CONTENTS. Vv 
Page 
XXI. On the Law of Development of the Sexes in Insects. By 
PG ey DAS IEBOMM woh. epllars) Aue laiaud ss Sona eae weed ees Neca vis ols 205 
XXII. On some new Species of Oliva. By F. P. Marrat...... 212 
XXIII. On a new Genus of Gastrotrichous Rotatoria. By E. 
ORL Oe ATR ET Oe Sieh aie ERS MESS Ok ogo yoni) ole Renae eke ce aven et Cee Se 214 
XXIV. Contributions to the Study of the Entomostraca. By 
GroRGE Stewarpson Brapy, C.M.Z.S. &. No. II. Marine 
Ostracoda from Tenedos. (Plates XIV. & XV.) ........000 0000 220 
XXV. Observations on the Classification of Echinida, to serve as 
an Introduction to the Description of the Tertiary Fossil Echino- 
dermata. of Western Algeria. By A. PoMmn....2......0620:8805 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 Algw from a Californian 
Hot Spring, by Dr. H. C. Wood, Jun., Professor of Botany in 
the University of Pennsylvania; Description of two Sacculinidee, —— 
by M. Hesse; On the Calamites and Fossil Eyuwiseta, by M. 
Schimper; On the Contractile Tissue of Sponges, by N. Lieber- 
kithn ; Comparative Investigation of the Generative Organs of 
the Hare, Rabbit, and Leporide, by 8. Arlong.......... 229—236 
NUMBER X. 
XXVI. On the Typical Value of the Lingual Dentition in the 
right Distribution of the Genera of Gasteropoda into Natural Groups 
and Families. By Joun Denis Macponaxp, M.D., F.R.S., Staff 
SUE POR, Mis Neral esate NAVE tiara teers arch isn ics ais son Goes am ee oats 237 
XXVII. Notule Lichenologice. No. XXII. By the Rev. W. A. 
Lereuton, B.A., F.L.S.—Dr. Wm. Nylander on Lichens in the 
Garden:ofethe tt mxemboure, Palace: wiinintcrcie so aie stn ih sa eels eitleceins 245 
XXVIII. Report on the Annelids dredged off the Shetland Islands 
by Mr. Gwyn Jetireys in 1867. By W. C. M‘Inrosu, M.D., F.L.S. 249 
XXIX. On the Production of the Sexes in Bees. By Fséirx 
IPRA A UO re na ar tobe tat ake MCA nace, allay! 3 ats at one ¢ eam atte ane ssh Re 252 
XXX. On the manner of Fertilization of the Scarlet Runner and 
Blue-Lobelia. By T.H., Fanrun, Bq. : 20.025 Ra es 255 
XXXI, Note on a new Japanese Coral (Lsis Gregorit), and on 
tyalonema. By Dr J. He Gays BR Se GC.) oe aes scree ce cele « 263 
XXXII. On a new Free Form of Hyalonema Steboldi, and its 
manner of Growth. By Dr. J. E. Gray, F.R.S., V.P.Z.8., F.LS... 264 
. XXXIIT. On the Boring of certain Annelids. By W.C. M‘Intosu, 
MiB aa aC lates Xe VAM XX 6 RO oe ote aly lete ge Ww a 276 
XXXIV. On the Structure of the Shells of Brachiopoda. By Dr. 
Wintiam B, CapPEnper, RS eo il Me ollk aed DORR AOR 295 
