CONTENTS. 



PART III.— 1858. 



I 



XII. Observations on Entozoa, lolth notices of several neio species, hicludinr/ on account 



of two experhjients in regard to the breeding of Ttenia serrata and T. cuciimerina. 

 By T. Spencer Cobbold, M.D., F.L.S. page 155 



XIII. On the Arrangement of the Cutaneous Muscles of the Larva ©/"Pygsera bucephala. 

 Byioni!i'LTJ-amcK,Esq.,F.B.S.,F.L.S.,F.G.S.8rc 173 



XIV. On the Agamic Reproduction and Morphology of Aphis. — Part I. By Thomas 

 H. Huxley, F.B.S., Professor of Natural History, Government School of 3Hnes. 

 Communicated by G. Busk, F.B.S., F.L.S. 193 



XV. On the Agamic Reproduction and Morphology of Aphis. — Part II. By Thomas 



H. Huxley, F.B.S., Professor of Natural History, Government School of Mines. 

 Communicated by G. Busk, F.R.S., F.L.S. 221 



XVI. On the external Anatomy and Natural History of the Genus of Annelida named 

 Palolo by the Samoans and Tonguese, and Mbalolo by the Fijians. By John 

 Denis Macdonald, Assistant- Surgeon of H.M.S. 'Herald,' employed on Survey- 

 ing Service in the South-icestern Pacific, under the command of Captain H. M. 

 Denham, B.N., F.B.S. Communicated by G. Busk, F.B.S., F.L.S. ... 237 



XVII. On the probable Metamorphosis of Pedicularia and other forms ; affording pre- 

 sumptive evidence that the Pelagic Gasteropoda, so called, are not adult forms, 

 but, as it were, the Larva: of well-known genera, and perhaps confined to species 

 living in deep water. By John Denis Macdonald, Assistant-Surgeon of H.M.S. 

 ' Herald,' employed on Surveying Service in the South-icestern Pacific, under the 

 command of Captain H. M. Denham, R.N., F.R.S. Communicated by G. Busk, 

 F.R.S., F.L.S. 2il 



XVIII. On the Anatomy of Eurybia Gaudichaudi, as bearing up)on its Position amongst 

 the Pteropoda. By John Denis Macdonald, Assistant-Surgeon of H.M.S. 

 ' Herald,' employed on Surveying Service in the South-icestern Pacific, under the 

 command of Captain H. M. Denham, R.N., F.R.S. Communicated by G. Busk, 

 F.R.S., F.L.S 2io 



[IX. Notes on Phoronis hippocrepia. By F. D. Dystek, Esq., F.L.S 251 



[X. Synopsis of the Fructification of the Compound Spliserise of the Hookerian Herba- 

 rium. By Frederick Currey, Esq., M.A., F.R.S., F.L.S 257 



