VERTEBRATA. 277 



Newberry, J. 8. On a second species of Dinichthys. Proc. Lye. 

 Nat. Hist. N. York, ser. 2, pp. 149-151. 



Discovered in the Huron shale near Avon Point, Lorain County, 

 Ohio, and named Dinichthys TerrelU. In one specimen the median 

 plate of the back has a diameter of 30 inches. G. A. L. 



OwEX, Prof. RiCHAED. Monograph on the Fossil Keptilia of the 

 Wealden and Purbeck Formations. — Supplement V. Dinosauria 

 (I(/uanvdo7i), pp. 1-18, pis. i., ii. Palajont. Soc. for 1873. 



A dentary piece of the mandible of Iguanodon is figured and de- 

 scribed. Towards the symphysial end the edentulous part of the ramus 

 is curved downwards and inwards *' to meet the corresponding part of 

 the opposite ramus at a short symphysis, extending along a horizontal 

 surface, parallel with the straight lower border of the mandible. The 

 smooth canal thus formed above the symphysis indicates a relation of 

 facility in regard to the movements of protrusion and retraction of a 

 long, cylindncal, muscular tongue, probably used, like that of the 

 Giraffe and Megatherium, for the prehension of the vegetable substances 

 selected by the Iguanodon for food. It is a generic mandibular cha- 

 racter." A part of a mandibular ramus of Iguanodon Mantelli, from 

 the " Under Feather " limestone (Middle Purbeck), yields the first 

 unequivocal example of this genus from the Purbeck series. The skull 

 named Hypsilophodon Foxii by Huxley (Quart. Journ. Geol. Soc. vol. xxvi. 

 p. 3) is refigured and described. Prof. Owen proposes to unite it with 

 Iguanodon, distinguishing the species from /. Mantelli by " the defined 

 rise of the basal border of the coronal enamel on both the outer and 

 inner sides of the tooth, especially the latter ; the relatively larger size 

 and smaller number of the marginal serrations ; the larger relative size 

 and more definite median position of the primary longitudinal ridge." 

 Prof. Huxley's statement that the crown of the tooth was non-serrate is 

 contradicted. " The conformity of cranial structure, as of fundamental 

 tooth-type, between Scelidosaurus, Echinodon, and Iguanodon, now ex- 

 emplified by the small skull (pi. i. fig. 9), makes it convenient to asso- 

 ciate the genera in a section of Dinosauria, which may be termed 

 ' Pnonodontia," i. e. serrident, or saw-toothed." L. C. M. 



. Ditto. — Supplement VI. Croeodilia {Hylceochampsd), pp. 1-7, 



pi. ii. of Supplement V. figs 23-25. Pala^ont. Soc. for 1873. 



The skull of a small or young Crocodilian, from the Wealden, I. of 

 Wight, is figured and described. The occipital surface, supratcmporal 

 fossa), orbits, and palate are displayed. X pair of large vacuities, 

 bounded apparently by the palatine and pterygoid bones, may bo either 

 the palatine foramina or the posterior nares. L. C. M. 



. Monograph on the Fossil Reptilia of the Mesozoic Forma- 

 tions. — Part I. Pterosauria (Pturodactylus, Gault-Lias), pp. 1-14, 

 l)l8. i.,ii. J*ala}ont. Soc. for 1873. 



IHerodaciylus Daviesii, n. sp., is described from a mandibular sym- 

 physis and tooth found iu the Gault at Folkestone. — P. sayittirosttiSf 



I 



