38 



Specimens of the above species can be found in the Rex col- 

 lection in the Academy of Natural Sciences, Philadelphia, in the 

 Wingate collection now in the possession of Prof Thomas H. 

 Macbride, Iowa City, or in the wnter's collection. 



Dr. George A. Rex and Mr. Harold F. Wingate collected 

 extensively in southeastern Pennsylvania, especially about Phila- 

 delphia. The writer has collected in Clarion, Armstrong and 

 Westmoreland counties. 



The nomenclature in Macbride's North American Slime- 

 Moulds has been followed. Our thanks are due to Prof C. H. 

 Peck for identifying one species, DictydiaetJialium plunibeiim. 



KrrTANNiNG, Pa. 

 December 14, 1903. 



THE CRATAEGI OF FORT FREDERICK, CROWN 

 POINT, NEW YORK 



By W. W. Eggleston 



Two miles across Bulwagga Bay from Port Henry are the ruins 

 of Fort Frederick. Crown Point is a long tongue of clay underlaid 

 with limestone ; this is a typical place for the growth of Crataegi, 

 lime appearing to be one of the essentials in the best development 

 of the plant. The limestone soils of the Champlain and the St. 

 Lawrence valleys show a wonderful development of the genus 

 in numbers and variety and they follow so closely the limestone 

 outcrops that one cannot help feeling that there are lime com- 

 ponents in the soil wherever he finds Crataegi. 



Our first attention was called to the thorns of Fort Frederick 

 by F, H. Horsford in July, 1899. He had visited the P'ort a 

 few days before and although having but a few minutes to spare 

 found six forms. This at a time when Vermont was known to 

 have but five forms, was very surprising to us ; now that we 

 know nearly one hundred forms in Vermont we should not be 

 so easily moved. 



We have more than doubled Morsford's number and with 

 more careful search will very likely find more, liut the variety 



