IV 
PREFACE, 
shells which he has observed during his long and careful study 
of the group. 
The other Parts, describing and illustrating the remainder of the 
Nautiloidea (including Lituitidse, Trochoceratidae, Nautilidag, and 
Bactritidae), the Ammonoidea and Dibran chiata, will follow as 
speedily as possible. 
HEXRY WOODWARD. 
Department of G-eology, 
31st Dec. 1888. 
