations. 



As in the segments of the axis, the posterior linear groove of 

 one rib covers the anterior groove of the adjoining rib. 



The curved portion is shorter and sharper in the segments 

 that are near the pygydium, and its commencement is marked on 

 each margin of the ribs by a slight punctation. 



The pygydium is nearly flat, slightly raised in the centre ; 

 semicircular for about two-thirds its length at the anterior third, 

 sides nearly straight and parallel ; anterior margins slightly pro- 

 jecting in the centre with a linear depression near the margin. 

 Axis subtriangular, composed of three segments ; component parts 

 rather obscurely marked, except at the edges. Each part de- 

 pressed anteriorly, and crossed by folds like the segments of the 

 axis of thorax. Axis separated from the ribs, fifteen in number, 

 by a sinus 1 millemetre wide. The central rib is the largest, 

 that next the line of articulation of the thorax wider at the 



