VI CONTENTS. 



Page 



XXVIII. Remarks on a few Species belonging to the Family 

 Terebrtdcs, and Descriptions of several new Forms in the Collection 

 of the British Museum. By Edgak A. Smith, F.Z.S., Zoological 

 Department, British Museum 262 



XXIX. On the French Species of the Genus Geoyyialaciis. By 

 D. F. Heynemann, President of the German Malacozoological 

 Society, Frankfort-on-Maine 271 



XXX. Description of Laharia hemisphcerica, Gray, a new Species 

 of Hexactinellid Sponge, with Observations on it and the Sarco- 

 hexactinellid Sponges generally. By H. J. Carteb, F.R.S. &c, . . 275 



XXXI. On a Crustacean of the Genus Zia, By the Rev. Thomas 



R. R. Stebbing, M.A 286 



XXXn. Description of a new Species belonging to the Genus 

 Vitrina. By Edgak A. Smith, F.Z.S., Zoological Department, 

 British Museum 288 



XXXin. Observations on Chelonians, with Descriptions of new 

 Genera and Species. By Dr. J. E. Gray, F.R.S. &c 289 



XXXIV. Additional Notes on the Guemul. By Dr. J. E. Gray, 

 F.R.S. &c 308 



Proceedings of the Royal Society 310 



Fabulous Australian Animals, by Gerard Krefft; Preliminary De- 

 scriptions of three new Species of Cetacea from the Coast of 

 California, by W. H. Dall, U.S. Coast Survey; On Hyper- 

 metamorphosis in Palingenia viryo, and on the Analogies of its 

 Larva with the Crustacea, by M. N. Joly ; Deep-water Fauna 

 of Lake Michigan, by P. R. Hoy, M.D.. .' 315—319 



NUMBER LXV. 



XXXV. On the Primitive Cell-layers of the Embryo as the Basis 

 of Genealogical Classitication of Animals, and on the Origin of Vas- 

 cular and Lymph Systems. By E. Ray Lankester, M.A., Fellow 

 and Lecturer of Exeter College, Oxford 321 



XXXVI. On a new Australian Species of Thyrsites. By Prof. 

 Frederick M'Coy 338 



XXXVII. Notices of British Fungi. By the Rev. M. J. Berkeley, 

 M.A., F.L.S., and C. E. Broome, Esq., F.L.S. (Plates VII.-X.) . . 339 



XXXVIII. Description of two new Species of Frogs fi-om Aus- 

 tralia. By Dr. Albert Gunther, F.R.S 349 



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