CONTENTS. V 



Page 



XXI. On the Law of Development of the Sexes in Insects. By 

 Prof. Von SiEBOLD 205 



XXII. On some new Species of Oliva. By F. P. Marrat 212 



XXIII. On a new Genus of Gastrotrichous Rotatoria. By E. 

 CliAPAREDE 214 



XXIV. Contributions to the Study of the Entomostraca. By 

 George Stewardson Brady, C.M.Z.S. &c. No. III. Marine 

 Ostracoda from Tenedos. (Plates XIV. & XV.) 220 



XXV. Obser\'ations on the Classification of Echinida, to serve as 

 an Introduction to the Description of the Tertiary Fossil Echino- 

 dermata of Western Algeria. By A. Pomel 225 



On a Collection of Pteropods and Heteropods, by F. P. Marrat ; Ob- 

 servations on some Mammalia from the North of China, by M. 

 A. Milne-Edwards ; Notes on some Algae from a Califomian 

 Hot Spring, by Dr. H. C. Wood, Jun., Professor of Botany in 

 the University of Pennsylvania ; Description of two Sacculinidse, 

 by M. Hesse ; On the Calamites and Fossil Equiseta, by M. 

 Schimper ; On the Contractile Tissue of Sponges, by N. Lieber- 

 kiihn ; Comparative Investigation of the Generative Organs of 

 the Hare, Rabbit, and Leporide, by S. Arlong 229 — 236 



NUMBER X. 



XXVI. On the Tj^ical Value of the Lingual Dentition in the 

 right Distribution of the Genera of Gasteropoda into Natural Groups 

 and Families. Bv John Denis Macdonald, M.D., F.R.S., Staff 

 Surgeon, R.N. (Plate XVI.) 237 



XXVH. Notulffi Lichenologicee. No. XXH. By the Rev. W. A. " 

 Leighton, B.A., F.L.S. — Dr. Wm. Nylander on Lichens in the 

 Garden of the Luxembourg Palace 245 



XXVIII. Report on the Annelids dredged off the Shetland Islands 



by Mr. Gwyn Jeffreys in 1867. By W. C. M'Intosh, M.D., F.L.S. 249 



XXIX. On the Production of the Sexes in Bees. By Felix 

 Plateau, D.Sc 252 



XXX. On the manner of Fertilization of the Scarlet Runner and 

 Blue Lobelia. By T. H. Farrer, Esq 255 



XXXI. Note on a new Japanese Coral {Isis Greyorii)^ and on 

 Hyalonema. By Dr. J. E. Gray, F.R.S. &c 263 



XXXII. On a new Free Form of Hyalonema Sieboldii, and its 

 manner of Growth. By Dr. J. E. Gray, F.R.S., V.P.Z.S., F.L.S. . . 264 



XXXIII. On the Boring of certain Annelids. By W. C. M'Intosh, 

 M.D., F.L.S. (Plates XVIII., XtX., XX.) 276 



XXXIV. On the Structure of the Shells of Brachiopoda. By Dr. 

 William B. Carpenter, F.R.S 295 



