LIST OF PUBLICATIOIsrS. 



219 



WALCOTT, Chaeles D. Cambrian 

 geology and paleontology, IV, No. 6. 

 Middle Cambrian Spongiae. 



Smithsonian Misc. CoU-, 

 vol. 67, no. 6, 1920. 

 pp. 261-364, pis. 60- 

 90, text flgs. 1-10. 



WALKER, Bkyant. A new fresh- 

 water moUusk from Indiana. 



Proc. U. S. Nat. Mus., 

 vol. 57, no. 2321, 

 Sept. 9, 1920, p. 525. 

 1 fig. 



WAYNE, Arthub T. The russet- 

 backed thrush (Hylocichla ustulata 

 ustulata) taken near Charleston, 



S. O. 



Auk, vol. 37, no. 3, 

 July, 1920, pp. 465, 

 466. 



WEATHERBY, C. A. Varieties of 



Pityrogramma triangularis. 



Rhodora, vol. 22, no. 

 259, July, 1920, pp. 

 113-120. 



WELD, L, H. American gallflies of 

 the family Cynipidae producing sub- 

 terranean galls on oak. 



Proc. U. S. Nat. Mus., 

 vol. 59, no. 2368, 

 June 27, 1921, pp. 

 187-246, pis. 28-37. 



WETMORE, Alexander. The knot in 



Montana. 



Auk, vol. 37, no. 3, 

 July, 1920, p. 451. 



WETMORE, Alexander. The wing 

 claw in swifts. 



Condor, vol. 22, no. 6, 

 Dec. 4, 1920, pp. 197- 

 199. 



Five new species of birds 



from cave deposits in Porto Rico. 



Proc. Biol. Soc. Wast^ 

 ington, vol. 33, DeCt 

 30, 1920, pp. 77-81, 

 pis. 2, 3. 



WILSON, Charles B. The copepod 

 parasites (in "Lake Maxinkuckee, a 

 physical and biological survey " ) . 



Dept. of Conservation, 

 State of Ind., pub. 

 no. 7, vol. 2, 1920, 

 pp. 79-82. 



New species and a new genus 



of parasitic copepods. 



Proc. U. 8. Nat. Mus., 



vol. 59, no. 2354, 



June 10, 1921, pp. 



1-17, pis. 1-7. 



YOKOGAWA, Sadamu. A new nema- 

 tode from the rat. 



Journ. Parasitol., vol. 



7, no. 1, Oct., 1920, 



pp. 29-33, pis. 6, 7, 



flgs. 1-4. 



YUNCKER, T. G. Revision of the 



North American and West Indian 



species of Cuscuta. 



Univ. III. Biol. Monogr., 

 vol. 0, nos. 2, 3, 

 Mar. 1, 1921, pp. 

 1-14, pis. 1-13. 



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