CINCLUS. 59 



Margarops densirostris (Vieill.), Sclatek, P. Z. S. 1859, 336. Guada- 



loupe and Martinique. 

 montanus (Lafr.), Scl. P. Z. S. 1859,336. Guadaloupe. 

 Ciclilerminia lionapartii (Lafr.), Sclatek, P. Z. S. 1859, 335. 



Guadaloupe. 



Cinclocertliia ruficanda (Gould), Sclater, Catal. 1861, 7, no. 45. 

 Guadaloupe. 

 gutturalis, Sclatek, P. Z. S. 1859, 358. Martinique. 

 Mimus domillicus, Sclatek, P. Z. S. 1859, .341. St. Domingo. 

 gundlac&ii (Cab.), Sclater, P. Z. S. 1859, 342. Cuba. 



HarporJbyncbus ocellatus, Sclatek, Catal. 1862, 358, no. 49. Oax- 

 aca, Mex. 



The following species are mentioned as occnrring in Tobago and 

 Trinidad. All of them are in the collection of the Institution from 

 South America: — 



Turdus phaeopygus, Sclater, Catal, 1861, 3. Tobago; Venezuela, etc. 

 gymmoplltlialEUUS (Cab.), Scl. Catal. 1861, 4. Tobago; 



Venezuela, etc. 

 xantlioscelis, Jakdine, Scl. Catal. 1861, 5. Tobago (Bogota, 



Verreaux). 



Mimus melauopterus, Lawr. Scl. Catal. 18G1, 9. Trinidad ; Venezuela. 



Family CINCLID^. 



CINCLUS, Bechst, 



Cincliis, Bechst. "Gemein. Naturg. 1802." (Type Sfumus cinclas, L.) 

 Hydrohata, Vieill. Analyse, 1816.— Baikd, Birds N. Am. 1858, 229.' 



There are three well marked species of this genus in America : 

 one entirely dusky ((7. mexicanus) ; one dusky, with xA\\\q head 



' After a careful consideration of the subject I have come to the conclusion 

 that as followers of the LiunEean 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 Linnaean bi- 

 nomial sense. For this reason I begin my referen- e to tht> genera of Linnjeus 

 with the 10th edition (1758) of the Systema Naturae (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 



