Correspondence — Colonel Greenwood. 239 



formations from various localities and of various composition, in which 

 he has detected organic structure, and to which he therefore assigns an 

 organic origin ; and he protested against the application of the term 

 " concretionary " to such bodies. 



3. " On the Maxillary Bone of a new Dinosaur Priodontognathus 

 Phillipsii, contained in the Woodwardian Museum of the University 

 of Cambridge." By Harry Govier Seeley, Esq., F.L.S., F.G.S., 

 Professor of Physical Geography in Bedford College, London. 



The bone described in this paper was indicated by the author in his 

 "Index to the Aves, Ornithosauria, and Beptilia in the Woodwardian 

 Museum," under the name of Iguanodon Phillipsii. Further examin- 

 ation and the detection of successional teeth resembling those of 

 Scelidosaarus, and those referred by Prof. Huxley to Acanthopholis, 

 induced him to regard the species as representing a new genus, most 

 nearly related to Hylceosaurus. The specimen consists principally of 

 the external and alveolar portion of the left maxillary bone, which is 

 4-J inches long, the alveolar part being 4^ inches, and the remainder 

 made up by a posterior spur for connexion with the malar. From the 

 middle of the upper margin springs an ascending nasal process separat- 

 ing the orbit from the nasal aperture. The presence of the posterior 

 spur, or jugal process, seems to indicate an affinity to the Iguanodontidse, 

 notwithstanding the resemblance of the teeth to those of Scelidosaurus. 

 The teeth, which are seen in their sockets, have their crowns re- 

 sembling those referred to Echinodon, Scelidosaurus, and Acanthopholis, 

 especially the last, differing chiefly by being relatively narrower, by 

 having only 5-7 denticles on each side, by wanting the thickening at 

 the base, and by terminating in a sharp point. The author described 

 in detail the characters presented by the fossil, and indicated their 

 bearing upon its systematic position. It was imbedded in a small slab 

 of yellow sandstone, which also contained a specimen of Pecten vagans, 

 and is probably of Great Oolite age. 



4. " Description of a new species of the genus Hemipatagus, Desor, 

 from the Tertiary Pocks of Victoria, Australia ; with notes on some 

 previously described species from South Australia." By P. Etheridge, 

 jun., Esq., F.G.S. 



In this paper the author described a new species of the genus Hemi- 

 patagus, under the name of H. Woodsii, and appended to this descrip- 

 tion some remarks on the characters of Psammechinus Woodsii, Laube, 

 and Micraster hrevistella, Laube, and Monostychia australis, Laube ; and 

 also a Synoptical List of the Australian Tertiary Echinodermata 

 hitherto described. 



COBBESPOlsTDElirGE. 



SUBMERGED FORESTS. 

 Sir,— In your Number for May, 1868, Vol. V. p. 244, I had 

 the honour to state that what are called " submerged forests " 

 occur without any sinking of the land or rising of the sea, and 

 that " they are all chohed-up estuaries." More at large, this was 

 first argued in the chapter on the " Travelling of Sea-beach " in "Rain 

 and Rivers." I endeavoured to show that, before the engineer with 



