| PAGE | | Canon Horsley in his study examining a rare variety of whelk (var. Babylonica) from a stall in the Walworth Road. | Frontispiece. | | H. pomatia, half natural size | 11 | | Dextral H. aspersa and H. pomatia | 13 | | Love-darts of H. pomatia, much magnified | 15 | | H. nemoralis at rest on hawthorn | 17 | | Names of parts of shell and of body. Unio, LimnÆa, Vivipara, and Arion | 22 | | Body of snail and of slug | 23 | | Three specimens of Arion ater, showing tentacles, breathing orifice, and slime gland | 31 | | Testacella haliotidea | 35 | | Helicella virgata at rest on thistle, natural size | 45 | | Some of our smaller shells | 47 | | Paludina contecta (two) and LimnÆa stagnalis on water-weeds | 57 | | Neritina and Ancylus | 59 | | Freshwater mussel breathing and eating | 61 |
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