OUTLINE OF PLANT AND ANIMAL ASSOCIATIONS 307 



35. The tall shrub association Epcira association 



36. The low shrub association Wood nymph association 



37. The ground association Snail association 



This in turn may be subdivided into 



38. Litter association Thousand leg association 



39. Rotting log association Horned Passalus association 



40. Fungus association Fungus beetle association 



41. Subterranean association Cicada nymph association 



ASSOCIATIONS CHANGING SUCCESSIVELY AS LAND DESTRUCTION 



OCCURS 



42. The shore clay bluff association Cicindela limbalis association 



43. River bluff association Kingfisher association 



44. Clay ravine association Spearhead dragon-fly association 



45. Rock ravine association Phoebe association 



46. The rock hill association 



THE RIVER ASSOCIATIONS 

 Communities of the Intermittent Streams 



47. Intermittent rapids association Black fly association 



48. Intermittent pool association Cambarus association 



49. Permanent pool association Horned dace association 



Communities of Permanent Streams 



50. a) The spring-fed brook water cress Planarian association 



association 

 b) The usual alkaline streams associations as follows: 



51. The very rapid water (lotic) society Hydropsyche association 



This is subdivided into 



52. The brook rapids or Rainbow darter association 



53. The creek rapids or Fantail darter association 



54. The river rapids or Banded darter association 



55. The moderately rapid, sandy bottom Campeloma association 

 association 



Which may be divided as above 



56. The sluggish water (Limnetic) sur- Daphnia-Cypris association 

 face society 



57. The sluggish water (Limnetic) bot- The clam association 

 torn society 



58. The estuary association subdivided much as is the pond society 



59. (c) The acid stream association 



