CONTENTS. Vll 



Page 



XXXVII. Note on the Genus Lithostrotion. By William Lons- 

 dale, F.G.S 451 



XXXVIII. Observations on the Genus Rhizochilus of Steenstrup. 



By J. E. Gray, Esq., F.R.S., V.P.Z.S. &c. (With a Plate.) 477 



XXXIX. On the Germination of the Spore in the Conjugates. By 



the Rev. William Smith, F.L.S 480 



XL. On some new Devonian Fossils. By Frederick M'Coy, Pro- 

 fessor of Mineralogy and Geology in Queen's College, Belfast 481 



New Books : — Contributions to the Natural History of the Turbel- 



laria, by Dr. Max. S. Schulze 490 



Proceedings of the Zoological Society 493 — 499 



A Description of some of the Objects which cause the Luminosity of the 

 Sea, by Charles William Peach (with a Plate) ; Time of Spawning 

 of British Crustacea, by William Thompson ; Geographical Distri- 

 bution of Hymenoptera in Arctic North America, by Adam White, 

 F.L.S. ; Acanthus mollis, by Charles C. Babington, M.A. ; Mete- 

 orological Observations and Table 499 — 507 



Index 508 



