1895,] ON THE -LTTSeS OF SNAKES, AMPHISB-artflD^E, ETC. 691 



between Zomba and Lake Cbilwa. The horns measured about 29| 

 inches in length, and were 16| inches apart at their upper ends. 



Col. L. H. Irby, F.Z.S., exhibited and made remarks on two 

 specimens of the Greater Bullfinch (Pyn-hula major), killed on the 

 coast of Yorkshire about 1st Nov., 1893. 



Mr. W. T. Blanford, F.E.S., exhibited and made remarks on 

 specimens of the Siberian Ibex {Capra sihirica) and the Ammon 

 Sheep (Ovis ammon), shot by Major Cumberland in the Altai 

 Mountains. 



Mr. Swale Vincent, M.B. Lond., Demonstrator of Physiology 

 and Histology, Mason's College, Birmingham, read a memoir en- 

 titled " Contributions to the Comparative Anatomy and Histology 

 of the Suprarenal Capsules."' This portion of the memoir dealt 

 with the suprarenal bodies in Fishes and their relation to the 

 so-called head-kidney. 



This paper will be printed entire in the Society's ' Transactions.' 



The following papers were read : — 



1. On the Complete or Partial Suppression of the Right 

 Lung in the AmphisbanidtB and. of the Left Lung in 

 Snakes and Snake-like Lizards and Amphibians. By 

 Gerard W. Butler, B.A., F.Z.S. 



[Eeceived June 14, 1895.] 

 (Plate XL.) 



Contents. 



Page 



I. Introductory 691 



II. A Eeview of previous Statements 693 



m. On the Complete or Partial Suppression of the Left 



Lung in Snakes 696 



(a) On a means of distinguishing the Right Lung 

 from the Left in Snakes 696 



(b) Some Remarks on Prof. E. D. Cope's Papers on 



the Lungs of Snakes 700 



IV. On the Complete or Partial Suppression of the Right 



Lung in Amphisbijenidse 702 



V. On the Smaller Size of the Left Lung in (1) certain 

 Snake-like Lizards and Amphibians and (2) certain 



Mammals 703 



VI. List of Species of Snakes and Snake-like Animals 



Examined 704 



VII. On the Rationale of the Facts recorded in this Paper... 707 



VIII. Conclusions 710 



IX. Bibliography 711 



X. Explanation of the Plate 712 



I. Inteodttctoet. 



The absence of paired symmetry in the lungs of Snakes has 

 been recognized from early times. Thus Aristotle [b.c. 384-322] 



