CONTENTS OF VOL. V. 



[FOURTH SERIES.] 



NUMBER XXV. 



Page 



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

 Corals. By Ernst Hackel 1 



II. On the Species of the Genus Philhydnis found in the Atlantic 

 Islands. By D. Sharp, M.B 13 



III. On a Byssiferous Fossil Triyonia. 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. Notulie LichenologicfB. 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 Nephromiumj Nyl. . 37 



VI. On a new Genus of Testacellidce in Australia. By C. Semper 42 



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

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



of Dublin. (Plate I.) ' 43 



VIII. On Janassa hituminosu, Schlotheim, from the Marl-Shate of 

 Midderidge, Durham. By Albany Hancock, 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 62 



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 Alcyonaria, 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 Nymphae of the 

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

 Christiania, by J. Gwyn Jeffreys, F.R.S 68 — 71 



NUMBER XXVI. 



X. Note on the Sponges GrayeJla, Osculina, and Cliona. Bv H. J. 

 Carter, F.R.S. &c. . " ". 73 



