8 Mr. W. A. Forbes on the late Professor Garrod's 



Prof. Garrod. Thus^ in Centropus phasianus^, though not in 

 Centropus rufipennis, or any of the other Cuculidae examined 

 by him, as well as in all the species of Pipridae and Cotingidae, 

 eight in number, dissected (except Rupicola crocea), the main 

 artery of the leg accompanies the femoral vein : it is a femoral 

 artery f. 



Again, in Dacelo gigantea and D. cervina\, the femoral 

 vein is replaced by one which lies between its normal position 

 and the sciatic artery, crossing over, instead of under, the 

 femoro-caudal muscle ; and the same is the case, as recorded 

 by him in an unpublished (and, unfortunately, unfinished) 

 paper " On the Anatomy of Pelecanoides/' in that singular 

 form of Petrel. These two cases are, I believe, the only ones 

 yet recorded of this unexpected arrangement. 



IV. The Muscles of the Thigh ^. 



The myology of birds was always one of Prof. Garrod^s 

 favourite subjects ; and of his various myological papers, the 

 two enumerated below may fairly be considered the most 

 important, as from the facts detailed therein he drew up, 

 m part, the only detailed scheme of a classification of birds 

 ever published by him. 



In the region of the thigh of birds there are six muscles, 

 which may or may not be present, though no known bird 

 wants them all. These six muscles are the ambiens, the glu- 

 teus primus, the semitendinosus, the accessory semitendinosus, 

 i\ie femoro-caudal, and the accessory femoro-caudal \\. 



"^ • P. Z. S. 1873, p. 629, note. 



+ Since writing: tlie above, I have found the same to be the case in my 

 specimens of Coryihaix inrsa (two), C. porphyreolopha, and C. erythrohpha, 

 and in Mtisoj^Imga violacea. In Schizorhis africana (two), however, the 

 normal condition persists. 



X p. Z. S. 1873, p. 629. 



§ " On certain Muscles of the Thigh in Birds, and on their Value in 

 Classification.— Part I.," P. Z. S. 1873, pp. 626-644 ; " Part n.," P. Z. S. 

 1874, pp. 111-123, pi. xvii. 



II It is not my object in this paper to discuss the homology of the 

 muscles here so named with those of other Vertebrata. 



