422 Reports and Proceedings— 



come to the conclusion that their source is not very remote from 

 that in which they are now found. 



The mineral above mentioned as resembling vermiculite is de- 

 scribed by the authors as a new species under the name of Vaalite. 



4. " Note on a modi£ed form of Dinosaurian Ilium, hitherto 

 reputed Scapula, indicative of a new Genus, or possibly of a new 

 Order of Eeptiles." By J. W. Hulke, Esq., F.R.S., F.G.S. 



The author re-examines Mantell's " Scapula of am unknown Eep- 

 tile" = Owen's "Scapula of Megalosaurus ? ", and adduces reasons 

 for considering it to be a modified Dinosaurian ilium. He describes 

 two nQ-w examples of the bone in Dr. Wilkins's collection, contrasts 

 them with undoubted scapulae of sundry Dinosaurs and existing 

 reptiles, and proves their essential correspondence with the ilia of 

 known Dinosaurs. 



5. " Note on a Keptilian Tibia and Humerus (probably of Mylmo- 

 saurus), from the Wealden Formation in the Isle of Wight." By 

 J. W. Huike, Esq., F.R.S., F.G.S. 



In this communication the author describes two saurian limb- 

 bones, remarkable for the great expansion of iiieir articular ends, 

 and the shortness and smallness of their shaft. The features of the 

 tibia are more like those of the tibia of MylcBOsaurus than of any 

 other Dinosaur. This resemblance, and the suitability of the humerus 

 to the very massive articular end of the Hylgeosaurian scapula, dis- 

 pose the author to xefer the bones to this Saurian. 



II.— ^une 24th, 1874.— John Evans, Esq., F.E.S., President, in 

 the Chair. The following communications were read : — ■ 



1. "New Carboniferous Polyzoa." By Prof. John Young, M.D., 

 F.G.S., and John Young, Esq., F.G.S., Hunterian Museum, Glasgow 

 University. 



The authors described two new forms of Polyzoa from the Carbon- 

 iferous Limestone shales near Glasgow. For one of these they 

 proposed to form a new genus, Actino stoma, allied to Fenestella, 

 with the frond erect, and poriferous on one face only, and with the 

 fenestrules oblong. The species they named A. fenestratum. The 

 second species was described under the name of Glauconome stelUpora. 



2. " On Palmocoryne and other Polysoal Appendages." By Prof. 

 John Young, M.D., F.G.S., and John Young, Esq., F.G.S., Hun- 

 terian Museum, Glasgow University. 



The authors maintained that the structures described by MM. 

 Duncan and Jenkins under the name of PalcBocoryne are not inde- 

 pendent organisms, but mere processes of the Polyzoa on which 

 they occur, the cells at the base being only the cells of the Polyzoa. 

 They stated that the tissues of the two structures are perfectly con- 

 tinuous, that the " dactylose basal lobes " are the branches of the 

 Polyzoon of which the processes are continuations, that the stem, 

 capitulum, and branches of the processes are solid, that there is no 

 normal aperture in the oapitulum, that the stems do not always 

 bear capitula, even when they give off branches, and that in many 

 cases they are mere processes without either capitulum or branches. 

 According to their observations, the stellate processes called Palceo- 



