48 CARBONIFEROUS TRILOBITES. 



want of ccphalothoracic furrows, &c. Having now examined numerous specimens 

 of the Australian species, there can be no longer any doubt of the distinctness of 

 the group from PMlUpsia from the characters of the cephalothorax, and the 

 pygidium is still more distinct. From those materials I have therefore drawn up 

 the above characters, which it is believed will distinguish them easily from the 

 other generic types. From the general similarity in the structure of the pygidium, 

 I am inclined to refer the fossil which I have named PMlUpsia (?) discors (' Synopsis 

 of the Carb. Limestone Foss. of Ireland,' pi. 4, fig. 7, p. 161) to the same genus. 

 This is also a very small Trilobite, the length of the pygidium being only three 

 lines ; and although referring it provisionally to PJdllipsia, I suggested in the 

 above work that it should, when better known, form the type of a distinct genus, 

 which, however, it was not possible to frame until now." 



23. Brachymetopus ouralicus, Vg Vern, sp. 1845. PI. VIII, figs. 1 — 8. 



Phillipsia Jonesii, Be Koninck. Anim. Foss., p. 600, t. 53, fig. G, 1844 (non 



Portlock). 

 oubalica, Be Verneuil. Geol. Russ., vol. ii, p. 378, tab. 27, figs. 16 a, b, 

 1845. 

 Beachymetopus otjbalicus, Morris. Cat. Brit. Foss., p. 101, 1854. 



— J. W. Salter Sf H. Woodw. Cat. and Chart Foss. 



Crust., p. 16, fig. 118, 1865. 

 — — ? V. von Mbller. Bull. Soc. Nat. Moscou, pp. 24—27, 



and pp. 67, 68, pi. ii, figs. 32—35, 

 1867. 

 H. Woodw. Cat. Brit. Foss. Crust., p. 28, 1877. 



— H. Woodw. Geol. Mag., Decade ii, vol. x, p. 534, 



pi. xiii, fig. 1, 1883. 



Head-shield nearly twice as broad as it is long, slightly pointed in front ; 

 glabella small, tumid ; very obtusely conical, only half the length of the head- 

 shield, and one third its breadth, no short lateral furrows visible, only the two 

 small basal lobes which truncate the posterior angles of the glabella ; axal-furrow 

 enclosing the glabella antero-laterally ; neck-lobe narrow, rounded distinctly, 

 separated by the neck-furrow from the glabella ; eyes small, placed close to the 

 glabella, prominent, reniform, surface smooth ; no facial suture visible ; free-cheeks 

 convex confluent around the glabella, with a broad, flattened, slightly concave 

 margin, the rim of which is slightly raised; posterior margin of free-cheeks 

 separated by a furrow, continuous with the neck-furrow ; tho posterior angles of 



