304 F. R. Cowper Reed— 



forwards at first with a slight convergence, but then rather suddenly- 

 bending inwards to traverse the pre-glabellar region and unite in a 

 short median point, thus conjointly forming a distinct transverse 

 suture, which defines the prora posteriorly. Epistomal ( = rostral) 

 sutures arising from the points at which the facial sutures bend 

 inwards, and forming a pair of short subparallel sutures bounding 

 the prora laterally, and cutting the anterior margin of the head- 

 shield at right angles. Epistomal (= rostral) plate situated on 

 lower surface of head-shield, subtriangular in shape, bearing a stout 

 median apiculus, and bounded by the inferior continuation of the 

 epistomal sutures, which cut it off from the flattened triangular 

 lateral portions of the doublure. Cheeks with general surface 

 convex and elevated. Free cheeks, with inner portion swollen and 

 rising to maximum height at eyes, having large rounded boss or 

 tubercle situated towards margin slightly in front of eyes ; 

 margin simple, without definite border. Eyes small, situated rather 

 close to the glabella on elevated portion of cheeks at level of second 

 lateral glabellar tubercles. Thorax of 13 segments, strongly convex. 

 Axis broad, gently convex, faintly marked off from pleural portions. 

 Axial rings bearing two pairs of tubercles, of which the outer ones 

 are the larger. Pleurae arched down on each side, gently flattened, 

 particularly towards extremities, which are obtusely rounded and 

 slightly curved forwards. Twelfth pleura bearing large rounded 

 boss at half its length, but absent from eleventh and thirteenth 

 pleurae. [Anterior thoracic segments not sufficiently preserved 

 for determination of characters.] Pygidium elongated, semi- 

 elliptical in shape, with simple lateral margins, but furnished 

 posteriorly with a short bifurcated spinose process. Axis long, 

 conical, convex, slowly tapering, composed of eleven complete 

 rings, with traces of one or two more very faintly indicated rings 

 followed by a short non-annulated terminal portion with a blunt 

 tip nearly touching base of posterior forked process. Axial rings 

 well defined, some bearing tubercles, i.e. four tubercles on the first 

 ring like those on the last axial ring of the thorax, two faint ones on 

 the second ring, and two distinct ones on the third and fourth rings, 

 apparently corresponding with the outer ones of the first ring; 

 the fifth ring has two smaller ones, apparently corresponding with 

 the inner pair ; the sixth ring has none ; the seventh ring has the 

 two outer ones ; the eighth to tenth rings have only faint traces 

 of one outer pair ; the eleventh has one more distinct pair. Axial 

 furrows strong, distinct. Lateral lobes arched gently down on each 

 side, with smooth undefined narrow border. Seven or eight distinct 

 flattened pleurae on each side, nearly straight, but with the ends 

 slightly curved, not reaching margin, and with traces of a large low 

 boss or tubercle on first pleurae at about two-thirds its length 

 and of a more distinct one on the fourth pleura at about half its 

 length. Posterior end of pygidium furnished with a pair of closely 

 placed, slightly diverging curved spines arising from a common 



