ON THE MYOLOGY OF OPISTHOCOMUS CRISTATUS. 
PLATE LXVI. 
Fig. 1. Muscles of tail (dorsal aspect). Full size. 
a. Levator caude superficialis. gg. Tensor fasciz femoris and gluteus 
b. Levator caude profundus. | externus. 
d'. Pubo-coccygeus. _ h. Biceps. 
d. Abductor caude anterior. z. Gracilis. 
c. Coccygeus quadratus. | p. Rump-gland. 
f. Sartorius. 
Fig. 2. Ventral muscles of tail (full size). 
Nos. 1-10. Tail-feathers. rr. Depressor caude superficialis. 
t. Opponens rectricis caude. | pp. Femoro-caudal. 
Fig. 3. Left foot, dorsal aspect (full size). 
Fig. 4. Left foot, ventral aspect. 
