Proc. Zoou. Soc.—1889, No. XXI. 
1889.] CONVOLUTIONS IN BIRDS 309 
TABLE (continued). 
bones 
3 ry Loops. 
ae S| 
z Ii. | Iv. 
(\4 to 7 vr, cl | l, cl | Orthoccelous, closed, alter- 
| nating.  (Puffinus, Dio- 
Tubinares ............ medea, Ossifraga.) 
' 3 Spilral Z, cl | Mesogyrous ; last loop telo- 
( gyrous. (Procellaria.) 
kee: rorl |Z Z,cl | 1st, 2nd, Srd often telo- 
| gyrous; closed. 
Bae 3 Spiral r, cl | Ibis rubra; or one of the 
Seopa esate scorns { middle loops forms a long 
| left-handed spiral. (Pla- 
\ talea, Phenicopterus.) 
( 6 cl el Orthoccelous, the first three 
often telogyrous; often 
with numerous secondary 
Accipitres folds. 
Bop te ae 5 Spijral el Mesogyrous. All the Ac- 
| cipitres and Cathartes 
with irregular kinks above 
( the rectum. 
Cathartes: ..ecbececccck 6 2nd pericceelous. (Rest un- 
certain.) 
Lamellirostres ......... 5 or 6 r,o | ¢, cl | 2nd plagioccelous or peri- 
ceelous ; the others ortho- 
celous, the last three 
closed. 
Opisthocomus.........++- 4 i,cl | 1, cl | Orthocelous; 8rd with 
slight plagioccelous indi- 
cation. 
@menlidse sss. soc.c sc: 4 Z,cl | 1, el | Orthoccelous, apices of mid- 
dle loops often turned up, 
or the second plagio- 
ceelous. 
Musophagide ......... 3 l,ci | 1,0 | Isoccelous. 
Wolnidas tee Ae 3 1, 40 ... | [soccelous. 
roronidses |. i245. .25000 3 l, cl ... | Lsoccelous. 
Bucerotide ...........; 4 r,cl | 2,0 | Anti-orthoccelous. 
Ufpnpidse) .2.32.3.5:.403. 3 r,cl | 1,0 | Orthocelous; 2nd loop of 
Bucerotide not deve- 
loped. : 
Praidaee eer os ocetc + r,cl | l,o0 | Anti-orthocelous. 
Rhamphastide ......... 3 r,cl | 1,0 | Orthoecelous; 2nd loop of 
Picidee not developed. 
Alcedinidee............... 4 Z, 30 |Z, el, o | Isoccelous; 2nd loop forms 
a left-handed spiral. 
Coraciiformes ......... 4 Z,30 | 40 | Isoccelous. 
Sariges sss. a decrteee: a Gu iro Isoccelous with plagioccelous 
indications. 
Caprimulgide ... 3 l, el or Tsoccelous. 
x0 
Cypselide ............... 3 i, el Tsoccelous. 
Trochvlidse).o1. 2. esterase 3 Z, cl Tsoccelous, orthocclous. 
asserenia cw tsccseptce 3 l, o Mesogyrous, anticcelous. 
21 
