282 CALIFORNIA ACADEMY OF SCIENCES. 



PAPERS REFERRED TO. 



Frank E. Bebdard. Ou the Anatomy of Ociierodrilus. Proceedings 

 Koyal Society of Edinburgh. Vol. 36, pages 563 to 583. 



Frank E. Beddard. On a New Genus of Oligochretse, Comprising Five 

 New Species Belonging to the Family OcnerodrilidiB. Annals and Magazine 

 of Natural History, No. 55, July, 1892, page 74, plates vi and vii. 



Frank E. Beddard. Abstract of some Investigations into the Struct- 

 ure of the OligochiPta. Annals and Magazine of Natural History, Jan., 

 1891, p. 88. 



Daniele Rosa. Sui genere Pontodrilus, Microscolex and Photodrilus. 

 BoUettino dei Musei di Zoologia, Universita di Torino, vol. iii, No. 39, 

 Marzo, 1888. 



W. B. Benham. An Attempt to Classify Earth-worms, Quatr. Journal 

 of Microscopical Science, vol. xxxi, part ii, p. 201. 



