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 larvae of 
Opistliobranchs ; Mazzarelli (431). — Torsion in the Opisthobranchs 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 Planorbis 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 Mytilus ; Rice (525).— Morphology and 
genesis of the egg-integument in Cephalopoda and Chitons ; Schweikart 
(550, 551). — Embryology of Haminea solitaxia ; 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 and Dentalium; 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 
corneum ; 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 PaZudestrina taylori ; 
Jackson & Taylor (326). — Ancylus adhering to waterbeetles ; Johnson 
(335). — Note on mode of distribution of Helix ; MadoulE (406). — Accli- 
matization of some marine sholls ; Pelseneer (474). — On self-mutilation ; 
Reeker (517). — Self-mutilation in Mollusca; Riggenbach (528). — Notes 
on Gambier pearl-oyster ; Seurat (554, &c.). — Epiphragmsof Thaumastus ; 
Smith (572).— Ethology of Helices; Stahl (591).— Habits, etc., of Dreis- 
sensia\ Standen (592). — Longevity of Bulimulus pallidiov, Stearns, 
Nautilus xviii, p. 58. — Acclimatization of pearl-oyster; Vassel (624). — 
Locomotion of Nucida-, VLks (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). 
j 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 hortensis ; Collinge (127). 
On the assumption of a rounded form in laterally attached Bivalves ; 
Anthony (21).— Spire variation \\\ Pyramidula alternata ; Baker (31). — 
Monstrosities of Helix pomatia ; Bellevoye (49).— Variation of Achati- 
