636 



MR. A. H. GARROD ON 



June 17, 



Fregata aquila possesses the ambiens and the femoro-caudal, the 

 latter being very slender ; the accessory femoro-caudal, the semiten- 

 dinosus, the accessory semitendinosus, and the postacetabular por- 

 tion of the tensor fasciae are absent. 



Phaethon possesses the femoro-caudal (small), the semitendinosus 

 (strong), and the accessory semitendinosus ; the ambiens, the acces- 

 sory femoro-caudal, and the postacetabular portion of the tensor 

 fasciae are absent. In this bird the biceps cruris is inserted into the 

 fibula-head directly, without passing through a loop. 



The family Phalacrocoracida possess the ambiens*, the femoro- 



Fig. 4. 



Outer view of right thigh of Thalacrocorax carbo, dissected. 



tf, tensor fascia ; gl iv, gluteus quartus ; o e, obturator externus ; fe, femoro- 

 caudal ; Ad, adductor ; b, biceps ; st, semitendinosus ; sm, semimembrano- 

 sus ; Pb, pubis. 



caudal, and the semitendinosus ; the accessory femoro-caudal, the 

 accessory semitendinosus, and the postacetabular portion of the tensor 

 fasciae are absent. There is a peculiarity about the obturator ex- 



* Meckel did not find the ambiens in the Cormorant ; it is peculiar in that 

 it runs through the substance of the large triangular patella, in a bony canal. 



