CII. I.] FOSSILS OF THE HUNTER. 15 



Amongst these remains was also found embedded a very 

 perfect specimen of fossil vrood. I may add, that in the bed 

 of the Glindon Brook, which flows from the left bank of the 

 Hunter, rocks of aroillaceous limestone are found in laroe 

 round boulders, some of which are more than J 5 feet in 

 diameter.* 



Nov. 29. — The whole ecpiipment came up at half-past 

 nine, whereupon I distributed such articles as were neces- 

 sary to complete the organization of the party, and the day 

 was passed in making various arrangements for the better 

 regulation of our proceedings, both on encamping and in 

 travellino;. I obtained from Assistant-Surveyor Dixon, then 

 employed in this neighbourhood, some account of Liverpool 

 Plains — this officer having surveyed the ranges which sepa- 

 rate these interior regions from the appropriated lands of the 

 colony. The heat of this day was exceedingly oppressive, 

 the thermometer having been as high as 100° in the shade, 

 bat after a thunder-shower it fell to 88°. 



tral ; hinge sunk, with an antiquated area and one ? or two ? large teeth in 

 each valve J ligament external, large; impressions of the ahducter museles 

 strong, nearly equal, united by the impression of the mantle, at the posterior 

 extremity of which is a small shallow sinus; no lunette. 



A genus of heavy shells in some resjiects resembling Astarte, in others 

 especially in having a striated area within the beaks, HippopocUum, from 

 which it is distinguished by the position of the umbones and the presence of a 

 thick tooth in the hinge. There appear to be four species, which may be 

 named Megadestnus globosus, (PI. II. page 14.) M. Icevis (fig. 1.) M. antlqiiatvs 

 (fig. 2.) and M. cimeatus (fig. 3. PI. III. page 1.5.) the cuneatus differs 

 from antiquatus, only in having the shell alittle contracted towards the anterior 

 side. 



The large shell (PI. IV. page 16. fig. I and 2.) is near to Isocardia, but Mr. 

 S. would not venture to say it belongs to that genus. 



The Trochus (PI. IV. fig. 3 and 4.) may be called T. Oeuhis. 



* The fossil vegetation seems to consist chiefly of the Glossopteris Brownii, 

 (of BrongniartJ a fern which occurs in a stratum of ironstone at Newcastle, 

 and in one of the same mineral on the southern coast, also in sandstone in the 

 valley of the Hunter, and abundantly in the shale near the coal wrought at 

 Newcastle. 



