300 Letters, Extracts, Notices, &^c. 



still nearer related to the Cypseli than I have been able to 

 show, — H. Gadow. 

 Cambridge, March 1st, 1895. 



Deep Flexor Tendons of Macro pteryx. — Mr. Lucas also 

 sends us a note upon the deep flexor tendons of the Swift 

 {Macropteryx coronata), which appear to differ from the 

 tendons of other Cypseli. In Cypselus alpinus [of. Garrod, 

 P. Z. S. 1875, p. 344) the two tendons of the deep flexor 

 muscles completely blend together before any tendons to the 

 toes are given off. But in Macropteryx the flexor hallucis 

 gives off a slip to the hallux, and is then continued on to 

 blend, not with the undivided tendon of the flexor communis, 

 but with that branch of it which goes to supply the fourth 

 digit. This curious arrangement is shown in the accom- 



panying cut. It does not agree with any of the seven modi- 

 fications of the arrangement of these tendons described and 

 figured by Garrod. But it is almost exactly like the ar- 

 rangement of the tendons in Scopus umbretta, figured by 

 Beddard (P. Z. S. 1891, p. 18, fig. 4 b). 



The Fertilization of Flowers by Birds. — We are well 

 accustomed to hear of the fertilization of flowers by insects ; 



