of the Rocks associated with the Coal of Australia. 231 



Brachymetopus Strzeleckii (M'Coy). PI. XII. fig. 1. 



Sp. Char. Glabella widest at the base, with one very minute 

 obscurely marked cephalothoracic furrow at the base on each 

 side ; all the segments of the pygidium with an irregularly 

 tuberculated ridge along the middle ; lateral segments forming 

 large tubercles where they join the thickened limb, opposite 

 each of which is a short slender spine projecting from the 

 margin. 



The greater size of the glabella and its being widest at the 

 base will distinguish the head from that of the P. Maccoyi 

 (Portk.), and the granulation extending entirely across the seg- 

 ments and the spinose margin will distinguish the pygidium 

 from that of the P. discors (M'Coy). 

 Width one and a half line. 

 Common in the shale of Dunvegan, N. S. Wales. 



Phillipsia. 



A species closely resembling the P. gemmulifera (Phil, sp.), 

 but not distinctly preserved, occurs in the shale of Dunvegan, 

 N. S. Wales. 



MOLLUSCA. 



(Brachiopoda.) 



Atrypa cymbaformis (Mor.). 

 Very common in the sandstone of Muree, N. S. Wales, and in 

 the impure limestone of Black Head, N. S. Wales. 



Atrypa biundata (M'Coy). PL XIII. figs. 9 & 9 a. 



Sp. Char. Longitudinally ovate, gibbose, smooth ; front narrow ; 

 margin raised in two rounded waves, from which two obsolete 

 rounded ridges extend a short way towards the beak on the 

 ventral valve, and one obscure rounded mesial ridge extends 

 nearly to the beak on the dorsal valve. 



This species closely resembles the A. hastata (Sow.) of the Bri- 

 tish mountain limestone, and may have been confounded with it ; 

 it is however perfectly well distinguished by the character of the 

 front margin, which in A. hastata is straight and even, but is 

 elevated and bent into a double fold in the Australian species, 

 somewhat as in the less exaggerated varieties of the Terebratula 

 biplicata (Sow.) of the oolites (from which it is known by its 

 imperforate beak, &c.) ; also both valves of the A. hastata are 

 plano-concave towards the front margin, while the dorsal valve 

 of the present species presents an obtuse mesial convexity. 

 Length 1 inch 1 line, width 10 lines, thickness 7 lines. 



Common in the dark limestone of Black Head, N. S. Wales, in 



