INQUIRIES RELATIVE TO CRAWFISH. 5 



18. How soon after laying do the young ones hatch out ? 



19. How many times do they change their shell before leaving the 



mother ? 



20. How many times do they change within the year after leaving 



the mother ? 



21. Do they split the shell lengthwise, or how, in making the 



change ? 



22. Does the change so exhaust their energies as to cause them to 



remain inert ? 



23. If so, for how long a time ? 



24. Do they unite sexually at all times of the spring, summer, or 



autumn ? 



25. Do they ever so unite in winter ? 



26. Are they affected in any way at the times of changing of the 



moon ? 



27. Do the males fight among themselves for the possession of the 



female ? 



28. Does any species live in the wells of your region ? 



29. If so, in what kind of water ? 



30. Does the cold or darkness of such places deform them in any 



way ? 



31. How deep in the well do they live, and in what parts of it ? 



32. Do you find them in the standing water of limestone quarries ? 



33. Do they live in the pools of other kinds of quarries ? 



34. Are they found anywhere in strong limestone, iron, sulphur, or 



alkaline waters ? 



35. Does the sand or grit carried down by freshets kill or disable 



them ? 



36. Are they more numerous in some places now than they were 



formerly ? 



