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Across 3. the five large teeth found in sea urchins 6. the name of the sponge and cnidarian larvae 9. animals in this phylum have jointed appendages and a chitinous exoskeleton. 10. the shell-like endoskeleton of sea urchins 11. another name for the large digestive "tomali" in some crustaceans 13. the large claw-bearing appendages of crustaceans 15. the phylum of invertebrates that includes sea stars, urchins and sand dollars 16. the name of the second type of crab larvae 17. the groove in which tubefeet of echinoderms are found 21. squids have eight arms and two of these longer appendages 22. the name for a skeleton found on the inside of organism 24. the bell-shaped stage of a cnidarian 26. the class name for sea cucumbers 27. a class of mollusk with animals that have a muscular foot and, in many cases, a spiral shell 28. the "teeth" in the stomach of a crustacean 29. animals in this subphylum have two pairs of antennae, compound eyes and gills. 30. the name of the first type of crab larvae 31. the class of echinderms that includes sand dollars and sea urchins 32. in crustaceans, these are attached to the legs and are found under the carapace. 33. the class of echinoderms that includes sea stars 34. another name for "losing your guts", especially in sea cucumbers

Down 1. the description of the cnidarian life cycle which changes from medusa to polyp 2. these structures cut through the body walls of some echinoderms allowing them to respire 4. in mollusks, a tongue with teeth 5. the dozens of suction-cups that allow echinoderms to crawl 7. the main body region of a crustacean 8. the name of the shell that covers the cephalothorax 12. the animals in this mollusk class have two shells. 14. a class of mollusk with 8 or more arms 18. when a sea star or arthropod replaces a lost appendage 19. squids have two attached at the gills, one that supplies the rest of the body 20. agile, scrawny sea stars in the class ophiuroidea 23. what crustaceans must do to grow a new exoskeleton 25. the appendages that make up the mouth of a crustacean