5 4 3 2 1 76 77 78 79 19 20 18 14 15 17 4 1 2 8 9 7 5 6 10 13 12 11 16 80 81 82 86 87 83 84 60 63 50 61 62 69 64 66 65 1 2 9 5 6 24 26 22 17 32 53 40 41 42 31 30 39 52 28 14 29 13 10 11 12 4 8 16 15 33 47 27 51 63 57 54 45 46 34 58 67 55 18 21 3 19 20 A B right parietal right cerebral left cerebral visceral left parietal right pallial intestinal anal left pallial left pleural left pedal right pedal right pleural

Figure 8.6 Circumesophageal Ganglia (dorsal views). A. The snail brain consists of nine ganglia surrounding the gut. You will record from the visceral and right parietal ganglia. B. Some cells of the visceral and parietal ganglia of Helix, as numbered by Kerkut et al. (1975).

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