THE ANNALS 
AND 
MAGAZINE OF NATURAL HISTORY. 
[NINTH SERIES.] 
No. 88. FEBRUARY 1921. 
eayeemian Histitay 
+“ 
( FEB 23 1921 
lay o r- 
he. 
oy 
XIII.— On a new Chelonian from the Kimmeridge 
Swindon. By CHartes W. ANpbREws, D.Sc., 
(British Museum, Natural History). 
‘ 
(Published by permission of the Trustees of the British Museum.) 
THE Chelonian remains which are the subject of the present 
notice were collected by Mr. A. D. Passmore in 1905. They 
were found at a depth of 12-14 feet in blue Kimmeridge Clay 
near the south-east corner of the Recreation Ground, Swindon, 
and close to the spot from which the skeleton of Omosaurus 
armatus was obtained some years before ; remains of Ichthyo- 
saurus and Steneosaurus were also found in the immediate 
neighbourhood. ‘The carapace and plastron, which are both 
well preserved, were lying in natural association, and from 
the included and surrounding matrix a number of bones 
of the skeleton were collected, adding greatly to the value of 
the specimen, which, in fact, appears to be by far the most 
complete Chelonian ever obtained from this horizon in 
England, although very numerous and complete specimens 
have been described by Riitimeyer and others from con- 
temporary deposits in France, Germany, and Switzerland. 
The carapace (fig. 1) is broadly cordate in outline, its length 
(351 mm.) in the middle line being slightly less than its 
greatest width (390 mm.), which occurs about the level of the 
Ann. & Mag. N. Hist. Ser. 9. Vol. vii. 10 
