^04 j\Ir. F. E. Beddard on the Anatomy 



The syrinx of the latter genus is represented iu figs. 20, 21, 

 which show anterior and lateral views of the organ. The 

 trachea divides into the two hronchi after the fashion, as 

 it has been remarked, of the trachea of a mammal. For the 

 space of about an inch each bronchus consists of perfectly 

 complete rings, of which there are 22 running right round the 

 tube. This region of the bronchus is therefore composed of 

 many more rings than in Crotophaga, which has rather less 

 than half the number. The intrinsic muscles of the syrinx 

 run down the bronchi and are inserted on to the third of 

 the bronchial semirings. This ring is bowed in form, the 

 concavity being downwards, and is, in fact, exactly like 

 the third bronchial semiring of typically tracheo-bronchial 

 syringes, 



A wide membranous space separates this ring from the 

 next, which, like it and the following, is cartilaginous. 

 The closed rings of the bronchi are ossified. 



With the first incomplete bronchial rings commences the 

 membrana tympaniformis interna, which continues to the 

 entrance of the bronchus into the lung. Herein the syrinx 

 of Carpococcyx agrees with that of Crotophaga. In Steat- 

 ornis, which represents for the Goatsuckers the most 

 extreme development of the bronchial syrinx, the membrana 

 tympaniformis interna is of more limited extent, being suc- 

 ceeded, as well as preceded, by complete closed rings. 



e. Muscular Anatomy. 

 The materials for a comparison of the muscular anatomy 

 of the fore limb in the Cuculidse does not at present exist, 

 since so small a number of types have been hitherto dis- 

 sected. Furbringer studied only the three genera Phceni- 

 cophaes, Zanclostomus, and Cuculus, including two species of 

 the last-named genus, and no other author seems to have 

 treated of their muscles in any detail. I hope to have 

 an opportunity later of examining some other genera of 

 Cuculidae. In the meantime I attempt to supplement 

 Prof. Fiirbringer's account by the record of the following 

 observations. They have been compared with his accounts 



