... . 17 Housefly Compound Eye,w.m. 67 Spirllum,smear. 18 Honeybee Compound Eye,w.m. 68 Rhizopus,w.m. 19 Dragonfly Compound Eye,w ... .m. 69 Penicillium,w.m. 20 Dog Esophahus,c.s ... Cardiac Region,sec. 67 Pine Pollen,w.m. 18 Dog Stomach Pyloric Region,sec. 68 Plasmodesmata,sec. 19 Pig Liver,sec. 69 ...