PAGE 



PHYSA GYRINA, EGG MASS OF - 36 



PLEUROCERA ELEVATUM, SHELL OF 15 



PLEUROTOMA BABYLONIA 118 



POLYGYRA TRIDENTATA, EADULA OF 41 



PTEROPOD, A COMMON, OR SEA BUTTERFLY, Hyalcea trispinosa - 124 



PUPA SHELL, APERTURE OF 29 



PURPLE SHELL, A, Purpura lapillus 113 



EADULA, DIAGRAM OF THE TEETH ON THE MOLLUSCAN 42 



EADULA OF A LAND SNAIL, SECTION OF 42 



EADULA OF POLYGYRA TRIDENTATA 41 



ElSSOA COSTATA, YOUNG OF 93 



EAZOR SHELL, Ensis dircctus 79 



EAZOR SHELL WITH FOOT AND SIPHONS EXTENDED, _Vs-/.s- directus 67 



SHANKH OF THE HINDOOS, Tut'lindla pi/nun 120 



SLUG, A SEA, OR NUDIBRANCH, Dc/nl/rmoti/s arborescens 123 



SLUG OR SNAIL WITHOUT AN EXTERNAL SHELL, Limaxflaru* 51 



SNAIL, A BRAZILIAN, P>ulimus oblong us 47 



SNAIL, A CARNIVOROUS LAND, Circinaria concava 37 



SNAIL, A COMMON EUROPEAN LAND, Vitrca cdlaria 46 



SNAIL, A COMMON LAND, Gastrodonta ligera 37 



SNAIL, A COMMON LAND, Polyyyra pallia ta 25 



SNAIL, A CRAWLING POND, Limiuca migUelsi 35 



SNAIL, A MARINE, Melongena corona - 122 



SNAIL, A MINUTE LAND, Pupa 29 



SNAIL, A SMALL POND, Limncca dcsidiosa 1 1 



SNAIL, ANIMAL OF A POND, Limncca rnighelsi 12 



SNAIL, APPLE, SHELL AND OPERCULUM OF THE, Campeloma decistn/i 15 



SNAIL, APPLE, VIEWED FROM ABOVE AND IN FRONT, Vivipara intertexta 17 



SNAIL, DIAGRAM OF THE ANIMAL OF A LAND 40 



SNAIL, DIAGRAM OF THE BUCCAL ORGANS OF A LAND 39 



SNAIL, FOOT, MANTLE AND TENTACLES OF A POND 36 



SNAIL, FRESH-WATER, A MINUTE, Pomatiopsis lapidaria 23 



SNAIL, MOUTH PARTS OF A POND, Limna-a rr/lr.ra 45 



SNAIL OR SLUG WITHOUT AN EXTERNAL SHELL, Limax jlavus 51 



SNAIL, ORB, Planorbis 13 



SNAIL, PARTS OF THE SHELL OF A POND 11 



SNAIL, SECTION OF THE EADULA OF A LAND 42 



SNAIL, TADPOLE, ANIMAL OF, Physa, gyi'inn 36 



SNAIL, TEETH AND JAW OF A LAND, Polygyra pennsylvanica 41 



SNAIL, TEETH OF A POND, Limnrca capcrt<< 43 



SNAIL, THE FOREST HOME OF THE 50 

 SNAIL, THE SOLITARY, Pyramidula solitaria 



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