ANATOMY, ETC.,- 
GEOGRAPHICAL DISTRIBUTION. Moll. 43 
Mite parasitic on Testacella scutalum ; Quilter (1). 
Boring of shells of Ostrea and Mytilm by Sponges ( Clione stationis ); 
Nassonoff. 
The cells of the mantle-margin of Tridacna are full of symbiotic Algce ; 
Brock (2). 
Variation of Limncea peregra possibly dependent upon environment ; 
Madison. 
Variation, with special reference to nomenclature of varieties ; Taylor 
( 1 ). 
13. Abnormalities. 
Triopa clavigera with branched rhinophore; Fischer (2). 
Haliotis shell with two rows of perforations ; Smith (2). 
Form with depressed apex, channelled suture, and pyriform aperture of 
Bythinia tentaculata ; id. (7). 
Monstrous form (scalar) of Helix lapicula\ Milnes. 
Sinistral Helix nemoralis ; Fenn. 
Abnormal Anodonta cygnea ; Roberts (4). 
Collecting and Preserving. 
Instructions for collecting ; Sterki (1, 3), Prete, Michael, Williams, 
J. W. (1). 
Suggestions for collective investigation in the JJnionidce ; Kobelt (9). 
Keeping shells in tubes ; Layard (1), Pidgeon, D. 
GEOGRAPHICAL DISTRIBUTION. 
Land and Fresh-water Mollusca. 
The present distribution of the operculate land-shells is fully dis- 
cussed, with reference to palaeontology and to geographical considerations; 
Kobelt (6). 
Distribution of Pulmonata in general discussed ; Simrotii (6). 
I. — PALtEARCTIC zone. 
1 . Septentrional Region. 
Greenland. Holm. 
British Isles. 
Clausilia pumila , Zgl., new to England ; Woodward. Distribution of 
Testacella scutulum ; Taylor (5). See also Williams, J. W. (2, 7), and 
further notes in “ Science Gossip,” by Cockerell ; Roberts ; Tomlin ;• 
Wild man. 
List of 183 titles of papers, some of which have escaped entry in the 
Zool. Rec. ; Roebuck & Clarke. 
