148 BULLETIN OF THE MUSEUM OF COMPARATIVE ZOOLOGY. 



LITERATURE CITED. 



Alder, J., and Hancock, A. 



'55. A Monograph of the British Nudibranchiate Molhisca. London : Royal 

 Society. 



Herdman, W. A. 



'90. On the Structure and Functions of the Cerata, or Dorsal Papillse, in some 

 Nudibranch Mollusca. Quart. Jour. Micr. Sci., XXXI. 1, p. 41. 



Herdman, W A., and Clubb, J. A. 



'89. Second Report on the Nudibranchiata of the L. M. B. C District. 



Proc. Liverpool Biol. Soc,. IIL p. 225. 

 '91. On the Linervation of the Cerata of some Nudibranchiata. Quart. Jour. 



Micr. Sci., XXXIII. 4, p. 541. 



Schneider, K. C. 



'90 Histologie von Hydra fusca mit besonderer Beriicksichtigung des Ner- 

 veusystems der Hydropolypen. Arch, fiir niikr. Anat., XXXV. p. 321. 



