VI CONTENTS. 



Page 

 XXXI. Reply to Sir Philip Egerton's Letter on the Placoderml By 

 Frederick M'Coy, M.G.S. &N.H.S.D. &c 277 



Proceedings of the Zoological Society 280 — 292 



On the Red Corpuscles of the Blood of the Mud-fish ( Lepidosiren an- 

 nectens), by Andrew Smith, M.D., Deputy Inspector-General of 

 Hospitals, and George Gulliver, F.R.S., Surgeon in the Royal 

 Horse Guards ; Filago apiculata, G. E. Smith, by Ch. C. Babing- 

 tou, M.A. ; Note on the genus Allorisma, by William King, Esq. ; 

 Melilotus arvensis, Wallr., by Ch. C. Babington, M.A. ; On the 

 Parasitical Habits of Scrophularineee, by Professor Henslow ; Me- 

 teorological Observations and Table 292 — 29G 



NUMBER XI. 



XXXII. On some new Ichthyolites from the Scotch Old Red Sand- 

 stone. By Frederick M'Coy, M.G.S. & N.H.S.D. &c 297 



XXXIII. On an apparently undescribed state of the PalmellecB ; 

 with a few observations on Gemmation in the lower tribes of Plant?. 

 By G. H. K. Thwaites, Lecturer on Botany and Vegetable Physio- 

 logy in the Bristol Medical School. (With a Plate.) 312 



XXXIV. Remarks on the ' Observations sur YOrnithorhynque' par 



M. Jules Verraux. By Prof. Owen, F.R.S 317 



XXXV. An Account of the Germination of Tsoetes lacustris. By 

 Karl Muller. (With two Plates.) 322 



XXXVI. On the recent species of Odostomia, a genus of gaste- 

 ropodous Mollusks inhabiting the seas of Great Britain and Ireland. 



By J. G. Jeffreys, F.R. & L.S 330 



XXXVII. Notices of British Shells. By J. G. Jeffreys, F.R.S... . 351 



Proceedings of the Linnaean Society 352 — 357 



How to prevent the Attacks of the Bed-bug, Cimea lectularius, by 

 John Blackwall, F.L.S. ; Notice of an English locality for Helix 

 revelata, Ferussac ; Colossal Bones of the Iguanodon ; Extracts 

 from a Letter to Thomas Bell, Esq., F.R.S., from George Clark, 

 Esq., of Mauritius; A Comparison between Sterna Cantiaca, Gin., 

 of Europe, and Sterna acufiavida, hitherto considered identical with 

 S.Cantiaca, and a description of a new species of Wren, by Dr. Cabot; 

 Description of a new species of Voluta, by W. J. Broderip, Esq., 

 F.R.S. &c. ; Extract from a Letter addressed, in June 1848, by 

 Dr. Augustus A. Gould, of Boston, United States, to Wm. Thomp- 

 son, Esq., Belfast ; Meteorological Observations and Table 357 — 368 



