RECORDS OF MEETINGS 353 



not adequate to predict the conditions under which this rock is formed 

 in nature. 



The field studies furnish irrefutable evidence that the majority of the 

 dolomites examined have resulted from the alteration of limestone. This 

 evidence consists of the lateral gradation of layers of dolomite into lime- 

 stone, sometimes very abruptly; the mottling of limestone by irregular 

 patches of dolomite; the existence of remnants of unaltered limestone iit 

 masses of dolomite; the irregular boundary between beds of limestone and 

 of dolomite ; the presence of altered oolites in some dolomites ; the pro- 

 tective effect of shale beds; and the obliteration of structures. The con- 

 clusion was reached that the alteration must have proceeded in most cases 

 while the limestone was still beneath the sea, but it was admitted that 

 ground water was capable of producing local dolomitization under favor- 

 able conditions after emergence. 



The Section then adjourned. 



A. B. Pacini, 



Secretary. 



SECTION OF BIOLOGY 



9 March, 1914 



Section met at 8:15 p. m.. Professor Eaymond C. Osburn presiding. 

 The minutes of the last meeting of the Section were read and approved. 

 The following programme was then offered: 



G.S.Huntington, 'I'm: Ilio-colic Juxction ix Vertebrates fi;(1]\i 



THE Standpoint of Taxonomy and Function. 



H. von W. Schulte, Tjfe Development and Anatomy of the Sali- 

 vary Glands in Certain Mammalian Orders. 



Summary of Papers 



Professor Huntington gave a review of the more important results 

 which had been based on the study of an extensive series of anatomical 

 preparations of the ilio-colic region in representative vertebrates, in the 

 College of Physicians and Surgeons. He discussed the relation of form 

 and function and the several homologies of the parts of the ilio-colic re- 

 gion in many fishes, amphibians, reptiles, birds and mammals. 



Professor Schulte 's paper summarized the investigations of Dr?;. 

 Huntington, Schulte and Carmalt, published by the Columbia University 

 Press, 1913 (Vol. IV of Studies in Cancer and Allied Subjects Con- 

 ducted under the George Crocker Special Research Fund at Columbia 

 University). 



