OBSERVATIONS ON THE ASTACIDJi— FAXON. 655 



from tbe following localities (Professor S. E. Meek's collection): Cedar 

 lliver, Cedar Kapids, Linn County, Iowa; Mapleton Kiver, Mapleton, 

 Monona County, Iowa; Boyer River, Arion, Crawford County, Iowa; 

 Belmond, Wright County, Iowa; Blue River, Crete, Saline Couuty, 

 Nebraska. 



CAMBARUS IMMUNIS SPINIROSTRIS Faxon. 



W. P. Hay reports this form as found in Terre Haute, Indiana. 

 The type locality is Obion County, Tennessee. It has also been 

 recorded by me from Shawnee County, Kansas. 



CAMBARUS PALMERI Faxon. 



St. Francis River, at Green way and Big Bay, Arkansas; Black 

 River, at Black Rock, Arkansas; Paragould, Green County, Arkansas 

 (Coll. S. E.'Meek). 



The type specimens of C. palmeri are small individuals of the second 

 form of the male and females collected in Obion County, Tennessee. 

 In the collection of Professor S. E. Meek are a good many examples from 

 the above-named localities in northeastern Arkansas which agree 

 essentially with the Tennessee specimens, differing from them merely 

 in the outline of tbe rostrum, which is somewhat longer and narrower, 

 with more convergent sides. The first abdominal ap])eudages of the 

 first form of the male are strongly recurved, as in C. iminunis, but the 

 rami are much longer than in that species. The largest specimens 

 attain to a length of 80 mm. The dactylus of the large cheli})ed in 

 adult individuals varies in length from one and a third to a little over 

 twice the length of the inner border of palm. The upper surface of the 

 claw is ornamented with scattered, roundish, dark spots. In C. pal- 

 meri there is no very evident spine on the lower face of the carpus 

 between the median spine and the spine on the internal border. 



CAMBARUS PALMERI LONGIMANUS, new subspecies. 

 (Pliite LXIV, figs. 1-6.) 



Similar to G. iHilmeri, but different in the shape of the hand, the 

 body of which (or palm) is thinner (less inflated) and the fingers much 

 longer proportionally. The antenna', too, are longer, and the rostrum 

 as a rule is more deeply excavated. 



Dimensions of the chela of a male. Form I, 83 mm. long: Length 

 from point of articulation with carpus to end of dactylus 44 mm.; inner 

 margin of pahn 10 mm.; dactylus 35 mm. 



Good Land, Indian Territory; Walnut Creek, Kainister, Indian Ter- 

 ritory; Arthur, Texas (Coll. Mus. Comp. Zool., from S. E. Meek). 



Many specimens, including both forms of the male, together with 

 females, from each of the above lo(;alities. The upper surface of tlie 

 carpus and hand is spotted with dusky; the tips of the fingers are red, 

 preceded by a transverse band of dark color which runs along the 

 whole outer margin of the hand. 



