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Across 3. "Phorons" all marine, worm-like, U-shaped gut 7. Phylum Echinodermata, "Sea Cucumbers", greatly prolonged, 5 rows of tube feet, deposit feeders, internal madroporite 11. Phylum Echinodermata, "Starfish", oral surface faces down, 16. Subphylum Uniramia, segmented, uniramous appendages, terrestial and cryptics 19. "Arrow Worms", planktonic, active predators, hermaphroditic 22. Phylum Chordata, Subphylum Urochordata, "Sea Squirts", sessile, colonial marine 23. Phylum Arthropoda, Subphylum Crustacea, Class Malacostraca, mostly marine, well developed abdomen, 8 segments 24. Phylum Hemichordata, primative, worm-like, live in deep water in Sounthern Hemisphere

Down 1. Phylum Arthropoda, Subphylum Crustacea, "Krill", marine, filter feeders, highest number in Anartica 2. Phylum Echinodermata, "Sea Urchins", globular shapes, fused ossicles, spines for defense 3. "Peanut Worms", all benthic marine, detritous feeders, no gass echange or circulatory system,similar to Annelids 4. "Spiny-Skinned", 3 compartment coelom, pentamerous radial symmetry, internal skeleton, water vascular system 5. Phylum Bryozoa, non-polymorphic, all freshwater, U-shaped lophophore, gelatinous colony, most primative 6. Phylum Arthropoda, Subphylum Uniramia, "Millipedes", posses diplosegments and repugnantoral glands for defense 8. Phylum Hemichordata, "Acorn Worms", live in mud flats and are deposit feeders 9. Phylum Bryozoa, all marine species, circular lophophore, polymorhpic, chitonious zooecium 10. "Lamp Shells", all marine, ancient group with 2 compartmental coelom 12. Phylum Brachiopoda, incomplete digestive tract, CaCO3 shell, Terebratella 13. Phylum Echinodermata, "Brittle Stars", most diverse, smaller than starfish, no ambulacral groove, bursal sacs 14. Phylum Brachiopoda, valves held by muscles, complete digestive tract, CaPO4 shells, Lingula 15. "Velvet Worms", very ancient group, living fossils, mostly tropical areas, internal segmentation 17. Phylum Arthropoda, Subphylum Uniramia, "Centipedes", active predators, scretes poison with maxillpedes 18. Phylum Echinodermata, "Sea Lilies", oldest, most primative group, sessile and deep water, ossicles form stalk 20. "Moss Animals", Colonial, sessiles, mostly marine, polymorphic zooids in colony, no circulatory, no excretory, no respiratory 21. Phylum Arthropoda, Subphylum Uniramia, 750,000 species, spiracles for respiration, flight