STOW SOTTTH-AFEICAN GEOLOGT. 



513 



•will prove to be older than the clays of the Salt-Vlei section, and 

 probably equivalent to those of Bethelsdorp. 



At one of the meetings of the Natural-History Society of Port Eliza- 

 beth, Dr. Rubidge published a section (Section S, fig. 6,3), near the Salt 

 Ylei (see a notice of their Proceedings in the ' Port-Elizabeth Tele- 

 graph'), at the top of which is a bed of clay, "No. 1, apparently about 

 one foot." This is the stratum in which Messrs. Kemsley and Burness 

 discovered the Eerns (see above, p. 510). " The stratum of clay which 

 contained the Ferns rested on a sandstone containing immense frag- 

 ments of leaflets and petioles of Zamice, mixed with pieces of wood, 

 and that on a clay with shells (TelUna, Orhicula [?], Myacites [Plevr- 

 romya], Ostrea, <fec.) ; no 2, some three feet thick. Below this was 

 a shelly sandstone, containing Turritella Ruhidgeana (Tate), with 

 imperfect specimens of Trigonia Goldfussi, and a new species of 

 Gervillia. The discovery of these shells, which are on the oppo- 

 site hill (near Mr. Graham's house) associated with Cidaris pustu- 

 lifera (Tate), at the Bethelsdorp Saltpan with the same and with 

 Crassatella comj^licata (Tate), Ostrea Jonesil (Tate), and at the Zwart- 

 kops Heights with Trigonice, Astarte, &c., is of great interest, as 

 showing clearly the relation of the whole series of the beds of the 

 ancient Mesozoic bay to each other." 



I wrote to the late Dr. Rubidge upon this subject immediately 

 after the publication of the report, to ask him his opinion whether 

 this did not confirm the conclusion I had already arrived at from 

 the study of the dip. Unfortunately I did not receive an answer. 



Distribution of Fossils in the several members of the Uitenhage Forma- 

 tion, according to the corrected lists of named species. — T. R. J. 







Species 

 yielded. 



Species 

 pecu- 

 liar. 



Community of species 

 between 



I. 



II. 

 III. 



IV. 



C 1. Near the moutli of Sun- "| 



daysRiver ( 



2. Higher up Sundays Ei- 



[^ ver J 



Zwartkops River 



r28 



62?-, 

 [46 



28 



15 



9? 



12 



29 

 9 

 9 

 3 



1 & 2 =12? 



I.& XL = 16 



I. with II. & 111= 6? 



I.&IV.= 2? 



II.&III.= 

 II.&IV.= 



ni.&iv.= 1? 



f " Lowest strata of the \ 

 \ Zwartkops Crag (cliff)" J 

 Saliferous strata 





C. Conclusion. — Let us now take a retrospect of the various fossili- 

 feroiis beds I have mentioned. In the lowest Zwartkops stratum no 

 Trigonia}, as far as I can learn, have been discovered, and certainly 

 not the Crassatella complicata, Hamites, and some other shells. As 

 we proceed upwards Trigonice become abundant, and increase in 

 number of species. Ammonites also become frequent in some strata. 

 At M'Loughlin's Bluff on the Sundays Eiver Hamites africanus, 



VOL. XXVn. PART I. 2 N 



