High resolution image of vesicles and early endosomes under the membranelles of the peniculus of the buccal cavity. Cilia and basal bodies are tangentially fractured in this quick-freeze deep-etch preparation. Preendosomal vesicles, clathrin-coated and partially uncoated, that arise from the clathrin-coated ends of parasomal sacs lie nearest the basal body/cilium complexes. Internal to these are the many early endosomes to which the uncoated preendosomal vesicles fuse and from which smaller clathrin-coated vesicles bud off. Blebs protrude from one early endosome. Carrier vesicles of about 100nm in diameter are found internal to the early endosomes. TEM taken on 7/19/88 by C. Schroeder with Zeiss 10A operating at 80kV. Neg. 12,000X. Adapted with permission from J. Cell Sci. The raw film was scanned with an Epson Perfection V750 Pro. This image is best used for quantitative analysis. Additional information available at (http://www5.pbrc.hawaii.edu/allen/).