Moll 1 
VII. MOLLUSCA. 
BY 
E. R. Sykes, B.A., F.Z.S. 
Assisted by E. A. Smith, F.Z.S., and G. C. Crick, F.G.S. 
CONTENTS. 
Introduction 
I. Titles 
II. Biology. 
Anatomy, Physiology, &c. . 
Distribution. 
Geographical. 
Non-Marine 
Marine 
Geological 
III. Systematic. 
Cephalopoda 
Dibranchiata 
Ammonea 
Tetrabranchiata . . . . 
Gastropoda 
Pulmonata 
Stylommatophora. . . 
Basommatophora . . . 
Page 
1 
3 
29 
32 
38 
43 
48 
49 
49 
50 
50 
50 
50 
57 
Opisthobranchiata . . 
Pago 
. 58 
Nudibranchiata . . 
. 58 
Tectibranchiata . . 
. 58 
Prosobranchiata . . . 
. 59 
Pectinibranchiata . . 
. 59 
Scutibranchiata . . 
. 68 
Scaphopoda 
. 71 
Pelecypoda 
. 72 
Septibranchiata . . . 
. 72 
Eul amelli branchiata 
. 72 
Pseudol amellibran ch iata 
. 75 
Filibranchiata . . . . 
. 76 
Protobranchiata . . . 
. 77 
Amphineura 
. 77 
Aplacophora .... 
. 77 
Polyplacophora . . . 
. 78 
INTRODUCTION. 
The Recorders deem it advisable to remark that they have followed, 
almost in its entirety, the classification previously so successfully utilized 
by Mr B. B. Woodward. Their only deviation has been that in the 
Helicidce , the groups have been suppressed, as they are of opinion that by 
the adoption of this course, simplification of, and easier reference to, 
the Record will result. Further they have felt that a more liberal course 
in giving the full titles of Palaeontological papers would be of much assist- 
ance to students, who frequently desire to ascertain what work has been 
done by a particular author ; this mainly accounts for the apparent increase 
in the number of papers written during the past year. New Fossil genera 
