SECTION AT THE FKItN LEDGES. 5 1 ( J 



tliickly covered with a little Spirorbia as arc the frond* of the 



recent fucoids of the Ledges, The specimens are toon - ly 



preserved for identification. — TrUobites. Mr Payne collected 

 a minute trilobite from this bed. The specimen was Bent l»y 



I'rofessor Dawson to Mr .Salter, hut that gentleman has made 

 no mention of it in his paper. — Insect Remains! In the sum- 

 mer of 1862, I discovered an organism in lied No 2, which at 



the time I could make nothing of; hut which I have .since 

 proved to he the wing of an insect. Several weeks after, 

 I found in Bed No. 8 an unequivocal insect's wing. This 

 discovery was followed by that of others, my father, J. \Y. 

 Ilartt, finding another in this bed. 



Compact flaggy sandstone, quite ban-en . . 5 feet 10 inches. 



Plant-bed No. 3 ..... 10 „ 



Black and lead-coloured shales, quite compact in upper part, but in 

 lower very crumbling, splitting irregularly, slicken-sided, often with 

 polished surfaces, and traversed by thin quartz-veins. These shales 

 are so soft that the sea and weather have everywhere denuded them 

 to the level of the beach. There are now no exposures of the bed 

 workable. The following arc the fossils which occur in it : — 



Calamites transitions, Goeppt. Occasionally. — C. canncpfnrmis, 

 Brongn. — Aster ophyllites latifolia, Daws. Very beautiful 

 whorls of this plant are very common here, the whorls, though 

 usually detached, being sometimes found united three or four 

 together. Annidaria acuminata, Daws. Common. — Pinnu- 

 laria dispalans, Daws. Common. — Psilophyton elcgans, Daws. 

 Occasionally. — P. (?) glabrum, Daws. Occasionally. — Cordaites 

 Iiobbii, Daws. Extremely abundant, but not so well preserved 

 as in Bed No. 2. Leaves apt to be preserved as polished hands 

 of graphite, with venation obliterated. — CycloplerU obtusa, 

 Lesqx. Not very abundant. — Neuropteris polymorph^ I >aws. 

 In beautiful specimens, common. — Sphenopleria marginata, 

 Daws. Not common. — S. Haminghausii, Brongn. Not com- 

 mon. — Pecopteris [Alcthopteris) discrepans, Daws. It was 

 here that I first discovered this species. It occurs quite 

 abundantly, but always in fragments. — Cardiocarpum cornutum, 

 Daws. Quite common. — C. ubliqiium, Daws. Quite common. 



Coarse sandstone, full of obscure casts of Stern- 



bergia and Calamites . . . . .6 feet 6 inches. 



Soft shale and fissile sandstone, with Calamites . „ 3^ „ 



