CONTENTS. V 



Page 



XXIII. Description of the Lurking Machete (Mackcerium suhducens) 

 from the northern coast of New Holland. By John Richardson, M.D., 

 F.R.S. &c., Inspector of Naval Hospitals. (With a Plate.) 175 



XXIV. Additional Observations on the Polygastric Sacculi. By 

 John Wm. Griffith, M.D., F.L.S. &c 178 



XXV. Observations on the genus Mongeotia, on two new genera of 

 Freshwater Algae, and on Tyndaridea, with descriptions of species. By 

 Arthur Hill Hassall, Esq. (With a Plate.) 180 



XXVI. Note in reply to Mr. Hassall. By Prof. Edward Forbes, 

 V.P.W.S., F.L.S., F.B.S. &c 188 



XXVII. Information respecting Scientific Travellers 190 



New BooJcs .-—Die Pflanze im Momenta der Thierwerdung, beobachtet 

 von Dr. F. linger. — Recherches sur la Rubefaction des Eaux et 

 leur Oxygenation par les Animalcules et les Algues, par MM. Aug. 

 et Ch. Morren 202—207 



Proceedings of the Linnasan Society ; Botanical Society of London ; 



Zoological Society; Royal Society 207—229 



Addenda and Emendations to Mr. E. Blyth's List of Birds obtained 

 in the vicinity of Calcutta; Meteorological Observations and 

 Table 229—232 



NUMBER LXXVII. 



XXV I II. Notice of a British species of Calliopcsa, D'Orbigny, and 

 of Four new species of Eolis, with observations on the Development 

 and Structure of the Nudibranchiate Mollusca. By Joshua Alder and 

 Albany Hancock, Esqrs '. 233 



XXIX. On the Structure and Affinities of Upupa, Lin., and Irrisor, 

 Lesson. By H. E. Strickland, M.A 238 



XXX. Upon the Anatomy of P/ialangium Opilio (Latr.). By Alfred 

 TuLK, M.R.C.S., M.E.S. (With three Plates.) (Continued.) 243 



XXXI. The Birds of Ireland. By Wm. Thompson, Esq., Pres. Nat. 

 Hist. Society, Belfast. (Continued.) 254 



XXXII. Descriptions of three new species of the Coleopterous genus 

 Gyriosomus, collected in Chile by T. Bridges, Esq. By G. R. Water- 

 house, Esq., Assistant Secretary and Curator to the Zoological Society 258 



XXXIII. Description of anew Fossil Cirripede from theUpperChalk 

 near Rochester. By Mr. G. B. Sowerby, Jun 260 



XXXIV. Description of some apparently new Insects from the 

 Congo, sent to England by Mr. Curror, Surgeon R.N,, and the late 

 Mr. John Cranch. By Mr. Adam White, M.P^.SS. Lond. and Paris, 

 Assistant Zool. Dep. British Museum 262 



XXXV. Note on a Paper in * Annals and Mag. of Nat. History,' 

 vol. vii. p. 315. By Mr. Adam White, M.E.SS. Lond, and Paris, As- 

 sistant Zool. Dep. British Museum 268 



