90 Correspondence. 
stone of Ankerdine Hill (south flank), near Bromyard (Herefordshire). 
A rock literally composed of casts of the sheaths of Tentaculites cer- 
tainly exhibits a curious zoological condition of a Silurian shore. 
3. Is the rock of the ‘Church-hill quarry’ at Leintwardine of 
‘Aymestry Limestone’ age, or ‘Lower Ludlow’? I am aware that, 
until lately, its position as a ‘ Lower Ludlow’ rock was unimpugned ; 
but the discovery of Pteraspis Ludensis, the earliest (at present) 
known Fish, renders it desirable that the question of relative age 
should be cleared up. 4. Another enquiry, prompted by the fossil con- 
tents of a rock exposed near to Leintwardine, I wish also to make, 
both for my own information, and also as suggestive of research. 
When are the ‘branched Graptolites’ discovered some few years 
ago by Mr. Alfred Marston, in Lower (?) Ludlow rock near Bur- 
rington, to be figured, and collated with the species described by 
Professor James Hall (who certainly is the first geologist who has 
pieced the fragmentary relics of these curious animals together, and 
presented us with the entire form) in ‘Decade No. 2’ of the Geo- 
logical Survey of Canada? 5. The Ludlow district is so rich in 
Upper Silurian fossils, that I cannot pass it over, even in thought, 
without calling attention to some new, large-sized, and certainly 
undescribed Pteropeda from Upper and Lower Ludlow rocks, which 
are now in the cabinets of my friend Mr. Lightbody of that town. 
Mr. Henry Woodward has behaved like a father to the Pterygotus 
family, and I trust he may be inclined to place the Silurian Ptero- 
pods in an equal position of comfort and esteem. 
6. While remarking upon rocks which lie next above the ‘ Wenlock 
Series,’ I would suggest that it would be very desirable to tabulate 
the genera and species of Corals which range upwards from the 
limestones of that great Silurian zone into the more arenaceous rocks 
of the ‘Lower Ludlow.’ Certainly they are but few, and these pro- 
bably merely the species best calculated, by their life-characters, to 
live in a changed habitat ; but as such study may be taken as one 
of the many hundred which palzo-zoological science evolves from 
our ancient rock-material, it cannot be overlooked. 7. Before leaving 
Silurian paleontology, I should like to express a hope that some 
record may yet be taken of the most wonderful—for so it was—rich- 
ness of the comparatively thin band of Lower Wenlock Shales 
pierced during the making of the tunnel through the Malvern Hills. 
As yet I have seen no paper describing the fossils, several of which 
are quite new to Britain, discovered during the progress of the work; 
and, although the major part of the treasures thus secured are safe 
in the cabinets of my friend Dr. Grindrod, of Great Malvern, I think 
some record of their discovery should be drawn up so as to introduce 
them to their kindred, immortalised in the pages of ‘ Siluria.’ 
8. ‘ The Old Red Sandstone’ is a field of enquiry which would easily 
furnish, of itself, a volume of ‘ Notes and Queries.’ The singularly 
diverse conditions under which rocks, probably of contemporaneous 
age, were deposited, and the, as yet, remarkable discrepancies between 
the paleontological values of rocks lying within its limits, both 
relatively to each other and with reference to their mineral character, 
