F. R. Cou'per Reed — A New N. American Trilohite. 359 



Affnostus interstrictus (White). 

 Oryctocephalus Reynoldsi, n.sp. 

 Aciotreta gemma (Billings). 

 Ktitorgiim pannula (White). 

 L'mgulella eUa (Hall & Whitfield) ? 

 Scenella cf . raricms (Walcott) . 

 Hyolithes, sp. 



All the above trilobites have been recorded previously with the 

 exception of Olenoides cf. quadriceps and Oryctocephalus Beynoldsi, 

 n.sp., the latter of which I have much pleasure in naming in honour 

 of its discoverer. The specimen is of peculiar interest as it consists 

 of a complete individual in perfect preservation, whereas our previous 

 knowledge of the genus has been restricted to the disconnected head- 

 shields and pygidia of Orycto. primus described by Walcott. 



fiestored outline of Onjctocephahts Reynoldsi, sp. nov. Middle Cambrian : Mount 

 Stephen, Field, British Columbia. Magnified about four times natural size. 



Oryctocephalus Eeynoldsi, n.sp. 



Head-shield transversely semicircular, broad, short, more than 

 twice as broad as long. Glabella elongate, cylindrical, sides parallel ' ; 

 reaches margin ; front rounded ; surface marked by four pairs of 

 transverse furrows. The three anterior pairs of transverse furrows 

 are equidistant, and terminate in small deep pits within the margin 

 of the glabella ; each furrow is shallow and arches slightly back- 

 wards in the centre. A shallow groove parallel to the axal furrow 

 connects the pits on each side longitudinally. The fourth transverse 

 furrow crosses the base of the glabella at a distance from the third 

 furrow rather greater than the latter from the second or the second 



1 Owing to slight crushing the glabella in our specimen appears to be slightly 

 ■wider in front than at the base. 



