3218. Mollusca. 20 Color Photomicrographs. 1. Chiton, marine mollusc, t.s. 2. Snail, t.s. through body of small specimen 3. Snail, l.s. through head 4. Alloteuthis, cuttlefish, young specimen w.m 5. Alloteuthis, horizontal sec. young specimen 6. Alloteut