46 Mr. W.S. MacrzEax on certain Birds of Cuba. 
curvature of slender beak are common to the Certhiade and 
Grallatores ; while the Cuculide approach to the Rasores in such 
genera as Corythair and Musophaga. The following table, 
therefore, will express several analogical relations of the utmost 
value. 
SCANSORES. INSESSORE S. AVES. 
PsirrrAcipz representing the . < DzNTIROsTRES, and therefore the . . RAPTORES. 
RHAMPHASTIDZ joining the . . CowrRosTRES, and forming part of . . INSESSORES. 
Cucutip# forming part of the’. ScANsonEs, and joining the.:... . . RASORES. 
CERTHIADE joining the . . . . TzNurrostres, and representing the GRALLATORES. 
Pictp% representing the . . . . Fissrrostres, and therefore the . . NATATORES. 
communem habet Picorum generi accedit.” And again, (p. 31,) in speaking of the 
affinities of the Woodpeckers, he says: “ Addite sunt duse species Pici, tridactylus et 
semirostris, quorum hic affinitatem longinquam quidem, sed tamen aliquam cum Rhyn- 
chope, item semirostri ave; ille autem cum Alcedine tridactylà indicat.” Neither of 
these relations, however, are truly those of affinity ; that of Picus semirostris to Rhyn- 
chops being one of analogy; and that of Picus tridactylus to Alcedo being one of analogy, 
or if not, of the affinity of transultation. i 
11. The 
