On the Genus Rectes. 435 



2. None of the dorsal vertebrae iu front of the sacrum are 

 aukylosed. 



3. The posterior processes of the ilia are widely separated. 



4. The coracoids are furnished with subclavicular processes. 



5. They are holorhinal. 



(). The hallux is always present, but its basal phalanx is 

 shorter than that of the other toes. 



7. All the dorsal vertebrae in front of the ankylosed sacral 

 vertebrae have ventral processes. 



8. The humerus is not pneumatic. 



9. They have no basipterygoid processes. 



10. The first digit of the manus is fused with the second 

 in the adult. 



11. The three metatarsal bones of the tarso-metatarsus are 

 very short, and are separated from each other throughout 

 their whole length by deep grooves. 



12. The bones of the forearm are all flattened. 



13. The scapula is very broad, not difi'ering very much iu 

 size from the keel of the sternum. 



Not only are the 10th, 11th, 12th, and 13th characters 

 each of them diagnostic, but the combination of the 1st, 

 5th, and 6th is so also. 



The Colymbi agree with the Impennes in more of these 

 characters than any other group does, and may possibly be 

 their nearest allies. 



XLIV. — Note on the Genus Rectes. By R. Bovvdler 

 Sharpe, F.L.S., F.Z.S., &c. 



Dr. a. B. Meyer has kindly lent me a series of skins of 

 Rectes, from New Guinea, along with the types of some 

 of his new species. In 1877, when I completed the third 

 volume of the ' Catalogue of Birds in the British Museum,' 

 I admitted four species of Rectes with a cap, viz. : — 



1. R. cirrhocephalus (=juv.), R. dichrous ( = ad.). 



2. R. urojjyyialis. 



3. R. tibialis. 



4. R. aruensis. 



