:VIR. R. LYDEKKER ON A CHELONIAN SCAPULA. 



39 



the fossil species should be referred to CJiitra or Trionyx ; but in 

 either case its Indian affinities would be certain, since Chitra, like 

 the species of Trionyx with a divided first neural, is now confined 

 to India. 



Since we know of the existence of a divided first neural in Trionyx^ 

 and have no evidence of such a condition in Chitra, I propose to 

 refer the species represented by the specimen under consideration 

 to the former genns, with the designation T. melitensis. 



II. Scapula op Eosphargis fro^e the London Clay. 



A short time ago Mr. W. H. Shrubsole, P.G.S., submitted to my 

 notice three fragments of a large reptilian bone obtained from the 

 London Clay of Shoppej, which I soon recognized as portions of the 

 left scapula of a gigantic turtle. The fragments, which are repre- 

 sented in their approximately relative positions in fig. 2, indicate a 

 larger scapula than has hitherto come nnder my notice ; and the 

 only known turtle, from these deposits, to which they can be referred 

 is the so-called Chelone gigas of Owen, a species which I have made 

 the type of the genus Eos pJiargis, and classed among Dermochelyidce*. 

 The fragments comprise the glenoidal portion of the bone, the distal 



Pig. 2. — Ventral aspect of tlie left scapula of Eosphargis gigas, 

 from the London Clay. (One sixth of the natural size.) 



/ 



Sc, scapula; P. Cor., precoracoid ; Cor., coracoidal facet; yl., glenoid facet. 



extremity of the true scapular bar, and a considerable portion of the 

 precoracoidal bar. Among the specimens of Eosphargis gigas pre- 

 served in the British !Museum is a slab of rock, numbered 44089t, 

 which contains the imperfect bones of the pectoral girdle. In this 

 specimen there is the glenoidal extremity of a scapula (or, as it may 



* Quart. Journ. Geol. Soc. vol. xlv. p. 241 (1889). 



t See ' Cat. Eoss. Eept, & Amphib. Brit. Mus.' pt. iii. p. 226 (1888-89). 



