EXPLANATION OF THE PLATES. 185 



PLATE IX. 

 I ■ i abdominal appendages of male. 



Fig. 1". Cambarus hamulatus Fax. Form II . . . X 12 



" 1»'. The same. Form II X 12 



" 2". Cambarus Girardianus Fax. Form II X 10 



'• ■>*'. The same. Form II X 10 



" 3. Cambarus cornutus Fax. Form I X 



" 3'. The same. Fun,. I X 



I. Cambarus medius Fax.* Form I X 6 



" 4'. The same. Form I • X '» 



" 5. Cambarus forceps Fax. Form I X8 



" 5 r . The same. Form I X 8 



" 5 a . The same. Form II ■ . . . X 8 



" 5". The same. Form II X 8 



" 6. Cambarus Putnami Fax. Form I X4] 



" 6'. The same. Form I X 4| 



" (')». The same. Form II X S 



" 6". The same. Form II X 8 



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



" 7'. The same. Form I X <> 



" 7 a . Cambarus spiuosus Bundy. Etowah River, Ga. Form II X 4 



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



" 8. Cambarus rustious Gib. Yellow Springs, Ohio. Form I X 



" 8'. The same. Form I , X 6 



" 8°. The same. Form II X 



" 8". The same. Form II X 6 



" 9. Cambarus Harrisonii Fax. Form I. X <> 



" 9'. The same. Form I X 6 



" 10. Cambarus propinquus, var. Sanboruii Fax. Form I. . . . . . . X 5 



" 10'. The same. Form I X 5 



" lO. The same. Form II X 6 



" 10". The same. Form II X 6 



PLATE X. 



First abdominal appendages of male. 



Fig 1. Cambarus Sloanii Bundy. Form I. X 6 



" V. The same. Form I X 6 



" 1". The same. Form II. X 8 



" 1". The same. Form II X 8 



" 2. Cambarus compressus Fax. Form I X 8 



" 2'. The sain,. Form I X 8 



" 2°. The same. Form II X 12 



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



" 8. Cambarus Alabamensis Fax. Form I X 6 



" 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 '> 



'• I'. The same. Form I X 6 



" 4". The same. Form II X 



" 1". The same. Form II X <> 



* Th 1 ii ped by drying when the B] imen was in the artist's hands. 



24 



