1887] Zoology. 83 
poda, the following changes in the eyes, optic ganglia, and optic 
nerves occur in forms living in total darkness: (1) Total atrophy 
of the optic ganglia and optic nerves, with or without the er- 
Persistence of the optic lobes and optic nerves, but total atrophy 
of the rods and cones, retina and facets (Orconectes pellucidus 
kansas, commencing with Carroll and extending from there along 
the western line of the State, Benton and Washington being north 
of the mountains, Crawford south of them but on the north side 
of the Arkansas River, and Sebastian on the south side of it. 
Hot Springs is in Garland County, Hot Springs County south 
of it, and Jackson County north of Little Rock, on the Iron 
Mountain Railroad. The following list gives the result of a large 
amount of searching, though the total time given to it in Carroll 
. 
County was many times that in any of the other counties. 
