PAPERS READ. 



ON A TRILOBITE FROM REEFTON, NEW ZEALAND, 

 NEW TO AUSTRALASIA. 



By Professor F. W. Hutton, F.G.S. 



I have obtained from Mr. R. Helms of Greymoutb, a very fine 

 Trilobite belonging to the genus Homalonotus, which was found 

 near Reefton, and, as it appears to be new to New Zealand, I give 

 a description of it. The specimen is rolled up, and the anterior 

 portion of the cephalic shield, as well as the posterior end of the 

 pygidium are absent. It is filled with brown chert which cannot 

 be scratched with a knife, but the exoskeleton is black. 



The body is elongate, tubercled, broadest at the base of the 

 cephalic-shield thence gradually tapering backwards to a point. 

 The greatest breadth is 3-25 inches, and the total length was 

 probably about eight inches or rather more. 



Cephalic- Shield. — The apex is gone, the posterior angles are 



broken and the surface of the glabellum and fixed cheeks is much 



rubbed, so that the description of this part is necessarily deficient. 



The shield itself is broadly triangular, the ratio of length to breadth 



being about 2 : 3. The glabellum is distinctly lobed, but the 



surface is entirely rubbed away. The cheeks are inflated and 



bend suddenly down outside the eyes, the exterior margins are 



also incurved ; the surface is covered with scattered granules 



which are placed more closely together on the fi-ee cheeks and are 



esi^ecially close and coarse on the incurved exterior margins. The 



eyes are situated on lai-ge rounded swellings of the cheeks, but 

 17 



