CONTENTS OF VOL, Xlll. 



NUMBER LXXXI. 



Page 



I. Observations on the Structm-e and Propagation of the genus 

 Sagitta. By Charles Darwin, F.R.S., V.P.G.S. (With a Plate.)... 1 



II. On the Marine Algae of the vicinity of Aberdeen. By G. Dickie, 

 M.D., Lecturer on Botany in the University and King's College of 

 Aberdeen. (With a Plate.) 6 



III. Descriptive Catalogue of the Zoophytes from the Crag. By S. 



V. Wood, Esq., F.G.S 10 



IV. On the existence of Branchiae in the perfect state of a Neuropte- 

 rous Insect, Pteronarcys regalis, Newm., and other species of the same 

 genus. By George Newport, Pres. Ent. Soc. &c 21 



V. A List of Lichens gathered in different parts of Wales, princi- 

 pally in the neighbourhood of Barmouth, with a few casual observations 

 upon some of the species. By the Rev. T. Salwey 25 



VI. Notes on Mr. Bly th's List of Birds from the vicinity of Calcutta. 



By H. E. Strickland, M.A 32 



VII. Contributions to the Entomology of the Southern Portions of 

 South America. By G. R. Waterhouse, Esq., Assistant Secretary and 

 Curator to the Zoological Society, &c. 41 



VIII. Note upon Obisium ortkodactylum (Leach). By Alfred 

 TuLK, M.R.C.S., M.E.S Sf) 



IX. Observations on Fucus Labillardierii, Turner. By the Rev. M. 



J. Berkeley 57 



New Books : — Phycologia generalis ; oder Anatomie, Physiologie und 

 Systemkunde der Tange, bearbeitet von F. T. Kutzing. — Synopsis 

 Florae Germanicae et Helveticae, auctore G. D. J. Koch 61 — 63 



Proceedings of the Royal Society of Edinburgh ; Wernerian Natural 



History Society ; Zoological Society 65—75 



Destruction of Trees by Scolytus ; Demodex folliculorum ; Kentish 

 Birds; Description of two Green-streaked Wrasses (Labrus Une- 

 atus), Fleming; Capture of a short Sun- fish {Orthagoriscus Mola) ; 

 Obituary : — J. C. Loudon, Esq., F.L.S. ; Meteorological Observa- 

 tions and Table 75 — 80 



