CONTENTS. Vll 



Piige 

 Netc Book : — Annual Report of the United-States Geological and 

 Geographical Survey of the Territories, embracing Colorado and 

 parts of adjacent Territories, being a Report of Progress of the 

 Exploration for the year 1874, by F. V. Hayden, United-States 

 Geologist 425 



Zoology of the ' Challenger' J^xpedition, by P. Martin Duncan, 

 F.R.S., Pres. Geol. Soc. ; On the Modifications undergone by 

 the Ovum of the Phanerocarpal Medmce before Fecundation, by 

 M. A. Giard; Note on Vertigo Moulinsiana, Dupuy, by J. 

 Gwyn Jeffreys, F.R.S. ; Sponges dredged up on board H.M.S. 

 'Porcupine' in 18G9-70, by H. J. Carter, F.R.S. &c. ; On the 

 first Phenomena of the Development of Helmuts miliaris, by 

 M. A. Giard ; the late John Leckenby, Esq., F.G.S.,F.L.S. 429— 43G 



NUMBER CXIV. 



XLIV. On the Variability of the Species in the case of certain 

 Fishes. By Dr. V. Fatio 437 



XLV. Descriptions of several African and Australian Lepidoptera 

 in the Collection of the British Museum. By Arthur G. Butler, 

 F.L.S., F.Z.S., &c 458 



XLVI. On Ascodictyon, a new Provisional and Anomalous Genus 

 of Palseozoic Fossils. By H. Alleyne Nicholson, M.D., D.Sc, 

 F.R.S.E., and R. Etheridge, Jun., F.G.S. (Plate XIX.) 463 



XL VII. On tbe Ulateridts of New Zealand. By D. Sharp 469 



XLVIII. Description of a new Species of Phasmidce from the 

 Malay Peninsula. By Prof. .J. Wood-Mason, Deputy Superinten- 

 dent, Indian Museum, Calcutta 487 



XLIX. Diagnoses of new Species of Pleurotomidte in the British 

 Museum. By Edgar A. Smith, Zoological Department 488 



Ij. On Rtqjertia dnhilis, a new Sessile Foraminifer from the North 

 Atlantic. Bv G. C. Wallich, M.D., Surgeon-Major Retired List, 

 H.M. Indian Army. (Plate XX.) 501 



New Book : — The Ancient Life-History of the Earth. By Prof. H. 



A. Nicholson, M.D., D.Sc, &c 605 



Zoology of the ^Challenger' Expedition, by P. Martin Duncan, 



F.R.S., Pres. Geol. Soc. ; On a Newt from the Darjiling 

 Hills, by Prof. J . Wood-Mason ; On the Value of certain Argu- 

 ments of Transformism derived from the Evolution of the Den- 

 tary Follicles in the Ruminants, by M. V. Pietkiewicz . . 506 — 510 



Index 512 



