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following sub-family is through the genus Chenalopew. On the 
other hand, the genus Cereopsis appears to approach the Plee- 
| tropterine in its anatomy and habit. 
GENUS I. CEREOPSIS. 
ae Cuar. Pedes similibus genere sequenti. Rostrum breve, 
obtusum ; culmine arcuato. Nares cera tect, magne, et rotundate. 
i 
Ext. Cuar. Jeet as in the preceding. ill with a cere covering 
the nostrils; the culmen arched. Nostrils large, rounded. 
CrREopsis. Lath. 
Type. Cereopsis Nove Hollandia. 
Affinities. Another rather anomalous genus, more closely con- 
nected, however, with the geese than the preceding. 
GENUS II. CHLOEPHAGA. 
Ext. Cuar. fPedes robusti. Digitis posterioribus mediocribus, 
unguibus incurvatis instructis. MJembrana inter digitos anterius con- 
cavatis. Zarsi robusti longi. Rostrum robustum, culmine vix 
-arcuatum, ungue magna instructa. Nares lineares in medio rostri 
posite. Lamellé parve antice oblitere. 
Ext. CHar. Feet robust. Posterior toes moderate, armed with a. 
curved claw, with the membranes between the toes scolloped out in ~~ 
front. Tarsi large and strong. Bill robust, with the culmen slightly — 
arched; armed with a large nail. Nostrils linear, placed in the middle 
of the bill. Lameile small, obliterated anteriorly. 
Anas. Linn. 
BERNIcLA. Steph. 
CHLOEPHAGA nobis. -»* lb a, 
Tyre. Chloephaga Mag plea: 
GENUS III. BERNICLA. 
Ext. Cuar. Pedes parvi, digitis posterioribus non lobatis, unguibus 
-magnis instructis. TZarsielongati. Rostrum parvum, capite brevius. 
Nares lineares, in medio rostri posite. 
Ext. Car. eet small, with the posterior toes not lobated; the 
nails large. Tarsi elongate. Bill small, shorter than the head. 
Nostrils linear, placed in the middle of the bill. 
BERNICLA. Steph. 
Anas. Linn. 
Type. Bernicla jubata. 
3 
