CINCLUS. 59 
Margarops densirostris (Vic11t.), Scrater, P. Z. 8.1859, 336. Guada- 
loupe and Martinique. 
montanus (Larr.), Scr. P. Z. S. 1859, 336. Guadaloupe. 
Cichlerminia bomapartii (Larr.), Scuater, P. Z, S. 1859, 335. 
Guadaloupe. 
Cinclocerthia ruficauda (Govutp), Scnarer, Catal. 1861, 7, no. 45. 
Guadaloupe. 
gutturalis, Scuater, P. Z. S. 1859, 358. Martinique. 
Mimus domimicus, Scrater, P. Z. 8. 1859, 341. St. Domingo. 
gumdiachi (Cas.), Scuarer, P. Z. 8. 1859, 342, Cuba. 
Harporhynchus ocellatus, Scuater, Catal. 1862, 358, no. 49. Oax- 
aca, Mex. 
The following species are mentioned as occurring in Tobago and 
Trinidad. All of them are in the collection of the Institution from 
South America :— 
Turdus phzopysus, Scrarer, Catal, 1861,3. Tobago; Venezuela, etc. 
symnophthalmus (Cas.), Scr. Catal. 1861, 4. Tobago; 
Venezuela, etc. 
xanthoscelis, Jarpiyz, Scu. Catal. 1861, 5. Tobago (Bogota, 
Verreauz). 
Mimus melanopterus, Lawe. Sct. Catal. 1861,9. Trinidad; Venezuela. 
Famity CINCLID. 
CINCLUS, Becust. 
Cinclus, Becust. “Gemein. Naturg. 1802.” (Type Sturnus cinclus, L.) 
Hydrobata, Virint. Analyse, 1816.—Barrp, Birds N. Am. 1858, 229.! 
There are three well marked species of this genus in America: 
one entirely dusky (C. mexicanus); one dusky, with white head 
! After a careful consideration of the subject I have come to the conclusion 
that as followers of the Linnean binomial system of nomenclature, we are not 
authorized to adopt any genus which is not based by its author upon some 
particular object having a specific name avowedly used in the Linnzan bi- 
nomial sense. For this reason I begin my reference to the genera of Linnzeus 
with the 10th edition (4758) of the Systema Nature (the first in which the 
binomial system is presented) ; not adopting a name from an earlier edition 
of the same author, where it would conflict with the one mentioned. This is 
substantially the rule of the British Association, which, however, selects the 
