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ON THE JIYOLOOY OF OPISTHOlOMUS CKISTATUS. 



PLATE LXVI. 

 Fig. 1. Muscles of tail (dorsal aspect). Full size. 



a. Levator caudae superficialis. 



b. Levator caudse profundus. 

 d'. Pubo-coccygeus. 

 d. Abductor caudse anterior. 



c. Coccygeus quadratus. 

 f. Sartorius. 



Fig. 2. Ventral muscles of tail (full size) 



gg. Tensor fasciae femoris and gluteus 



externus. 

 h. Biceps. 

 i. Gracilis. 

 p. Rump-gland. 



Nos. 1-10. Tail-feathers. 

 t. Opponens rectricis caudse. 



rr. Depressor caudse superficialis. 

 pp. Femoro-caudal. 



Fig. 3. Left foot, dorsal aspect (full size). 

 Fig. 4. Left foot, ventral aspect. 



