EDITOEIAL NOTES. 
This volume contains Parts XXXVIII. and XXXIX. of the Zoological 
Series of Reports on the Scientific Results of the Expedition. 
Part XXXVIII. — This Memou* on the Ascidih^ Composite forms the 
Second Part of Professor W. A. Herdman’s Report on the Tunicata collected 
by the Expedition. The First Part of the Report was published in 1882, as 
part of Volume VI., and Part XVII. of the Zoological Series of Reports. 
Professor Herdman is at present engaged in the preparation of the Third 
and concluding part of his Report, and it is expected to be ready for publi- 
cation early in 1887. 
Part XXXIX. — This Memoir forms the Second and concluding Part of 
Dr. Hjalmar Theel’s Report on the Holothurioidea of the Expedition. The 
First Part was published in 1882 in Volume IV., forming Part XIII. of 
the Zoological Series of Reports. 
The Synopsis will be of great and permanent value to all working 
Naturalists, and Dr. Theel is to be congratulated upon the conclusion of this 
extensive, thorough and painstaking contribution to science. 
John Murray. 
Challenger Office, 32 Queen Street, 
Edinburgh, 8fh May 1886. 
