OKTMANN: THE CRAWFISHES OF THE STATE OF PENNSYLVANIA 519 



Fig. 2. Cambarus hartoni roiitiilu.s ((j'inu-d). Kostruni. -*. 



2(1. Female, 89 mm. long. Collected by the writer Oct. 4, 1904, in Tiinplc Creek, Albion, 



Erie County. Catalogue number 74.4.35. Normal sliape. 

 'Ih. Young female, 18 mm. long. Collected by Miss G. Kinzer, Aug. 27, 190.5, in Sixteen- 

 Mile Creek, Northeast, Erie County. Catalogue number 74.6.30. Nurmal shape in 

 young specimens. 

 Fio. .3. Cnmharus mrolinus Ericiison, iiostrum. J. 



3«. Male, first form, 60 mm. long. Collected ijy the writer, Sept. o, 190."), at Oiiiopyie, 



Fayette County. Catalogue number 74.640. Normal sliape. 

 'ib. Male, second Ibrm, 30 mm. long. Collected by the writer, .Jime 11, 1904, at Indian 

 Creek, Fayette County. Catalogue number 74.36.J. Shape exceptional. Most ex- 

 treme case as regards convergence of margins. 

 Fifi. 4. Cambdrns mono)if/alcusiti Ortman. Kostruni. ^. 



4«. Male, first form, 6.3.5 nun. long. (Type.) Collected by the writer. May 21, 190.5, at 



Fdgewood Park, Allegheny County. Catalogue number 74. .316. Normal shape. 

 46. Female, 73 mm. long. Collected by the writer, Oct. 12, 1904, at Hill, Westmorelan<l 

 County. Catalogue luunlier, 74.449. Shape unusually broad, and margins almost 

 parallel. Most extreme case in this direction, standing rather isolated. 

 Fig. 5. Cambanis limosus (Rafines(\ue). Left first pleopod of male, first form. |. 



0(1. Inner view. Collected by the writer, Sept. 19, 1904, in Marcus Hook Creek, Mar- 

 cus Hook, Delaware County. Catalogue number 74. 12.3. 

 i)b. Posterior view of same. 

 Fig. 6. Ccmburn.^ prop!)iq>niK Girard. Left first pleopod of male. \. 



6. Inner view, male, first form. Collected iiy the writer, Oct. 4, 1904, in Tiinple Creek, 



Albion, Erie County. Catalogue number 74.^.39. 

 ()/>. Inner view, male, second form. Collected i)y the writer, .lune 7, 1904, in a tributary 

 of Conneaut Creek, Conneautville Station, Crawford County. Catalogue numin'r 

 74.336. 

 Fig. 7. ( 'dmbdrn.'! obscnnts lliv^vu. Left first pleopod of male. *]. 



7(1. Inner view, male, first fi)rm. Collected by the writer, Aug. 24, I9gI, in the Ohio 



River, Aml)ridge, Beaver Comity. Catalogue number 74.401 . 

 7/;. Posterior view of same (horny tip of outer part hidden behind inner iKirt). 

 7c. Inner view, male, second form. Collected by the writer, .Inue 24, 1901, in ilit- I^iyal- 



lianna River, Cris]), Westmoreland County. Catalogue mnnluT 74. .352. 

 1(1. Inner view, hermaphroditic specimen (type of male, first form). Collected by Atkin- 

 son, Graf, and Williamson, May H, 1S99, in the Ohio River, Neville Island, Alle- 

 gheny County. Catalogue number 7.436. (See text, p. 376.) 

 7e. Posterior view of same. 



