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[SenatS 



our possession, and cannot vary much from the truth. There are three pairs of 

 glabellar furrows anterior to the occipital furrow. In the area between the extremi- 

 ties of the glabella lobes and the eyes, there are on each side, in the species figured, 

 two low oblong tubercles; but I cannot be sure that the.se are of generic impor- 

 tance, and it might be supposed possible that this appearance is due to the crushing 

 of a prominent part of the crust, were it not that the feature is symmetrical and 

 correspondent on the two sides. 



The facial suture can be traced a little forward of the eye, but its direction on 

 the anterior margin has not been ascertained : on the posterior margin, its direction 

 is shown as accurately as rt can be from crushed and distorted specimens. The 

 body, or thorax and pygidium, is drawn essentially from a single individual. The 

 line just within the free extremities of the pleura is shown in this and other speci- 

 mens, and indicates the limits of the crust on the lower side. The caudal shield 

 shows no more than the axis which is prolonged into a slender pointed spine, 

 strengthened by a sharp elevated ridge beginning near the anterior margin, and 

 extending to the extremity. 



The entire absence, so far as can be seen, of lateral lobes of the pygidium, is a 

 marked feature; and this especially is in strong distinction with Olenus. 



Babrandia thoufsoki. 



