INTESTINAL RESPIRATION IN ANNELIDS. 829 



(51) Stbpiienson, J., "On BranrMura xowerbyi Beddaid, ami on n new s])ecios of TAmnodrihis with 



distinctive charactei-s," ih., vol xlviii. pt. ii., 1912. 



(51a) "On a new species oi Branch iodrilus and certain otlier aquatic Oligochaeta, wilii niiiaiks on 



cephalisation in the Naididse," liec. Indian Mus., vol. vii. pt. iii., 1912. 



(52) Sterling, S., "Das Blutgefiisssystcin der Oligochiitcn," Jena. Zeilschr. f. Nalurw., l!d. xliv., 1909. 



(53) VEJDOVSKy, F., Beitrd</e zur verghirhimden Morphologie der Anndiden : I., Monotjraphie der 



Enchytrdiden, Prag, 1879. 

 (54) System und Morphologie der Oligochdten, Prag, 1884. 



(55) "Zur Hiimocoltheorie," Zeitsrhr. /. iriss. Zool., vol. Ixxxii., 1905. 



(56) "Zweiter Beitrag zur Hiimocoltheorie," ib., vol. Ixxxv., 1906. 



(57) WiLLKV, A., Convergence in Evoluiion, London, 1911. 



