THE BULLETIN OF THE BRITISH MUSEUM 
(NATURAL HISTORY), instituted in 1949, 1s 
issued in five series corresponding to the Departments 
of the Museum, and an Historical series. 
Parts will appear at irregular intervals as they 
become ready. Volumes will contain about three or 
four hundred pages, and will not necessarily be com- 
pleted within one calendar year. 
In 1965 a separate supplementary series of longer 
papers was instituted, numbered serially for each 
Depariment. 
This paper is Supplement No. 6 of the Geological 
(Palaeontological) series. The abbreviated titles of 
periodicals cited follow those of the World List of 
Scientific Periodicals. 
World List abbreviation 
Bull. Br. Mus. nat. Hist. (Geol.) Suppl. 
© Trustees of the British Museum (Natural History) 1969 
TRUSTEES OF 
THE BRITISH MUSEUM (NATURAL HISTORY) 
Issued 19 September, 1969 Price £4 15s. 
