PREFACE. 
WHEN, in 1901, the Expedition of the SS. ‘ Discovery,’ under Captain Scott, R.N., 
was sent to the Antarctic Regions, the Trustees of the British Museum gave their 
assistance to this national enterprise by allowing the cases containing the natural 
history specimens which might be obtained by the Expedition to be sent to the 
Natural History Museum for unpacking and sorting. They further undertook to 
publish a detailed report on the collections so obtained, under the superintendence 
of the Director of the Natural History Departments. 
Some of the most important collections have been dealt with by naturalists who 
were members of the Expedition. Thus, the Mammals and Birds are described by 
Dr. Edward A. Wilson, the Isopoda and Pyenogonida by Mr. T. V. Hodgson, and 
the Rocks (in relation to Field Geology) by Mr. H. T. Ferrar. Other groups have 
been dealt with by members of the staff of the Natural History Departments of 
the British Museum: Mr. Boulenger describes the Fishes; Mr. E. A. Smith, the 
Gastropoda, Lamellibranchia, and Brachiopoda; Mr. Jeffrey Bell, the Echinoderma ; 
Dr. Calman, the Crustacea Decapoda, and the Cumacea; Mr. Kirkpatrick, the non- 
calcareous Sponges; whilst Mr. G. T. Prior has prepared a petrographical description 
of the Rock-specimens. 
It has been necessary to obtain the assistance of other specialists in order to deal 
with the rest of the collections. So far as the latter group of contributors is 
concerned, the following is a list of the subject-matters, together with the name of the 
naturalist who has undertaken the work in each case :— 
EMBRYOS OF SEALS. ‘ : ‘ . Dr. Marrerr Tims. 
ANATOMY OF EMPEROR PENGUIN . : . Mr. W. P. Pycorart. 
TUNICATA . : : ' ‘ , . Pror. HerpMan. 
CEPHALODISCUS . : ‘ ; : . Dr. RipEwoop. 
CEPHALOPODA ; ; , ‘ . Dr. Hove. 
NUDIBRANCHS AND PTEROPODS : ; . Srr CHarzes Extor, K.C.M.G. 
Potyzoa . , ; ; : , . Mr. H. W. Borrows. 
Eeas anp Youne oF ASTERIAS . , . Pror. MacBripe. 
AMPHIPODA . , ' ; 5 . Mr. A. O. Watxer. 
ScHIZOPODA é : : : ‘ . Me. Hott. 
NEBALIZ . : ‘ ‘ j f . Dr. J. THIELE. 
OsTRACODA i : ; : : . Pror. Brapy. 
CoPEPODA . : ‘ : : F . Dr. WoLrEenDeEN. 
