EXPLANATION OF THE PLATES. 185 



PLATE IX. 



Firs/ abdominal appendage* <//' male. 



Fig. 1". Cambarus luiinulalits FAX. Form II." ... X 12 



" K The same. Form 11 ... X 12 



" 2". Cambarus Girardiaiius FAX. Form II. . . . . . . . . . . X 10 



" 2"'. The same. Form 11 X 10 



" 3. Cumbarus cormitus FAX. Form I X 6 



" y. The same. Form I X 



" 4. Cambarus medius FAX.* Form I X 



" 1'. The same. Form I X 6 



" 5. Cambarus forceps FAX. Form I. X 8 



" 5'. The same. Form I X 8 



" 5". The same. Form II X 8 



" 5'. The same. Form II X 8 



" fi. Cambarus Putnami FAX. Form I X 4J 



" 0'. The s:ime. Form I X 4 



" 0". The same. Form II X 8 



" 6'. The same. Form II X 8 



" 7. Cambarus spiuosus BUNDY ? Lauderdale Co., Ala. Form I X 6 



" ?'. The same. Form I X 6 



" 7". Cambarus spinosus BUXDY. Etowah River, Ga. Form II . X 4 



" 7 a '. The same. Form II X 4 



" 8. Cambarus rusticus GIR. Yellow Springs, Ohio. Form I X 6 



" 8'. The same. Form I X 6 



" S". Tlie same. Form II X 6 



" 8"'. The same. Form II . X 6 



" 9. Cambarus Harrisonii FAX. Form I X 6 



" 9'. The same. Form I X 6 



" 10. Cambarus propiuquus, var. Sauboruii FAX. Form I. . . . . . . . X 5 



" 10'. The same. Form I X 5 



" 10". The same. Form II X 6 



" 10". The same. Form II X 6 



PLATE X. 



First abdominal appendages of male. 



Fig 1. Cambarus Sloauii BUNDY. Form I. X 6 



" 1'. The same. Form I .... X 



" 1". The same. Form II X 8 



" l a/ . The same. Form II X 8 



" 2. Cambarus compressus FAX. Form I X 8 



" 2'. The same. Form 1 X 8 



" 2 a . The same. Form II X 12 



" 2 a '. The same. Form II X 12 



" 3. Cambariis Alabamensis FAX. Form I X ( i 



" 3'. The same. Form I X 6 



" 3. The same. Form II. X 6 



" 3"'. The same. Form II X 6 



" 4. Cambarus Mississippiensis FAX. Form I X 6 



" 4'. The same. Form I X 6 



" 4". Tlie same. Form II X 6 



" 4"'. The same. Form II X 6 



* The outer ramus was warped l>y drying when thi; spc'ciineu was in the artist's hands. 



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