Contents (continued). 



March 16, 1880 {continued). 



Page 



3. On a Collection of Land and Freshwater Shells made during a short Expedition to the 



Usambara Country in Eastern Africa, with Descriptions of seven new Species. Bt 

 Alfred E. Craven, F.R.G.S., F.G.S., F.L.S., F.Z.S., &c. (Plate XXII.) ". 21(j. 



4. On the Names to be applied to certain Echinoidea. By F. Jeffrey Bell, B.A., F.Z.S. 220 



April 6, 1880. 



Mr. Arthur E. Brown. Letters from, relating to the birth of an Elephant in a menagerie 



at Philadelphia 222 



1. On the Fishes of Afghanistan. By Fkancis Day, F.Z.S 224 



2. On Ziphim novm-zealandia. By Prof. Julius von Haast, Ph.D., F.R.S., C.M.Z.S,. 



Director of the Canterbury Museum, Christchurch, New Zealand. (Plate XXIII.) 232 



3. On the Cranial and Dental Characters of the Canid.«r. By T. H. Huxley, F.R.S 238 



April 20, 1880. 



The Secretary. Report on the additions to the Society's Menagerie in March 1880 .... 288 



Prof. Owen, C.B., F.R.S. Notice of a Memoir on the new and little-known species of 



Cephalopoda .- 288 



Dr. M. Watson. Notice of a Memoir on the female organs of the Proboscidea, as observed 



in a specimen of the Indian Elephant 288 



1. On the Land-Molluscan C4enus Girasia of Gray, with Remarks on its Anatomy and on 



the Form of the Capreolus of Lister (or Spermatophore) as developed in Species 

 of this Genus of Indian Helicidae. By Lt.-Col. H. H. Godwin-Austen, F.Z.S., 

 F.R.G.S., &c. (Plates XXIV.-XXVII.) 289 



2. On the Duration of Life of the Animals in the Zoological Garden at Frankfort-on-the 



Main. By Director Dr. Max Schmidt 299 



3. On some new and little-known Spiders of the Genus Argyrodcs, Sim. Bv the Rev. 



O. P. Camhridgb, M.A„ C.M.Z.S. (Plates XXVIII.-XXX.) '......... 320 



i. On the Shells of Lake Tanganyika and of the Neighbourhood of XJjiii, Central Africa. 



By Edgar A. Smith. (Plate XXXI.) 344 



.'>. On the External and Structural Characters of the Male Spirula australis. Lam. By 



Prof. Owen, C.B.. F.R.S., F.Z.S., &c. (Plate XXXII.) 352 



