viii CONTENTS. 
Page 
LIV. On some Hydrocorallinse from Alaska and California. By 
PN cel bete ASAT Ge Yh ae RM abs se Wicwele 8 ADAM MURS See ckyntls 467 
LV. Descriptions of Paleeozoic Corals in the Collections of the 
British Museum (Nat. Hist.)—No.I. By Roserr ErHeripeGs, 
Jun., and ArrHur H. Foorp, F.G.S. (Plate XVIL.)............ 472 
LVI. On the Orthoptera collected during the recent Expedition of 
HLM.S. ‘ Challenger.” By W. F. Kirsy, Assistant in Zoological 
Department, British Marsewmil 9.65, <jsieiale:¢/a: «sa feo crmtedam ate ean een 476 
LVIL. Description of an African Species of the Coleopterous Genus 
Helota, MacLeay. . By As: SIDNEY QUULLEF J ¢.\5 shbe ss 0 a/c le sete ae 479 
Proceedings of the Geological Society ......ccceeeseeerees 48] —484 
New Book:—Geological and Natural-History Survey of Canada: 
Catalogue of Canadian Plants.—Part I. Polypetale. By JoHn 
Macoun, MRA; EELS: Wnne i, Aes eR re aisle chee 484 
Freshwater Sponges as Improbable Causes of the Pollution of River- 
water, by EK. Potts; On the Brain of Eunice Harassit and its 
Relations with the Hypodermis, by M. E. Jourdan; On Mana- 
yunkia, by Prof. Leidy ; On a Mediterranean Species of Lingu- 
dnopsts, by ‘Drs 1,-G; Bornemann, Jun; oes ce sss 486—490 
Indexes Ss SR at Oe Se Lid es a mae aren Ree eta tee eee ~. 401 
. PLATES IN VOL. XIII. 
git Fertilization of the Floridez. 
Til. New Polyzoa. 
IV. 
V. Spiropteris——Schutzia Bennieana. 
VI. Freshwater Sponges. 
VII. Monticuliporoid Corals. 
VIII. Grantia ciliata, 
IX. New Polyzoa. 
X. Ptycholepis gracilis. 
XI. Anacropora Forbesi, 
XI. Monticuliporoid Corals. 
se }N ew Martine Polyzoa. 
XIV. 
XV. fllustrating the Gastrea-theory. 
XVI. Lissolepis serratus. 
XVII. Paleozoic Corals. 
