LIST OF ILLUSTRATIONS xi 
PLATE 
XXVII, Feepinc TRACKS OF SNAIL AND SLUG. 
XXVIII. Lirz-History oF THE CorAL-INHABITING MaGILUS. 
EXAMPLE OF A Fisrous ForM oF OvutTER COVERING, 
OR PERIOSTRACUM, AND OF A Mo.iousc (Xeno- 
phova) THAT BUILDS INTO ITS SHELL FRAGMENTS 
OF OTHER SHELLS, CORALS, AND STONES. 
XXIX. Typrcat MoLtiuscan Embryos. 
DIAGRAMMATIC SKETCHES OF THE STRUCTURE OF 
Mo.iuscan EYEs, ETC. 
XXX. Eaos anp EaG-CaPsoLEs, ETC., OF SOME GASTROPODS, 
SEcTIonNsS OF SOME THICK BIVALVE SHELLS. 
VARIATIONS OF THE Foot IN BIvALVE MOoLtusca. 
XXXI. Common GARDEN SNAIL CRAWLING, AND SHOWING 
THE MOTION OF THE Foor. 
XXXII. Eccentric Forms of GasTROPOD SHELLS, AND 
EXAMPLES OF THE EXTERNAL RESEMBLANCE 
BETWEEN SHELLS OF WIDELY DIFFERENT Forms 
oF Mottosca. 
Map, 
All the Plates (except Plate I., frontispiece) and the Map ave at the 
end of the book. 
