SUPPLEMENT. 27 L 



Ichthyosaurus intermedius (supra, ii. p. 55). 

 R. 1664. One half of a split slab of rock, showing part of the 

 (Fig.) thoracic region and the imperfect left pectoral limb of a 

 small individual ; from the Lower Lias of Barrow-on-Soar, 

 Leicestershire. The other half of this specimen is pre- 

 served in the Museum at Leicester ; the present half 

 (fig. 65) is described and figured by the writer in the 

 4 Geol. Mag.' dec. iii. vol. vi. p. 389. The contour of the 

 soft parts of the paddle is clearly indicated on the matrix, 

 which also exhibits transverse striae which have been 

 regarded as the impressions of muscular bundles in the 

 postaxial flap of the paddle. 



Presented by Montagu Browne, Esq., 1889. 



Genus TEMNODONTOSAURUS, Lydekker 1 . 



Distinguished from Ichthyosaurus by its smooth and carinated 

 teeth. 



Temnodontosaurus platyodon (Conybearc). 

 Syn. Ichthyosaurus platyodon, Conybeare (supra, ii. p. 94). 

 The type species. 



Temnodontosaurus trigonodon (Theodori). 

 Syn. Ichthyosaurus trigonodon, Theodori (supra, ii. p. 105). 



Order SAUKOPTERYGIA (supra, ii. p. 118). 



Since the publication of Part II. the writer has come to the con- 

 clusion that the elements of the pectoral girdle regarded by Mr. 

 Hulke as the omosternum more probably represent the clavicles and 

 interclavicle 2 . 



Family PLESIOSAURID.E (svprh, ii. p. 120). 



Genus PLIOSAURUS (supra, ii. p. 120). 



Pliosaurus brachydirus (supra, ii. p. 123). 



Some or all of the following specimens may be referable to this 

 species. The Portlandian specimens are the only recorded examples 

 of the occurrence of this genus in that horizon. 



1 In Nicholson and Lydekker's Manual of Palaeontology, 3rd ed. vol. ii. p. xi 

 (1889). 



2 Ibid. p. 1069. 



