PKOCELLARIIDE. 



34a 



Family I. PROCELLARIIDiE. 



Key to the Subfamilies, 



Leg-bones shorter than the wing-bones; 

 tarsus never twice as long as the femur ; 

 basal phalanx of the middle toe sliorter 

 than the next two joints ; keel of the 

 sternum entirely ossified; tarsi covered in 

 front witli hexagonal scutes ; claws sharp 

 and compressed ; outer toe shorter than 

 the middle toe ; secondaries at least 13. . 



Leg-bones longer than the wing-bones ; 

 tarsus at least twice as long as the feuuir ; 

 basal phalanx of the middle toe as long as 

 or longer than the next two joints ; keel 

 of the sternum with a large fenestra ; tarsi 

 usually covered in front with a single 

 shield, or with transverse short scutes; 

 claws usually very fiat ; outer and middle 



[p. 343. 

 1. PRO CELL AJRIINM, 



toes subequal; secondaries 10 2. OCEANITINjE, 



[p. 358. 



Subfamily I. PROCELLARIINiE 



Key to the Genera. 



a. Tarsus longer than the middle toe and 

 claw ; tail not distinctly forked. 

 Tail rounded or nearly even 1 



h'. Tail cuneate 2. 



b. Tarsus not distinctly longer than the middle 

 toe and claw : tail distinctlv forked .... 3. 



Procellaria, p. 343. 

 Halocyptena, p. 340. 



OCEANODBOMA, p. 347. 



1. PROCELLARIA. 



Type. 



Procellaria, Linn. Sijst. Nat. i. p. 212 (17G6) ; Coues, 



Pr. Ac. Phil. 1804, p. 79 P. pelagica. 



Hydrobates, Boie, Isis, 1822, p. o62 P. pelagica. 



Thalassidroma, Viyors, Zool. Juuvn. ii. p. 405 (1825) . . P. pelagica. 



Range. Atlantic Ocean (chiefly north of the Equator), and Pacific 

 Ocean in the neighbourhood of the Galapagos Islands. 



Key to the Species. 



a. Tips of the longer u])per tail-coverts snoty-blaclc 



b. Upper tail-coverts wholly white 



pelagica, p. 343 

 tethys, p. 346. 



1. Procellaria pelagica. 



Peterel, Dampier, Voy. iii. p. 97 ; Alhin, N. H. Birds, iii. p. 87, pi. 92. 

 Storm-tinck or Pittrel, Catesb. Nat. Hist. Carol, ii. p. 14, pi. 14 



(1743) ; Penn. Brit. Zool. ii. p. 434, pi. 91 (1708). 

 Little Peteril, Edic. Nat. JIi.'<f. Bird^, p. 90. pi. 90. fig. 1 (1747). 

 Le Petrel, Briss. Oni. vi. p. 140, pi. 13. tig. 1 (1760). 

 L'Oiseau de 'f empete, Buff. Hist. Nat. Ois. x. p. 164 (1786) ; D'Aub. 



PL Eld. X. pi. 993. 



