1921] Thaxter,— Lincoln Ware Riddle 183 



but a single year when he was attacked by the long illness which 

 terminated fatally on the Kith of January last. 



Dr. Riddle always took an active interest in the affairs of the 

 New England Botanical Club, and was its Cryptogamic Curator 

 from 1910 to 1917; its President from 1917 to 1920, and shortly before 

 he was t; ken ill, had been chosen an associate editor of Rhodora, 

 to fill the vacancy left by the death of Mr F. S Collins. He was 

 also associate editor of the Bryologist from 1911, a Fellow of the 

 American Academy of Arts and Sciences and member of the Botanical 

 Society ol America. 



His published work deals almost entirely with systematic Lichen- 

 ology, although, in his last published paper on Aerospermum, he had 

 begun to carry out his purpose of turning his attention to other 

 fields. The list of his publications is as follows: 

 19(Xi. Contributions to the Cytology of the Entomophthoraceae : 

 Preliminary Communication. Rhodora 8: 67-68. 

 On the Cytology of the Entomophthoraceae. Proc. Am. 

 Acad. Arts & Sci. 42: 177, Plates 1-3. 

 1907. Notothylas orbicularis in Massachusetts. Rhodora 9:219. 



1909. Notes on some Lichens from the (iaspe Peninsula. Rho- 



dora 11: 100. 

 A Key to the Species and Principal Varieties of C adonia 



occurring in New England. Rhodora 11: 212. 

 Check-list of New England Cladoniaceae. Rhodora 11: 



215. 



1910. The North American Species of Stereoeaulon. Bot. Gazette 



50: 285. 

 Review of Fink's Lichens of Minnesota. Bryologist 13: 97. 



1911. Tie Rediscovery of Parmelia lophyrea Ach. Bryologist 



14: 35. 

 Review of Herre's Lichen-Flora of the Santa Cruz Peninsula. 



Bryologist 14: (i. 

 Geographical Distribution of Lichens in Maine [Abstract] 



Bull. Jossclyn Bot. Soc. Maine 4: 9-10. 



1912. An Enumeration of Lichens Collected by Clara Eaton Cum- 



mings in Jamaica. Mycologia 4: 125. 

 Review A Recent Contribution to the Ecology of Mosses. 

 Bryologist 15: 07. 



