CONTENTS. V 



Page 

 Proceedings of the Botanical Society of Edinburgh ; Linnaean Society ; 



Zoological Society 202—225 



Descriptions of Owls presumed to be undescribed, by John Cassin ; 

 Descriptions of new Marine Shells, by T. A. Conrad ; Meteoro- 

 logical Observations and Table 225 — 232 



NUMBER XXII. 



XXIV. Description of two new species of Floscularia, with remarks. 

 By W. Murray Dobie, M.D., F.B.S.E., Member of the Royal Medical 

 and Clinical Societies of Edinburgh. (With a Plate.) 233 



XXV. Observations on Mr. Hancock's paper on the Excavating 

 Sponges. By John Morris, F.G.S 239 



XXVI. On the Branchial Currents of the Bivalve Mollusca. By 

 Joshua Alder, Esq 242 



XXVII. Description of three new Genera and Species of Snakes. 



By J. E. Gray, Esq 246 



XXVIII. Contributions to the Botany of South America. By John 

 Miers, Esq., F.R.S., F.L.S 248 



XXIX. On the extinct and existing Bovine Animals of Scandinavia. 



By Prof. Nilsson of Lund 256 



XXX. Observation of some of the Phases of Development of the 

 Trichodina pediculus (?). By J. T. Arlidge, A.B., M.B. (Lond.j, 

 Member and Student in Anatomy of the Royal College of Surgeons. 

 (With a Plate.) 269 



New Books : — The Rudiments of Botany : a familiar Introduction to 



the Study of Plants, by A. Henfrey, F.L.S. &c 274 



Proceedings of the Linnaean Society; Zoological Society 275 — 296 



On the Velvet-like Periostraca of Trigona, by J. E. Gray, Esq. ; The 

 Tortoise-shell of Celebes ; Notice of some Mollusca recently taken 

 by George Barlee, Esq., off Lerwick, by J. G, Jeffreys, Esq., 

 F.R.S. ; Descriptions of new Freshwater Shells, by T. A. Conrad; 

 Meteorological Observations and Table , 296 — 304 



NUMBER XXIII. 



XXXI. Notice of the occurrence on the British coast of a Burrow- 

 ing Barnacle belonging to a new Order of the Class Cirripedia. By 

 Albany Hancock, Esq. (With two Plates.) 305 



XXXII. Note on the genus Siphonofreta, with a description of a 

 new Species. By John Morris, F.G.S. (With a Plate.) 315 



