No. n. 



ABSTRACT OF THE PROCEEDINGS 



OF THK 



Hi 



ZOOLOGICAL SOCIETY OF LONDON. 



May 11th, 1909. 



Prof. E. A. MiNCHiN, M.A., Yice- President, 

 in the Chair. 



Mr. R. H. BuRNE, M.A., F.Z.S., exhibited a series of specimens, 

 from the Museum of the Royal College of Surgeons, of adaptive 

 structures for the respiration of air in some Aquatic Invertebrates 

 and tropical Freshwater Fishes. 



Mr. R. I. PococK, F.L.S., F.Z.S., the Superintendent of the 

 Gardens, exhibited the slvin of a monkey representing a new 

 subspecies of Cercopithecus, brought by Capt. Boyd Alexander, 

 F.Z.S., from Lake Chad. This he proposed to name G. tantalus 

 alexandri, sepai'ating it from the typical C. tantalus from Nigeria 

 because the whiskers wei^e very long and almost wholly white, 

 a character in which it appi'oached the Abyssinian species 

 C. cethiops. 



Mr. W. F. H. Rosenberg, F.Z.S., exhibited a Rook in which 

 the upper mandible had overgi-own the lower to a remarkable 

 extent. This abnormality was evidently caused by an injury to 

 the tip of the lower mandible having deprived the upper one of 

 the opposing suiface necessary to check its growth. 



Prof. William Ridgeway, M.A., read the following papers, 

 communicated by the Secretary, entitled : — (a) " On hitherto 

 unrecorded Specimens oi Equus quagga" ; (6) " Differentiation of 

 the Three Species of Zebras " ; (c) " On a Portion of a Fossil Jaw 

 of one of the Equidos " ; and illustrated his remarks with a series 

 of lantern-slides. 



* Tliis Abstract is publisbecl by tlie Society at 3 Hanover Square, London, 

 W., ou tlie Tuesday following the date of Meeting to whicb it refers. It will 

 be issued, free of extra charge, to all Fellows who subscribe to the Publications, 

 along with the ' Proceedings ' ; but it may be obtained on the day of publication 

 at the price of Sixpence, or, if desired, sent post-free for the sum of Six 

 Shillings per annum, payable in advance. 



