442 SHIMER. 



the lists of species from Muddy River, Charles River and City Point, 

 as published by Warren Upham, are based on specimens in the Boston 

 Society of Natural History and the Massachusetts Institute of Tech- 

 nology, unless otherwise stated; these were largely collected by the 

 late Professor Henry W. Haynes. The principal original contribution 

 in this paper, however, regards the Back Bay region of Boston. The 

 recent excavation of the Boylston Street Subway* of the Boston 

 Elevated Railway Company gave many sections down through the 

 Post-Glacial mud to the Glacial clay. These sections and their in- 

 cluded organic remains proved so interesting that this record of them 

 was kept. 



I wish to express my indebtedness to the following, — to the various 

 officers in charge of the Boylston Street Subway excavations, who were 

 always most courteous and helpful, especially to Messrs. L. S. Stone, 

 J. H. O'Connor, J. T. Frame, and F. H. Eichorn; to Mr. C. W. 

 Johnson, Curator of the Boston Society of Natural History, for giving 

 me opportunity to study the Muddy River, Charles River and City 

 Point fossils in the Society's collection, as well as for identification 

 of some species and aid in the revision of the nomenclature; to ]Mr. 

 F. N. Balch for permission to make use of his notes upon early colonial 

 records of shell-fish; to Rev. H. W. Winklev for his kindness in com- 

 paring our specimens of the Pyramidellidae with those in his large 

 private collection; to Mr. Wm. F. Clapp of the Museum of Compara- 

 tive Zoology for his helpful criticism, and especially for his discovery 

 and description of the minute new species of Vitrinella; to Mr. G. B. 

 Reed of Harvard University for examination of the peat; to Dr. 

 Willoughby, Curator of Peabody Museum, Harvard University, 

 for information concerning the fishweir found in the Boylston Street 

 Subwa}' and for suggestions on the comparison of this wood with that 

 used by early man elsewhere; anfl to tlie Bostonian Society for 

 permission to make a copy of the DeCosta map (1775) of Boston and 

 vicinity, now in the Old State House. 



The sections are arranged in order from that of Muddy River 

 (section 1) at the west to that of City Point (section 7) at the east 

 (see map). 



Description of Sections. 



1. Muddy River, from iirookline northeastward. The collec- 

 tions here were made mostly from a trench, averaging 16 feet in depth, 

 extending along Muddy River from Brookline to Longwood and then 



* Comi)leted in 1914. 



