CYPSELID^. 183 



Sul)onler 11. CO RACINE. 

 [Cy. Seebohm, Classif. B. p. 21.] 



Family CYPSELIDJ^ *. 



A. Palate aigitho^nathous. 



B. BasipterjgoiJ processes absent. 

 C All foiu* toes directed forwards. 



D. Hallux present and connected \\itli the jiexor perj'orans di<ji- 



tonim. 



E. Spinal feather-tract well defined on the neck, but forked on 



the upper back. 



Genus CYPSELUS. 

 lUigcr, rrodromus, p. 221) (1811). 



Cypselus apus. 



JJiriindo apus^ Liniuciih;, Syst. Xat. i. p. 344 (1766). 

 Cypselus apus, Sclater, P. Z. S. 1865, p. 504 ; Eyton, Ostcol. Av. 

 pi. A bis. 



The Common Swift. 



Hub. Europe and Western Asia, wintering in Africa. 



785. Skeleton. 0. C. 1517 a. Yurrell Coll. 



786. Natural skeleton : mounted (toes defective). 0. C. 1517. 



South Coll. 



787. Skeleton. O.C. 1517 b. Purchased. 



788. Skull. 0. C. 1818. I'urchased. 



789. Stcrnuiu. with shoulder-girdle. S. S. 1252. 



Presented by Professor W. K. Parker, F.R.S. 



790. Hyoidean arch. 



* Cf. Sclater, P. Z. S. 1805, p. r,04 ; Forbes, Ibis, 1882, p. :J8U; Slmfeklt, 

 P.Z. S. 1885, p. 880, 1880, p. 501 ; Lucas, Auk, jii. p. 444; Shufeldt, Auk, 

 iii. p. 491, iv. p. 8 ; Stcjneger, Auk, iv. p. 170; Lucas, Auk, iv. p. 171, 

 vi. p. 8 ; Parker, Zool. 1889, pp. 91 95. Cf. also Meyer, AbbiM. \'ogel- 

 Skelet. i. Taf. xlvi. ( ('iillocnlin fitriphni/a). 



