xii CONTENTS 



XLV 



PAGE 



REVIEW OF DR. HANNOVER'S MEMOIR : " UEBER DIE ENTWICKELUNG UND 



DEN BAU DES SAUGETHIERZAHNS " ... ... . 47^ 



Quarterly Journal of Microscopical Scieiue, vol. v. i857)/A 166-171. 



XLVI 



LETTER TO MR. TYNDALL ON THE STRUCTURE OF GLACIER ICE . 482 



Philosophical Magazine, vol. xiv. 1857,//. 241-260. 



XL\'II 



ON CEPHALASPIS AND PTERASPIS . . 502 



Quarterly Journal of the Geological Society, vol, xiv. 1858,//. 267-2S0. 



XLVIII 



OBSERVATIONS ON THE GENUS PTERASPIS 517 



British Association Report, 185S, /A ii. pp. 82-83. 



XLIX 



ON A NEW SPECIES OF PLESIOSAURUS (P. ETHERIDGIl) FROM STREET, NEAR 

 GLASTONBURY ; WITH REMARKS ON THE STRUCTURE OF THE ATLAS 

 AND AXIS VERTEBR/E AND OF THE CRANIUM IN THAT GENUS . . . 522 

 Quarterly Journal of the Geological Society, vol. xiv. 1858, pp. 281-294. 



L 



ON THE THEORY OF THE VERTEBRATE SKULL . 538 



Proceedings of the Royal Society, vol. ix. 1S57-59, //. 381-457; Annals 

 and Magazine of Natural History, vol. Hi. 1859,//. 414-439. 



