A New Albinistic Crayfish of the Genus Cambarus from Southern Missouri with a Key to the Albinistic Species of the Genus (Decapoda, Astacidae)

Of the previously known albinistic species of the genus Cambarus (C. ayersii, C. setosus, C. hamulatus, C. cryptodytes, and C. cahni) two are inhabitants of the Missouri Ozarks, and have been reported from several caves in the southwestern part of the state. While considerable confusion as to the status of C. ayers.ii and C. setosus still obtains, it is clear that the new species described below, although having affinities with them, is markedly distinct. The specimens on which this description is based were collected by Mr. Leslie Hubricht on July 4, 1941, and have been in my collection since early in 1942. Several efforts to obtain additional specimens have failed.