CONTENTS OF VOL. V. 



[FOURTH SERIES.] 



NUMBER XXV. 



Page 



I. On the Organization of Sponges, and their Relationship to the 

 Corals. By Ernst IIackel 1 



II. On the Species of the (lenus Philhi/dnts found in the Atlantic 

 Islands. By D. Sharp, M.B ." 13 



III. On a Byssiferous Fossil Trigonia. By John Lycett, M.D. . 17 



IV. On the Coleoptera of St. Helena. By T. Vernon Wol- 

 LASTON, M.A., F.L.S 18 



V. Notuke Lichenologicfe. No. XXXI. By the Rev. W. A. 

 Leighton, B.A., F.L.S. , F.B.S.Ed. — On certain new Characters in 

 the Species of the Genera Nephroma (Ach.) and Nephromium, Nyl. . 37 



VT. On a new Genus of TestacellidcB in Australia. By C. Semper 42 



VII. On a new Species of the Genus PenneUa. By Edward Per- 

 ceval Wright, M.D., F.L.S., Professor of Botany in the University 



of Dublin. (Plate I.) ' 43 



VIII. On Janassa biftniuiiosa, Schlotheim, from the Marl-Slate of 

 Midderidge, Durham. By Albany IIancock, F.L.S., and Richard 

 HowSE. (Plates II. & III.) 47 



IX. Description of a supposed new Species of Pigeon. By John 

 Gould, F.R.S G2 



Deep-sea Researches, by Dr. G. C. Wallich ; On the Specific Dis- 

 tinctness of Anodonta anatina, by R. M. Lloyd ; On the Struc- 

 ture and Mode of Growth of the Scales of Fishes, by Dr. Salbey; 

 On the Anatomy of the Alcijonaria, by MM. G. Pouchet and A. 

 Myevre ; Observations on the Nasal Glands of Birds, by M. Jo- 

 bert ; On Remains of the Beaver in New Jersey, by Mason 

 C. Weld; Note on the Respiration of the Nymphse of the 

 LibelluliB, by M. Oustalet ; The late Professor Michael Sars, of 

 Christiania. by J. Gwyn Jef&eys, F.R.S C3 — 71 



NUMBER XXVI. 



X. Note on the Sponges GratjeUa, Osculina, and Cliona. By H. J. 

 Carter, F.R.S. &o 7<i 



