BIOLOGY. 
Moll 39 
KosTANECKi (372).— Evolution of the spermatozoids in Helix pomatia; 
Lee (391). — On the structure of the spermatozoids in Helix pomatia; 
Lee (392).— Artificial parthenogenesis in Molluscs; Loeb (399).— The 
primitive kidney in Mollusca; Mazzarelli (429).— The free larv» of 
Opisthobranchs ; Mazzarelli (431).— Torsion in the Opiathobranchs and 
the primitive coiling in Actceon-, Mazzarelli (430).— Amitosis in the 
embryo of Fasciolaria Osborn (461, 462). -On the development of the 
kidney, pericardium, and heart in Planorhis corneus; Potzsch (501). — 
Influence of temperature on the growth of freshwater shells ; Raj at (508). 
— The sperm of the Invertebrata, with reference to Mollusca; Retzius 
(521).— Development of gill in Mijtilus; Rice (525).— Morphology and 
genesis of the egg-integument in Cephalopoda and Chitons ; Schweikart 
(550, 551).~Embryology of Haminea solitaria ; Smallwood (570).— Spawn 
of Nudibranchs; Smallwood (569).— Maturation, fertilization, etc., of 
Haminea solitaria; Smallwood (570). — Oligopyrene and apyrene sperm 
in the Prosobranchs ; Stephan (596).— Spermatogenesis of the Cephalo- 
poda; Thesing (611).— Development of Patella a,nd I)e7italium ; Wilson 
(653). 
4. Ethology (Habits, Relation to Environment, &c.). 
Habits of Littorina rudis; Bohn (71, 72). — Note on Ethology of Litto- 
rina; Bohn, C.R. Ac. Sci. cxxxviii, p. 112. — Slime spinning by Sphcerium 
cornetim ; Carter, Naturalist 1904, p. 156. — Note on dispersal of Mollusca; 
Caziot (101).— Habits of Testacella haliotidea; Cooke (138). — Animal 
Ecology of Cold Spring Sand Spit; Davenport (178). — Life-history of 
Haliotis; Fleure (227).— The habits of Solenogastres ; Heath (286).— 
Habits of Physa gyrina; Hyning (320).— Habits of Paludestrina taylori; 
Jackson & Taylor (326). — A^icylus adhering to waterbeetles ; Johnson 
(335). — Note on mode of distribution of Helix; Madoulj^ (406). — Accli- 
matization of some marine shells ; Pelseneer (474). — On self-mutilation ; 
Reeker (517). — Self-mutilation in Mollusca; Riggenbach (528). — Notes 
on Gambier pearl-oyster ; Seurat (554, &c.). — Ei)iphragms of Thaumastus; 
Smith (572).— Ethology of Helices; Stahl (591). — Habits, etc., of Dreis- 
sensia; Standen (592). — Longevity of Bulimulus palUdior; Stearns, 
Nautilus xviii, p. 58. — Acclimatization of pearl-oyster; Vassel (624). — 
Locomotion of Nucula ; Vl^;s (635). 
Pearls and their formation : — On Pearls ; Anon (18). — The formation of 
pearls; Boutan (80). — General notes; Dubois (202). — On the secretion 
of pearls ; Dubois (205). — Note on pearls ; Dubois (204). — On the origin 
of pearls, and views of old authors ; Giard (253). — Recent investigations 
on pearl-formation ; Herdman (298). — Pearl formation in the Ceylon 
Pearl Oyster ; Herdman & Hornell (302).^ — On pearls, and their forma- 
tion ; McIntosh (404). 
Enteroxenos, apparently n. gen., parasitic in Holothurians ; Bonnevie 
(76). — New Nematode parasitic in Helix; Conte & Bonnet (137). — 
Trematode parasite of oyster ; Graham, Science xix, p. 247. — Parasites of 
pearl oyster; Shipley & Hornell (558). — Parasitic Molluscs; Tonniges 
(615). 
5. Variation and Teratology. 
Variation of colour in Nudibranchs; Abric (1). — Absence of male 
generative organs in Avion kortensis; Collinge (127). 
On the assumption of a rounded form in laterally attached Bivalves ; 
Anthony (21). — Spire variation in Pyramidida alternata; Baker (31). — 
Monstrosities of Helix pomatia; Bellevoye (49). — Variation of Achati- 
