328 THE AMERICAN NATURALIST. 
LIST OF PAPERS CITED. 
PERRIER (reported by Bourne and Harrington). 
'91. BENHAM, W. B. The Nephridium of Lumbricus and its Blood Sup- 
ply. Quart. Journ. Micr. Sci. Vol. xxxii, p. 293. 
'91. BOURNE, A. C. On Megascolex cceruleus and a Theory of the Course 
of the Blood in Earthworms. Quart. Journ. Micr. Sci. Vol. xxxii, 
P. 49. 
'99. HARRINGTON, N. R. The Calciferous Glands of the Earthworm, 
with Appendix on the Circulation. Journ. of Morph. Vol. xv, 
Supplement, p. 105. 
