[1921] 
VIII. Mollusca. 
Moll. 27 
Evolution. — A iraghi, 5 ; Cooke, 
120 ; Margier, 287 ; Plate, 356 ; 
Robson, 377. 
Variation in Form. — C ousin, 124 ; 
Margier, 287 ; Neaverson, 309 ; 
Piaget, 346 ; Rollier, 381. 
Variation in Colour. — S chuh, 400; 
Shimek, 406. 
DISTRIBUTION. 
(a) Recent. 
(a) Marine. 
Arctic Ocean. — A werinzew, 20 ; 
Dall, 130 & 133. 
North Atlantic Ocean, Caribbean Sea 
and Gulf of Mexico. — Bardarson, 30; 
Bartsch, 33 ; Bell, 45 & 46 ; Butter- 
field, 85 ; Chadwick, 97 ; Christen- 
sen, 101 ; Fuller, 182 ; Gilson, 190 ; 
Grimpe, 203 ; Herdman, 224 ; Hop- 
wood, 230 ; Jacot, 245 ; Lameere, 
267 ; Lamy, 269 ; Morse, 306 ; 
Nylander, 314 ; Odhner, 317 ; 
Ritchie, 373 & 374 ; Schermer, 390 ; 
Scott,* 402 ; Thompson, 440 ; Tomlin, 
445 ; Waddington, 468 ; Winck- 
worth, 493, 495 & 496. 
Mediterranean Sea and Black Sea. — 
[Anon.] 17 ; Kalkschmid, 253. 
South Atlantic Ocean. — B avay, 43 ; 
Dall, 129 ; Dautzenberg, 139 ; Lamy, 
271. 
Indian Ocean, Red Sea. — A shby* 19 ; 
de Boury, 70; Dautzenberg, 140; 
Gatliff & Gabriel, 187 ; Gruvel, 
205 ; Hedley, 218 ; Lamy, 270 ; 
Robson, 378 ; Shirley, 409 ; Sower- 
by, 413 ; Tomlin, 441, 442, 443 & 447. 
Malaysia. — G rimpe, 202 ; Hedley, 
218. 
Pacific Ocean. — A shby, 18; Bartsch, 
33, 34 & 40 ; Berry, 50 ; Dall, 130 & 
133 ; Essenberg, 167 ; Hanna, 212 ; 
Hedley, 218 ; Kofoid, 260 ; Lamy, 
269 ; Mestayer, 299 ; O’Donoghue, 
319; Oldroyd, 325 & 327; Orcutt, 
330 ; Powell, 360 ; Shirley, 409 ; 
Strong, 432 ; Thaanum, 439. 
Southern Ocean. — B erry, 49. 
(0) Non-Marine. 
Scandinavia. — G eyer, 189 ; Odhner, 
318 & 318a. 
Germany. — B orner, 68 ; Herbst, 
223; Wagner, 470. 
British Islands. — Alkins, 7 ; Bacc- 
hus, 22, 23 & 24 ; Beeston, 44 ; 
Boycott, 73 ; Byne, 86 ; Horsley, 
231 ; Huggins, 233 & 234 ; Hurst, 
236 ; Jackson, 244 ; Jennings, 248 ; 
Kendall, 256 ; Lawson, 277 ; Mase- 
field, 291 ; Oldham, 320, 321, 322, 
323 & 324 ; Pilsbry, 354 ; Roebuck, 
380 ; Saunders, 388 ; Stelfox, 427 ; 
Taylor, 436 & 438; Winckworth, 
494 & 497 ; Woodruffe-Peacock, 500 ; 
Woodward, 501. 
France. — [A non.], 16 ; Barbiche & 
Kieffer, 28 ; Cabanes, 87 ; Cardot, 
89 & 90 ; Cardot in Mailfait, 93 ; 
Margier, 287. 
Spain. — B ofill & Haas, 60 & 61. 
Switzerland. — B orner, 68 ; Huber, 
232a ; Piaget, 346, 348, 348a & 348b. 
Hungary. — W agner, 469 & 470. 
Jugo-Slavia. — S turany in Ginz- 
berger, 191 ; Sturany & Wagner, 
434 ; Wagner, 469, 470 & 471 ; 
Wagner & Penther, 472. 
Balkan Peninsula. — P etrbok, 344b ; 
Sturany & Wagner, 434 ; Wagner, 
470 ; Wagner & Penther, 472. 
Russia. — D ybowski & Ghochma- 
licki, 161 ; Frankenberger, 178a. 
Mesopotamia. — Prashad, 361. 
British India, etc. — A nnandale, 12, 
13 & 14 ; Annandale & Prashad, 15 ; 
Gude, 206 ; Pilsbry, 354 ; Prashad, 
362, 363 & 364. 
Eastern Siberia. — D ybowski & 
Grochmalicki, 161. 
Malaysia, Philippine Islands, etc. — 
Annandale, 11 ; Bartsch, 35, 36, 37, 
38 & 39 ; Fulton, 184 ; Simroth, 411. 
N. Africa. — M argier, 287 ; Nicolle 
& Gobert, 311 ; Sturany, 433. 
W. Africa. — B oettger, 58 ; Daut- 
zenberg, 139. 
E. and C. Africa, etc. — C ockerell, 
111. 
Canada. — Latchford, 274. 
United States as a whole. — G ood- 
rich, 193. 
