PLESIOCHELriD.E. 201 



Plesiochelys brodiei, Lydekker \ 



Apparently allied to the Kimeridgian P. solodurensis, but with 

 much narrower vertebral shields, in which the width only slightly 

 exceeds the length. Plastron fully ossified, narrow, with the 

 sulcus dividing the abdominal and femoral shields only slightly 

 ascending on the hypoplastrals, the postinguinal lobe long, and the 

 anal shields reaching on to the hypoplastrals. The vertebral shields 

 do not extend more than ^ across the costal bones, and the underly- 

 ing areas are but slightly fluted. 



Hab. Europe (England). 



R. 1444. Cast of the greater portion of the shell, with the component 

 bones of the carapace and anterior part of the plastron 

 dislocated, and wanting some of the neurals and almost 

 all the marginals. The original, which is the type, was 

 obtained from the Wealden of Atherfield, Isle of Wight, 

 and is in the collection of the Kev. W. P. Brodie of Eowing- 

 ton, Warwickshire. Restored figures of the carapace and 

 plastron are given by the writer in the ' Quart. Journ. 

 Geol. Soc' vol. xlv. pp. .238, 239, figs. 4, 5. The bound- 

 aries of all the epidermal shields are distinctly shown. 

 In the figure of the carapace the artist has introduced 

 12 marginals ; while in that of the plastron the femoro- 

 abdominal sulcus is represented as ascending too high. 



Made in the Museum, 1889. 



R. 583. The imperfect shell of a young individual probably belong- 

 ing to this species ; from the Wealden near Hastings, 

 Sussex. Noticed by G. A. Boulenger and the present 

 writer in the ' Geol. Mag.' dec. iii. vol. iv. p. 272, where 

 it was considered to be specifically identical with the type 

 of P. valdensis. The narrowness of the vertebral shields 

 distinguishes it, however, at once from that species and 

 allies it with the present one. The areas occupied by the 

 2nd, 3rd, and 4th vertebral shields are nearly entire ; and 

 three complete costals and marginals are preserved on the 

 right side. The plastron is imperfect, but there appears 

 to have been a small azygous shield between the pectorals. 

 Presented by Sir R. Owen, K.C.B., 1884. 



1 Quart. Journ. Geol. Soc. vol. xlv. p. 238 (1889). 



