3988 



The Zoologist — May, 1874. 



February 12th. In alluding to this classification I abstain from 

 expressing any opinion, whether favorable or adverse. The muscles 

 which on account of their marked tendency to variation in birds most 

 attracted Mr. Garrod's attention were the femoro-caudal, the ac- 

 cessory femoro-caudal, the semitendinosus, the accessory semiten- 

 dinosus, and the ambiens. Observations of these five muscles have 

 been made on more than five hundred species of birds and on more 

 than six hundred specimens. 



The result of this laborious, if not exhaustive, examination is 

 the division of the class Aves into two subclasses, Homalogonati, 

 in which the ambiens is present, and Anomalogonati, from which it 

 is always absent : a further explanation of these terms is given in 

 a foot-note appended to each, thus — Homalogonati, with the knee 

 normal, that is, with the ambiens crossing it ; and Anomalogonati, 

 with the knee abnormal, that is, with the ambiens deficient. 

 In the table which follows no further characters are given, but 

 the names of different groups give a satisfactory idea of their 

 contents. 



Class AVES. 



Subclass HOMALOGONATI. 

 Ordeil. GALLIFORMES. 

 Cohort 1. Struthiones. 

 Favi. 1. Strutbiouidte. 

 Subf. 1. Struthioniuac. 

 „ 2. Rbeiua). 

 Fam. 2. Casuariidae. 

 „ 3. Aptcrjgidte. 

 „ 4. Tiuamida;. 

 Cohort 2. Gallinace£. 

 Fam. 1. Palamedeidae. 

 „ 2. Galliuse. 

 „ 3. RaUidfe. 

 „ 4. Otidida3. 

 Subf. 1. Otidinte. 



„ 2. Phceuicopterinae. 

 Fam. 5. Musophagida;. 

 „ 6. Cuculida3. 

 Subf. 1. Centropiuae. 

 „ 2. Cuculiuae. 

 Cohort 3. PsiTTACi. 



Order IT. ANSERIFORMES. 

 Cohort 1. Anseees. 

 Fam. 1. Anatidse. 

 „ 2. Splicniscida;. 

 „ 3. Colymbida3. 

 „ 4. Podicipidtc. 

 Cohort 2. Nasut^. 

 Fam. 1. Procellarida). 

 „ 2. Fulmaridae. 

 Subf. 1. Fulmarinas. 

 „ 2. Bulweriinse. 



Order III. CICONIIFOEMES. 

 Cohort 1. Pelargi. 



„ 2. CATHARTEiE. 



„ 3. Herodi^. 

 „ 4. Steganopodes. 

 Fam. 1. PhtethoutidEe. 



„ 2. Pelecanidaj. 



„ 3. Pbalacrocoridae. 



„ 4. Fregatidae. 



