CONTENTS. 
I. — Eeport on the Tunicata collected during the Voyage of H.M.S. Challenger, 
during the years 1873-1876. Part II. — Ascini^ Composite. 
By William A. Herdman, D.Sc., F.L.S., F.R.S.E., Professor of Natural 
History in University College, Liverpool. 
[The Manuscri^jt icas received in Instalments between 7th January 1885 and 
18t/i January 1886.) 
II. — PtEPORT on the Holothurioidea dredged by H.M.S. Challenger, during the 
years 1873-1876. Part II. 
By H.JALMAR Theel. 
{Thw Manuscrij)t 'was received Mh June 1885.) 
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