HRDLICKA ] BRAIN WEIGHT IN VERTEBRATES 105 
I. ARRANGEMENT BY SPECIES.—Continued. 
BIRDS. 
PsITTACI : Psittacide. 
| Propor- 
: 7 Stage of State of Weight of | Weight of | en of 
Object. 3 | Life. Body. Body. | Brain. | Brain to 
| Body. 
224,439 Callopsittacus no-| ¢ | adult. medium. SLO) OT. |) 2a7/5 OT: | I: 28 
vee hollandize | 
Brotogerys jugularis fe a és 37.0 PO 2 ean 20 
Cacatuide. 
Cacatua moluccensis ? ? | medium. | 335.0 gr. | 7.0 gr. | Llp 20s: 
RAPTORES : Lalconide. 
224,957 Aquila chryszetos ie adult. medium. ~e Tf Dole | a= 
224,747.. ~$ ee ? ee ee 52720 Ot wt O.OMy &|ebes) 202 
224,995 Buteo lineatus & young. BC 337-0 7.4 |r: 46 
Buteo lineatus ? adult. es 642.0 fst lake 690 
224,912 Falco sparverius ? ? p 75.0 2276 WR 27 
228,126 Maricoba Hawk ? adult. |somewhat| 330.0 6.05 | La 55 
emaciated. | 
Cathartide. 
224,449 Cathartes aura /Q@ | adult. medium. | 2381.4 gr Hineyeae: Mi 2 Bias 
224,937 6c “ce ? 6c 66 == 10.2 easy 
Cathartes aura a -somewhat} 2065.0 10.8 Desa 
emaciated. 
a ae ? Ce somewhat) 1530.0 9.85 1, tus 
emaciated. 
Burbonide. 
224,982 Megascops asio & | adult. medium. | 129.8 5.6 P23 
228,081 Strix pratincola r os 26 405.0 6.7 I: 60 
224,007.“ Be fr oe ee 419.0 8.0 Liee52 
224,981 Sirnium varium ? ot Ce B25 12.5 PEs 46 
224, O46, °° ot a vl ce 676.0 r20 te750 
Nyctea nyctea ? oG | ac 1049.0 15.4 I: 68 
224,827 Bubo virginianus ? ce | be 952.0 13.65 L370 
225-110. *< ee ip os OF | 1232.5 14.42 TeseO5 
rat STEGANOPODES : Anhingide. 
228,053 Anhinga anhinga § g | adult. | medium. | 560.0 gr. | 4.23 gr. |x 132 
228,051 s§ as fe) ss oe 610.0 4.55 I: 134 
22BIOR Ta 1 ate ee a Of ot 1040.0 4.45 I: 234 
HERODIONES : Ardeide. 
228,071 Florida cerulea ? | adult Mediums eet 7ZO.5 Or: |) 35712rs || 1 48 
228,091 ue ue ares ae uC 401.0 3.78 I: 106 
Ardea herodias sl ? es 1900.0 8.85 L216 
228,062 Ardea herodias fed & ae 2055.0 10.2 T2Ok 
228,137 Ardea tricolor rufi- | ? adult | ee 324.5 3-45 L304 
collis | 
228,153. Botaurus lentigi- | ? - | ee 378.0 5-15 Teas 3 
nosus | 
228,121 Botaurus lentigi-| ? cs aL 429.5 4.4 I: 98 
nosus 
228,813 Nycticorax neevius | ? 6 a 420.0 7.0 1156, 1076) 
