BIOLOGY. 
Moll . 31 
11. Embryology. 
On the motions of the spermatogones and on spermatogenesis in Helix 
pomatia ; Lee (257). — Embryology of Crepidula ; Conklin (91). — The 
cell lineage of Planorbis ; Holmes (209). — On the structure and develop- 
ment of Molluscan ova, especially of Pleurophyllidia californica and 
Diaulula sandiegensis ; MacFarland (274). — Embryology of Yoldia lima- 
tida; Drew (128). — Oviposition of Nautilus macromphalus ; Willey (617). 
— Embryology and sexes of Unionidce ; Simpson (418). — Fertilization in 
gastropods ; Crampton, Science, v, pp. 320, 391. — Fertilization and 
maturation of eggs in Limax ; Byrnes, Science, v, p. 391. — Segmentation 
of egg in Tcthys fimbriata ; Viguier (489). — Spermatozoa in Paludina 
vivipara ; Auerbach (20). 
12. Prylogeny and Classification. 
The Mollusca of Tanganyika represent a contamination of the Lake by 
the sea; Moore (318). — Phylogeny of Chitons; Plate (373). — Classifica- 
tion and Phylogeny of the i Pleurotomariidce ; Burckhardt (65). 
Scrobicularia 
Tel\i 
Una 
Capsa 
Y 
Donax trunculus 
Donax polilus 
Macha — Psammobia 
Donax serra 
i 
Petricola 
i 
Tapes) 
Venus 
I 
Cytherea 
Cyprina 
| Veneridce 
Asaphis 
Cardita 
Astarte 
Ostreidce 
Limidce 
Dreissensia 
Primitive Astartidce 
Anomiidce 
i 
Mytilus A viculidce 
Modiola 
Pectinidce 
Rhombopteria 
— i i, i — 
Arcidce 
Nuculidce 
Nuculoid Group 
perhaps 
Nuculites and Prcearca 
Above classification formed on gills by Rice (390). 
13. Stray Notes. ' 
On the absorption of iron in Ostrea edulis ; Carazzi (70). — A new 
species of parasitic Gastropod within the body-cavity of an Echinoderm 
(Ckirodota) ; Ludwig (272). — Physiological experiments upon Bivalves in 
various solutions ; Pieri (353). — On the etymology of the word Purple ; 
Dedekind Achatina crawfordi appears to bo viviparous; Clapp, 
Nautilus, xi, p. 69. — A reversion of a colour variation in Avion empiri- 
corum ; Collinge (86). — Parasitic mollusca ; Kukenthal (256). — Biological 
notes on Dreissensia polymorpha ; Frenzel (149, 150). — Loligo changes 
colour when resting; Verrill (482). — Note on parasite of Lamellibran- 
chiata ; Giard, C.R. Soc. Biol, iv, p. 956; also Leger, t. c. pp. 957, 987. — 
1897. [Vol. xxxiv.] c 13 
