ON CERTAIN MUSCLES OF BIRDS. 195 
Species examined. 
Musophaga violacea. ee albo-cristata. 
Schizorhis africana. 
The Cuculide possess the ambiens, the femoro-caudal, the semiten- 
dinosus and the accessory semitendinosus, and the postacetabular por- 
tion of the tensor fasciz; they may be divided into two subfamilies, 
according to whether the accessory femoro-caudal is present or absent. 
The accessory femoro-caudal is present in 
Centropus senegalensis. Guira piririgua. 
phasianus. Phenicophaes, sp. 
The accessory femoro-caudal is absent in 
Cuculus canorus. Cacomantis sepuleralis. 
Chrysococcy2, sp. 
The Ramphastide possess the femoro-caudal, the semitendinosus, 
the accessory semitendinosus, and the postacetabular portion of the 
tensor fascie; the ambiens and the accessory femoro-caudal are 
absent. 
Species examined. 
Ramphastos carinatus. Ramphastos cuvieri. 
-—— ariel. 
The Capitonide possess the femoro-caudal, the semitendinosus, the 
accessory semitendinosus, and the postacetabular portion of the tensor 
fasciee; the ambiens and the accessory femoro-caudal are absent. 
Species examined. 
Megalema asiatica. Indicator major. 
Barbatula duchaillua. 
The Psittaci possess the femoro-caudal well developed, the semi- 
tendinosus, and the accessory semitendinosus; the accessory femoro- 
caudal and postacetabular portion of the tensor fasciz are absent. The 
ambiens may be present normally; it may be differentiated in the 
thigh, but fail to cross the knee, being lost on the fascia over it, or it 
may be absent. 
The ambiens is present in the following species :-— 
Psittacus erithacus. Ara macao. 
* Conurus zantholemus. chloroptera. 
jendaya. Caica melanocephala. 
N petat. Nestor notabilis. 
a — holochlorus. hypopolius. 
The ambiens is present, but does not cross the knee in 
eS Stringops habroptilus. 
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