4 TRANSACTIONS OF THE [OCT. 13^ 



October 13th, 1890. 

 Stated Meeting. 

 The President, Dr. Newberry, in the chair. 

 About twenty-five persons present. 

 The minutes of October 6th were read and approved. 

 The following paper was read by title : 



CONTRIBUTIONS TO INVERTEBRATE PALEONTOLOGY. 

 BY PROF. R. P. WHITFIELD. 



Mr. L. H. Jacoby exhibited two fine specimens of crocido- 

 lite from the Orange Free State, Africa, one in the rough, the 

 other a polished sphere. The exhibitor said that he had pur- 

 chased the specimens, and could not give the locality from which 

 they came. Dr. Newberry explained the composition and 

 physical character of the mineral, and stated that nothing was 

 known of the existing deposits. 



The following paper was then read by Dr. John I. North- 

 rop : 



NOTES on the GEOLOGY OF THE BAHAMAS. 



(Abstract.) 



By far the greater number of the islands known as the Baha- 

 mas, are situated on the Great and the Little Bahama Banks. 

 The former occupies a large area southeast of Florida and north 

 of Cuba, and is penetrated in the northern part in a remarkable 

 manner by a tongue of the ocean in which the water is over 

 seven hundred fathoms in depth. Little Bahama Bank lies 

 north of the Great one and is much smaller. 



The islands lie, almost without exception, on the northern and 

 eastern edges of the banks, the main exception being the island 

 of Great Bahama, which is situated on the southern edge of Lit- 

 tle Bahama Bank. Southeast of the Great Bank is a small one, 

 on which are Crooked and Acklin islands, the former on the 

 northern, the latter on the eastern edge. 



The Caicos Bank lies still farther southeast and contains on 

 its northern border a number of small islands. The rest of the 



