BY JOHN MITCHKLL. 447 



twelve pleural segments, and less disparity between length and 

 width of the pygidium. 



The pygidium {loc. cit., PI. xxii., fig. 15) placed by Mr Ether- 

 idge in the genus Grijfithides, bears a resemblance to the present 

 species in the character of its border and granulation, and in 

 having the same number of pleural segments; but its axis has 

 less rings, and ends in a sharp point. 



Lastly, referring to De Koninck's P. {Grijjithides) seinhiifera 

 {noil Phillips sp.)* from Colo Colo. The dimensions, number of 

 rings in the axis of the pygidium, character of the granulation 

 generally on the pygidium and thorax agree closely with similar 

 features of F. collinsi: but the two forms widely differ in the 

 outlines of their glabellse and pygidia, if De Koninck's figures 

 are to be relied upon, which is doubtful, as they do not agree 

 with the text. In the former, the glabella is represented as 

 being conical in outline; and, in the latter, it is said to have an 

 anterior width slightly less than that of its base. Whatever 

 Phillipsia [Grijfithides) seminifera De Koninck, may have been, 

 it is practically certain it was not Grijjithides seminiferus 

 Phillips; but it may have been identical with the present species. 



Named after Mr. Collins, C.C.M., Lecturer in Coalmining and 

 Mine Surveying at the Newcastle Technical College. 



Loc. and H or. — Glen AVilliam Road, one mile from Clarence- 

 town, Parish Parr, County Durham. Lower(?) Carboniferous. 



Philijpsia coulteri, sp.nov. 

 (Plate xlvi., figs 6-10;. 



Sjo. Chars. — Complete form subelliptic. 



Cej^halon sub-semielliptic, fairly inflated, finely granulated : 

 glabella subrectangular, rounded in front, lateral furrows and 

 lobes not visible, owing to the loss of the part bearing them, and 

 the exposure of the hypostome; neck-furrow shallow, its lateral 

 extensions across the cheek.s shallow and wide; neck-ring narrow; 

 axial furrows faint. Fixed cheeks small. Free cheeks relatively 

 large, strongly inflated, steep between the eye and border-furrow, 

 which is wide and shallow, outer edge of border only moderately 



* Pal. Foss. Nouv. Galles du Sud, 1877, p.'267, PI. xxix., figs. 9, 9m. 



