CONTENTS. Vv 
XXI. Submarine-Cable Fauna. By J. Gwyn Jerrreys, LL.D., 
F.R.S., and the Rev. A. M. Norman, M.A. (Plate XII.) -....... 169 
XXII. Descriptions of new Species of Polyzoafrom the Lower and 
Upper Silurian Rocks of North America. By H. ALLEYNE NiIcHoL- 
son, M.D., D.Sc., F.R.S.E., Professor of Biology in the Durham Uni- 
versity College of Physical Science, Neweastle-on-Tyne. (Plate XIV.) 177 
XXIII. On some new exotic Sessil-eyed Crustaceans. By the Rev. 
MHOMASUR, Re STEBBING, MuAt= (Plate XV IN.) ie... cea te ene: 184 
XXIV. Descriptions of some new North-American Lithobioide. 
By, ANTON; SMU MB ERG: Coys orn cielelaie 1s eleislelvielegerete!e eieitya oe cetalesio\» ais 188 
XXV. Do Varieties wear out, or tend to wear out? By Professor _ 
Jy (CUP We 7 Sob puto POO OE ConOrmaue Uel0 chris sieomtiac canoe es clomion 192 
XXVI. Oceanic Sediments, and their Relation to Geological For- 
mations. By Professor WinLiAmM Kine, Sc.D. &e. .........5.-.. 198 
= XXVII. Remarks on Professor Owen’s Arrangement of the Fossil 
Kangaroos. By GERARD KREFFT ...........00+seeeceeceeeees 204 
XXVIII. Zoologico-Embryological Investigations. By M. Ussow. 209 
XXIX. Gn some new Species of Butterflies from Tropical America. 
By ARTHUR GARDINER ButTueER, F.LS., F.Z.8., &e. ......0 0.0: 222 
Proceedimes:of the foveal Society... :.,00,00 ..anrepisc-s' awe) afc ache eiyele + 225 
On the Gammaride of Lake Baikal, by Dr. B. N. Dybowsky ; On the 
Mode in which Ameba swallows its Food, by Prof. J. Leidy ; 
On the Discovery of true Batrachians in Paleozoic Rocks, by 
M. A. Gaudry ; On the Motive Power of Diatoms, by Prof. J. 
Leidy; On the Peripheral Nervous System of the Marine 
NematoidssoyANi) A PVaMOU ies cd fc or. wsicte ve rales ac ties o's 250—235 
NUMBER LXXXVIII. 
XXX. On the Structure and Systematic Position of the Genus 
Chetrolepis. By R. H. Traquair, M.D., F.G.S., Keeper of the 
Natural-History Collections in the Edinburgh Museum of Science 
AUNT pp Act rg | CEpNae yaaa er tor svairhet oneal ote oliopeh aie auan SVT are o/b, touaale 237 
XXXI. On a new Species of Liphistius (Schiodte). By the Rev. 
OPPO Aeon Gis WE AG ACN ZG. ter breton: enge alone Sieiail sketepere: on) 9 = 249 
XXXII. On the Geographical Distribution of Fishes. By THro- 
pporom Gace mL Lae ne UPR ors ocio pido oon Sincere ian cme SO 251 
XXXII. On an undescribed Organ in Limulus, supposed to be 
Renal.in its Nature.) By Aas. PACKARD, Juny.jia. 22 oie - ode. side * 255 
XXXIV. On some Fossil Fishes from the neighbourhood of Edin- 
burgh. By R. H. Traquair, M.D., ¥.G.S., Keeper of the Natural- 
History Collections in the Edinburgh Museum of Science and Art. 
CRRTCPRV I) pitta opme sian late ns otal a sista) oetebe yet mhbaeabet = ells ta aieucieh oleh 258 
XXXV. Descriptions of new Species of Fish in the Collection of 
the British Musee, Ty AC EAB Neri.) sy .culidanmeans ieee tel < wiohde) cnineneiamand 268 
