OSTEOLOGY OF THE DODO. 523 
I subjoin the names of the parts and their symbols in Pl. LX VI. which appeared to 
me to call for special notice in this part of the osteology of Didus and Pezophaps. 
Parts of Metatarsus. 
marked | marked 
Emtocondyaracuyibyes al see eh oe a \" Adductoribridgel | 3 i050 sede ag 
Ectocondylar cavity . b Entocalcaneal process . . . .. 7 
Intercondylar process ¢ Kctocaleaneal process . . . .. §& 
Intercondylar triangular tract d Calcaneal canal t 
Entometatarsalridge . . 4... €@ @alcanealYeroave se cue ttn 
Entocondylar ridge ip | Postinternal depression. . . . . Uv 
Entogastrocnemial ridge . . . . gf | Postexternal depression w 
Entocondylar tuberosity . . . . h Ectogastrocnemial ridge . . . . @ 
Antinterosseal depression . . . . 2 Postinterosseal ridge y 
Ectometatarsal ridge . . ... & | iHietotrochleanridgersayae | seen nnn 
Entinterosseal canal. . . . . . ¢@ | Hiallucialsurfae. . . . . . . 1 
Ketinterosseal canal. . . . . . ™ iEntotrochlear mdse i. as alam sna 
Facet for “tibialis-anticus” tendon. » | Intertrochlear groove . . . . BorB 
Antinterosseal ridges... . . . 0 Posttrochlear depression . . . .  y 
Lower interosseal or ‘“ adductor” | Ectotrochlear depression an 
Giualyauterion onificen. Sue Go.) ip: | -Mntotrochlea s) 05 66. felee a pe) IE 
Lower interosseal or ‘ adductor” | Mesotrochlea. . . 2... . . Wl 
canal, posterior orifice . . . @ | KEctotrochlea. . . : : IV 
The “ hallucial facet’ is not tierhae above the entocondyle in Beconhaps fitted it is in 
Didus; the greater length of the metatarsus is due to elongation of the shaft between 
that surface and the subsidence of the calcaneal process. 
The shorter and stronger metatarsus of Didus indicates more powerful actions of the 
foot, in reference to the greater weight of body to support—perhaps, also, to more 
habitual and powerful applications in scratching up the soil. 
The longer and more slender metatarsus of Pezophaps relates, as Strickland justly 
observes’, to the lighter weight and more active movements of that bird, which seems 
to have preserved its existence to a later period (1735) than the Dodo, 
In a Memoir on the Apteryxr, read August 14th, 1838, and printed in the second 
volume of the ‘ Zoological Transactions’ (p. 257), the composition of the metatarsus is 
described as follows :—‘‘ The upper articular surface is formed by a single broad piece. 
The original separation of the bone below into three pieces is plainly indicated by two 
deep grooves on the anterior and posterior part of the proximal extremity ; the inter- 
mediate portion of bone is very narrow anteriorly, but broad and prominent on the 
opposite side” (p. 293). This prominence was indicated in subsequent Memoirs as the 
‘ Annals and Magazine of Nat. Hist. 2nd ser. yol. iii. 138. 
