Fig. 1. View of superficial muscles of right thigh of Majaqueus equinoctialis. 
P. Pelvis. s. Sartorius. gl.1. Gluteus primus. g. Gastrocnemius. b. Biceps. s.t. 
Semi-tendinosus. s.m. Semi-membranosus. 
Fig. 2. View of deeper thigh muscles of the same bird; the gluteus primus, biceps, 
and gastrocnemius (g'.) muscles cut and reflected to show the deeper parts. Lettering 
as above; also b’. cut end of biceps passing through the tendinous loop formed by 
the origin of the gastrocnemius. f.c. Femoro-caudal muscle. a,f.c. Its accessory head. 
o.e. Obturator externus. add. Adductor muscles. fv. Femoral vein. sc. Sciatic nerve 
and artery. o0.g. Oil gland. 
Fig. 3. The same parts in Oceanites oceancus. a.s.t. Accessory. semi-tendinosus 
muscle. Pb. Pubis. &. Rectrices. 
Fig. 4. Dissection of thigh of Pelecanoides, to show the absence of the accessory 
femoro-caudal muscle, and the abnormal course of the femoral vein, this passing over, 
instead of under, the femoro-caudal muscle. 0.4. Obturator internus. gl. Glutei. 
