INTRODUCTION. 
Moll. 3 
to British Molluscs we may refer to Marshall’s (330) additional notes, 
mainly on known forms, and an interesting little contribution from Farran 
(175), dealing with Nudibranchs. The South African fauna has received 
a number of additions through the useful critical list given by Smith (482), 
while Sowerby (492) has described some new forms, a number being from 
fairly deep water. Melvill (348) has, separately and with Standen (351, 
352), added to our knowledge of the Molluscs inhabiting the region of the 
Persian Gulf. The Australian fauna has received attention from Hedley 
(223), while Gatliff (195), both separately and with Pritchard (430-432) 
has continued his work on the Victorian Molluscs. A considerable amount 
of information of interest to students of the American fauna will be found 
in the paper by Arnold (18) reviewing the Pleistocene and Pliocene fauna of 
California. Eliot (166) has added to our knowledge of theNudibranchiate 
Molluscs of Eastern Africa. 
The first part of Herdman’s (231) ‘Pearl Oyster Report’ leads one to 
notice a considerable number of minor scattered papers and notes dealing 
with pearls, their origin, and occurrence. 
Specific variation has proved attractive to several authors and we may 
name Davenport (139) on Pecten , Baker (23) on rib-variation in Cardium , 
and Bigelow & Rathbun (41) on Littorina. The nepionic stage of the 
shell has been studied by Kestevf.n (283), amongst others. 
Dall (133, 135) has dealt with the classification of the Astartidce and 
Cyrenacea and Douvill^ (150) with Radiolites. 
Turning to the more strictly anatomical papers, we have first to note 
the valuable paper by Ridewood (443) on the Pelecypod gill. He has given 
a detailed account of its structure in many forms and proposes to remodel 
the classification now most commonly in use, namely that of Pelseneer; in 
which connection a paper by that authority himself (392) should be studied. 
Sassi (456) has dealt with the anatomy of Anomia ; Bloomer (52-56) with 
some Solenidce ; while Burne (75) has written a note on the renal organs 
of Nucula. The anatomy of Cryptoplax has been described by Wettstein 
(557). A detailed accotint of Patella has been published by Davis & 
Fleure (140). Amongst papers relating to the Gastropods we may specially 
notice that on the development of Trochus by Robert (444), as also 
Schnabel’s (465) account of the development of the radula, and the work 
by Thiele (527) describing a number of marine forms from the German 
deep-sea expedition. Ancel (8, 9) and Bruyne (70) have also worked on 
the structure of the genitalia, and Ram an an (436) has given an interesting 
account of the habits of Ampullaria. The literature on Cephalopods has 
been fairly prolific and we may note Bergmann’s (37, 38) works relating to 
the sexual organs, several papers by Chun (91-93), and Hamlyn-Harris’ 
(221) account of the statocysts. 
I s ! o salient change has been made in the Record this year, and, in con- 
clusion, it is only desired to renew the appeal, made last year, for copies of 
papers with the original pagination indicated. 
CORRIGENDA IN ZOOLOGICAL RECORD FOR 1902 , Vol. xxxix. 
p. 43, line 1. For Quadrula resupinatum read Q. salafrutium. 
p. 45, line 3. For Tornatellina hopkinsi read T. biolleyi. 
p. 50. Transfer entry in No. 18 of Bahamas to No. 17, Caribbean 
Province. 
p. 50. Transfer entry in No. 18 of Washington and Oregon to No. 12, 
Californian Province, on p. 49. 
