no. 1136. OBSERVATIONS ON THE ASTACIDJ1—FAX0X. 693 



Plate LXIV. 



Fig. 1. Cambarus palmeri longimanus Faxon. Male, Form I. Arthur, Texas, xf-. 

 (Mus. Comp. Zool.) 



2. The same, first abdominal appendage from the outside. X2£. 



3. The same, first abdominal appendage from the inside. X2£. 



4. Cambarus palmeri longimanus Faxon. First abdominal appendage of the 



male. Form II, from the outside. X2f . 



5. The same, from the inside. X2£. 



6. Cambarus palmeri longimanus Faxon. Annulus ventralis of female. Arthur, 



Texas. X2f. 



7. Cambarus erichsonianus Faxon. Greeneville, Tennessee. Xl. (No. 4347, Mus. 



Comp. Zool.) 



8. Cambarus erichsonianus Faxon. First abdominal appendage of the male, 



Form I, from the outside. Greeneville, Tennessee. 



9. The same, from the inside. 



10. Cambarus erichsonianus Faxon. First abdominal appendage of the male, 



Form II, from the outside. Greeneville, Tennessee. 



11. The same, from the inside. 



12. Cambarus erichsonianus Faxon. Annulus ventralis of female. Greeneville, 



Tennessee. 



Plate LXV. 



Fig. 1. Cambarus difficilisY anon. Male, Form I. McAlister, Indian Territory, xf. 

 (Mus. Comp. Zool.) 



2. The same, first abdominal appendage of the male from the outside. X2£. 



3. The same, first abdominal appendage of the male from the inside. X2f. 



4. Cambarus difficilis Faxon. Annulus ventralis of female. McAlister, Indian 



Territory. X2£. 



5. Cambarus meeki Faxon. Male, Form II. Piney, Arkansas. Xl. (Mus. 



Comp. Zool.) 



6. Cambarus meeki Faxon. Chela of female. Piney, Arkansas, xl. 



7. Cambarus meeki Faxon. First abdominal appendage of the male, Form II, 



from the outside. Piney, Arkansas. X2£. 



8. The same, from the inside. X2f. 



9. Cambarus meeki Faxon. Annulus ventralis of female. Piney, Arkansas. X2f. 



Plate LXVI. 



Fig. 1. Cambarus montezumw dugesii Faxon. Female. Guanajuato, Mexico. X2£. 

 (No. 16087, U.S.N.M.) 



2. Cambarus montezumce areolatus Faxon. Female. Cohahuila, Mexico. X2£. 



(No. 3650, Mus. Comp. Zool.) 



3. Cambarus montezumce occidentalis Faxon. Female. Mazatlan, Mexico. x2£. 



(No. 3652, Mus. Comp. Zool.) 



4. The same. Left chela, viewed from the outside. 



Plate LXVII. 



Fig. 1. Cambarus ehapalanus Faxon. Male, Form I. Lake Chapala, Mexico. X2J. 

 (No. 17698, U.S.N.M.) 



2. The same. Eight chela, viewed from the outside. X2£. 



3. Parastacus defossus Faxon. Montevideo, Uruguay. Xl|. (U.S.N.M.) 



4. The same. Eight chela, viewed from the outside. X !■£. 



