148 PROCEEDINGS COTTESWOLD CLUB (1908) 
DIADEMOPSIS HETTANGIENSIS, sp. nov. 
T. 7. Keynsham, near Bristol. 
Hf. Lower Lias. 
y. About marmoree. 
Colin. J. W. Tutcher. 
Syn. Pseudodiadema lobatum, Wright. Reynolds and Vaughan, 
‘* Jurassic of the South Wales Direct Line,” Quart. 
Journ. Geol. Soc., vol. Iviii. (1902), p. 720. 
Pseudodiadema nov. sp., Vaughan and Tutcher, ‘* The 
Lower Lias of Keynsham,” Proc. Bristol Nat. Soc., 
New Series, vol. x, part 1 (1903), p. 53- 
Diagnosts——Ambulacra contain two rows of small 
perforate alternating tubercles, having a few granules 
interspersed between them; pores uniserial ; inter-ambu- 
lacra contain four rows of tubercles, perforate and non- 
crenulate ; two outer rows of larger tubercles, and two 
inner rows of smaller ones, the latter represented by 
granules only in the upper part of the test; the inter- 
ambulacral tubercles are surrounded by thin irregular 
rings of granules; radioles slender and finely striated. 
Test small—’5 to 1'5 cms. in diameter. 
Remarks,—TVhe above description is based upon 
material contained in Mr J. W. Tutcher’s collection 
from about the base of the JZarmorea-Beds at Keynsham, 
near Bristol. Other records are from the “ Echinid- 
Bed” (base of Angulata-Zone), Bedminster Down, near 
Bristol ; Czdarvzs- Shales (about marmoree), railway- 
cutting, Sodbury, near Bristol; and from the A/armorea- 
Beds at Bitton, near. Bristol. 
I have also examined a specimen from the Czdarvs- 
Shales at Lilliput Railway-Cutting, near Yate, Gloucester- 
shire. This specimen, which is now in the possession 
of Mr L. Richardson, was named Pseudodzadema lobatumn, 
Wright, by Dr Vaughan. It is somewhat larger than the 
average examples of Dzademopsis hettangzensis, and does 
not appear to have quite so many granules; there can be 
little doubt, however, that it belongs to this species, or is 
very closely allied to it. 
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