NATURAL HISTORY MUSEUMS 61 



MARYLAND 



Johns Hopkins university, Baltimore. William Bullock Clark, 

 jyr'ofessor of geology, assisted by Harry F. Reid, professor of geo- 

 logic physics; Edward B. Mathews, asmciate professor in miner- 

 alogy and petrography; George B. Shattuck, associate professor 

 of pJiysiographic geology. 



The paleontologic and geologic collections are described in the 

 university publication, Retrospect of 20 years, 1876-1896, as fol- 

 lows. 



The collections of the geological department consist primarily 

 of a large amount of material brought together from Maryland 

 and adjacent states of Virginia, Pennsylvania, Delaware and 

 New Jersey, and include representatives of most of the important 

 rock types, fossils and minerals from the several formations of 

 this territory. The collections are especially rich in crystalline 

 rocks and in Cretaceous and Tertiary fossils. Some of this ma- 

 terial has already been described, while much awaits further 

 study. In addition to the large amount of material thus brought 

 together from the surrounding region, the following special col- 

 lections form a portion of the university's possessions : 



The Williams collection contains several thousand objects, 

 consisting of extensive suites of specimens and of thin sections 

 of minerals and rocks from the best known and most thoroughly 

 studied localities in both Europe and America. They have re- 

 cently been presented to the university by Mrs Williams. 



The Lewis collections of rocks and thin sections, numbering 

 over 1000 specimens, have been deposited with the university 

 by Mrs Lewis. These specimens were collected by the late Prof. 

 H. Carvill Lewis, and include carefully selected materials, 

 especially from Pennsylvania, Germany, Switzerland and South 

 Africa. 



The Krantz collection of fossils contains several thousand 

 specimens from the best known localities in Europe, being repre- 

 sentative of all the different horizons. 



The Hill collection contains a large number of specimens of 

 rocks and characteristic fossils from the Cretaceous formations 

 of Texas, collected by Prof. R. T. Hill, of the United States 

 geological survey. It was presented to the university by Messrs 

 Jesse Tyson, Francis White, Mendes Cohn, W. T. Dixon and 

 D. C. Gilman. , 



The Stilrtz collection comprises a suite of over 400 hand speci- 

 mens and accompanying thin sections. These represent the rocks 



