230 SUPPLEMENT. 



that this form is distinct from G. tenuidens of the Purbeck (supra, 

 i. p. 83). 



Hah. Europe (Germany and England). 



R. 214. A series of associated specimens, comprising the nearly 

 entire second dorsal vertebra, right coracoid, right humerus, 

 distal portion of right femur, and some fragmentary bones ; 

 from the Wealden of the Isle of Wight. The dorsal vertebra 

 agrees precisely in size with the type cervical figured by 

 Koken in the ' Pal. Abhandl.' vol. iii. pi. xxxv. fig. 5 ; the 

 length of the centrum being 0,025 (0*98 inch), and its 

 transverse diameter 0,029 (1*15 inch). The agreement in 

 the length of the dorsal with that of the type cervical 

 would seem to indicate that the larger centrum figured on 

 page 333, fig. 12 of the memoir cited as a last cervical 

 belongs to a different form. The length of the coracoid 

 is 0,052 (2-05 inches), and that of the humerus 0,072 

 (2*8 inches). Fox Collection. Purchased, 1882. 



Family TELEOSAURIDiE (supra, i. p. 91). 



Subfamily MetriorhynchinjE (supra, i. p. 91). 



The following additional characters may be given 1 : — Sclerotic 

 plates in the orbit ; no dermal scutes ; mandible, at least in most 

 cases, without lateral vacuity. Eor the distinctive characters of 

 the vertebral column, limbs, and pectoral and pelvic girdles, see 

 Hulke, Proc. Zool. Soc. 1888, pp. 417-442 2 . 



Genus GEOSAURUS (supra, i. p. 271). 



Syn. Dacosaurus (supra, i. p. 92). 



Oricosaurus, in parte (supra, i. p. 95). 

 Carinae of the teeth serrated, and the enamel smooth. 



Geosaurus maximus (supra, i. p. 92). 

 = Dacosaurus maximus (I. c). 

 41802. An imperfect cervical vertebra probably referable to this 

 species ; from the Kimeridge Clay of Ely. This specimen 



1 See Quart. Jo urn. Geol. Soc. vol. xlv. p. 57. It is there stated, on the 

 evidence of Deslongchamps's figures, that the mandible of Metriorhynchus has- 

 a vacuity, but Mr. Leeds's specimens show this to be incorrect. 



2 The imperfect bone represented in fig. 1, p. 428, of that memoir as a 

 scapula is really a coracoid, with the bar of the fontanelle broken away. 



