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Across 4. a class of mollusk with 8 or more arms 9. another name for "losing your guts", especially in sea cucumbers 10. squids have two attached at the gills, one that supplies the rest of the body 11. another name for the large digestive "tomali" in some crustaceans 12. the class of echinoderms that includes sea stars 14. the shell-like endoskeleton of sea urchins 15. the name for a skeleton found on the inside of organism 17. the name of the first type of crab larvae 18. the name of the second type of crab larvae 19. the name of the shell that covers the cephalothorax 20. when a sea star or arthropod replaces a lost appendage 24. the large claw-bearing appendages of crustaceans 26. the class of echinderms that includes sand dollars and sea urchins 28. the class name for sea cucumbers 30. the five large teeth found in sea urchins 31. in mollusks, a tongue with teeth 32. animals in this subphylum have two pairs of antennae, compound eyes and gills. 33. the appendages that make up the mouth of a crustacean 34. agile, scrawny sea stars in the class ophiuroidea

Down 1. the dozens of suction-cups that allow echinoderms to crawl 2. the description of the cnidarian life cycle which changes from medusa to polyp 3. the "teeth" in the stomach of a crustacean 5. the name of the sponge and cnidarian larvae 6. these structures cut through the body walls of some echinoderms allowing them to respire 7. the groove in which tubefeet of echinoderms are found 8. the main body region of a crustacean 13. squids have eight arms and two of these longer appendages 16. a class of mollusk with animals that have a muscular foot and, in many cases, a spiral shell 21. the phylum of invertebrates that includes sea stars, urchins and sand dollars 22. the animals in this mollusk class have two shells. 23. animals in this phylum have jointed appendages and a chitinous exoskeleton. 25. the bell-shaped stage of a cnidarian 27. what crustaceans must do to grow a new exoskeleton 29. in crustaceans, these are attached to the legs and are found under the carapace.