252 bulletin: museum of comparative zoology. 



LITERATURE. 



Herdman, W. A. 



'82. Report ou the Tuuicata, Part I. The Voyage of H. M. S. " Challenger," 



Zoology, Vol. VI. 

 '88. Ibid., Part III, Vol. XXVII. 

 '91. A revised classification of the Tuuicata, etc. Liuuean Society's 



Journal, Zoology, Vol. XXIII. 



Metcalf, H. M. 



'93. Notes upon an apparently new species of Octacnenms, etc. Johns 



Hopkins Univ. Circ, No. 106. 

 :00. The aus.tomj o( Octacnemus puia^oniensis. Notes on the morphology 



of the Tuuicata. Zoolog. Jahrbucli, Ablh. f. Anat. und Ontogonie der 



Thiere, Bd. XIII, p. 572 and p. 519. 



Moseley, H. N. 



'76. On two new forms of deep-sea ascidians, obtained during the voyage 

 of II. M. S. "Cliallenger." Trans. Linn. Soc. London, ser. 2 (Zool.) 

 Vol. Ill, p. 287. 



Ritter, Wm. E. 



:01. Papers from the Harriman Alaska Expedition, XXIII. The ascidians. 

 Proc Washington Acad. Sciences, Vol. Ill, p. 225. 



