1870. | JUDD—NEOCOMIAN, 338 
The agreement of these strata with certain portions of the York- 
shire series is very striking and remarkable. The bed 2 is shown, 
by its petrological characters, its stratigraphical relations, and its 
characteristic fossil to be the “‘ Hunstanton Red-rock.” 
The Tock (3) is very fossiliferous. The following is a list of 
the species which have been recorded from it, excluding the doubtful 
ones (founded on the small fragments of Ancyloceras, which are very 
numerous here *). 
Belemnites jaculum, Phil. Ancyloceras (Crioceras) Emmerici, Lév. 
lateralis, Phil. (Crioceras) Puzosianus, D’ Orb. 
Ammonites speetonensis, VY. f B. (Hamites) raricostatus, Dhii. 
—— ——, var. venustus, Phil. Thracia Phillipsi, fom. 
-—— , var. concinnus, Phil. Pholas constricta, Phzv. 
— Nisus, D’ Ord. Serpula Phillipsi, Rom. 
rotula, Sow. Rhynchonella nuciformis, Sow. sp. ? 
Ancyloceras (Crioceras) Duvali, Lév. Fish-remains. 
On a comparison of this list with that given in my paper on the 
Speeton Clay 7, it will be found that of the fourteen forms twelve 
occur in our ‘* zone of Ammonites spectonensis,” some of them being 
highly characteristic of that zone. Serpula Phillipsi occurs in the 
beds immediately above those with Am. speetonensis at Speeton; but 
in my personal searches (on which alone the lists are based) I did 
not succeed in finding it lower down in the series; in Germany, 
however, this fossil certainly ranges downward to the bottom of the 
Neocomian. Concerning the fossil called Terebratula nuciformis, 
Sow., by Prof. Wiebel, I feel much doubt, but would suggest that 
it may not improbably be the Rhynchonella Renauxiana of D'Or- 
bigny. 
From the conclusive evidence just adduced, there cannot, there- 
fore, be any doubt that in the little island of Heligoland (a mere 
speck in the German Ocean) we have, preserved in a very remarkable 
manner amid the general destruction of the strata of this area, 
most interesting vestiges of the ‘“‘ Hunstanton Red-rock,” and of the 
“zone of Ammonites spectonensis” of the Yorkshire series. The 
relation of these in the island of Heligoland is precisely the same 
as in the pit above described at West Heslerton. Heligoland is 
situated 325 miles due east of Speeton, and 150 miles from the 
nearest exposure of the Neocomian beds on the Continent. 
2. Holland.—Although this country is now almost completely 
covered with drift and alluvial deposits, I found in the great Mu- 
seum of Natural History at Leyden, interesting evidences of the 
former wide extension of the Neocomian strata. Among the large 
collections of boulders in that museum are a number composed of 
a peculiar yellow limestone, precisely similar to that of Tealby, 
and in some cases enclosing specimens of the highly characteristic 
Pecten cinctus. Boulders of the same material are not rare in the 
* Vide Fr. Ad. Romer, Verst. nordd. Kreidegeb, (1841). Wiebel, Die Insel 
Helgoland (Hamburg, 1848). 
¥ Quart. Journ. Geol. Soc. vol. xxiv. p. 235. 
