REPORT OF ITATTON-AL, MUSEUM, 1923. 87 



of particular value in enlarging our series of the classic Wenlock 

 faunas, hitherto but slightly represented, while the Italian material 

 from the Miocene at Bordighera, will be useful in comparative 

 studies. 



Dr. A. F. Foerste of Dayton, Ohio, has shown his continued inter- 

 est by gifts comprising 500 Silurian fossils from southwestern Ohio, 

 Tertiary Bryozoa from Georgia, and 60 casts of Paleozoic cephalo- 

 pods made from type specimens borrowed from other muesums in 

 the course of his studies. 



The following were acquired by way of exchanges: Ordovician 

 trilobites and other fossils from Esthonia, from Institutium Geologi- 

 cum Universitatis, Tartu; representatives of Upper Paleozoic and 

 Early Mesozoic faunas from the Island of Timor, Dutch East Indies, 

 from Technische Hoogeschool, Instituut voor Mijnbouwkunde, Delft, 

 Holland; casts of type specimens of trilobites studied by Professor 

 Meneghini, from the Geological Institute, Kegia University, Pisa, 

 Italy; trilobites from the Upper Cambrian of Sweden, from the 

 Geological Survey, Stockholm : and Cretaceous bryozoans from Ger- 

 many, from Dr. F. Franke, Dortmund, Germany. 



By purchase were obtained two collections of Cretaceous fossils, 

 one from Alberta, Canada, and one from Germany; also a small 

 collection of fossil shells from the Tertiary of Hungary. 



Exhibition slabs illustrating geological phenomena, and miscel- 

 laneous carefully selected fossils, were obtained by Curator Bassler 

 from central Tennessee, and Norman H. Boss, during several short 

 trips to Chesapeake Bay, secured cetacean remains, those of 

 Ixacanthus spinosus being especially worthy of mention. 



By transfer from the United States Geological Survey, Cretaceous 

 invertebrates described by Dr. J. B. Eeeside, jr., and fossil plants 

 from the Laramie formation of the Denver Basin and Animas for- 

 mation of Colorado, described by Dr. F. IT. Knowlton, were added to 

 the collections. 



Fossil plants from Mexico, described and presented by Prof. E. 

 W. Berry, and important collections of Peruvian Carboniferous and 

 Tertiary plants, made by Dr. Harvey Bassler during two years of 

 field work in these remote regions, added material of particular 

 value to the paleobotanical collections. 



Explorations and Expeditions.— Secretary Charles D. Walcott has 

 continued explorations in the Canadian Rockies for evidence bearing 

 on the pre-Devonian formations in western Alberta and southeastern 

 British Columbia. A fine section of pre-Devonian strata was studied 

 and measured in the upper part of Douglas Lake Canyon Valley, ex- 

 tending from the base of the Devonian above Lake Gwendolvn across 

 the canyon to the deep cirque below Halstead Pass where the great 



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