414 PEOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



Fatinella Dall. Foot with a scalloped frill interrupted only in front; 

 gills as in Patella. 3 (2-14-2) 3 * 



Nacella Schumacher. Foot frilled ; gills very small in front ; shell pecu- 

 liar; lateral teeth all bidentate. 0— s ^ 7^ o^-q- 



B. Branchial cordon interrupted in front. 

 a. Sides of foot smooth. Helcion. 



Eelcion Montfort. Third laterals posterior, bidentate. . 



^ ' 3 (1-2-2-1) 3 



Helcioniscus Dall. First laterals anterior. 



3 (2-1-1-2) 3' 

 Patina Gray. Third laterals posterior, denticulate; shell peculiar. 







3 (1-2-2-1) 3' 



****** m 



Metoptoma Phillips. Posterior edge emarginate or waved. 

 Fossil in Carboniferous of Great Britain. 

 January 22, 1882. 



on TWO KE€ENT AUDITIOIVS TO THE IVORTES AilIERICA^V BIRJ>- 



FAUIVA, BY I>. BELOIIVO. 



By ROBEKT KIDGW^AY. 



1. Motacilla ocularis, Swiuhoe. (Ibis, 1860, p. 55). 



This species, which is the cominon East-Asiatic species, has been 

 taken at La Paz, Lower California, by Mr. Belding, who secured a 

 single adult specimen in winter plumage, on the 9th of January, 1882. 

 It was undoubtedly a straggler, but it seeois incredible that ic could 

 have fouud its way there across the broad expanse of the Pacilic Ocean. 

 On the other hand, it is difficult to conceive by what other means it 

 could have reached a locality so far from its natural habitat, not being- 

 known from any part of the Pacific coast of Xorth America, even in 

 Alaska, although specimeus have been obtained at Plover J>ay, Siberia. 

 In eastern Asia it occurs in winter as far south as Anioy, where it was 

 first discovered by Mr. Swinhoe. 



This species much resembles M. alba of Eurojie, having like it a gray 

 back, but differing in having a large white patch covering both rows 

 of wing-coverts, and in haviug a distinct post-ocular streak of black, 

 runniug into the black of the occiput. 



2. Dendroeca vieilloti bryanti, Ridgway. 



(Dcndroica vieilloti var. hryaiiti Ridgw. Am. Nat., vii, 1873, p. 606; B. B. & R., 

 Hist. N. Am. B., i, 1874, p. 218. — Dcndraca vieilloii Salvin & Godman, Biol, 

 Ceutr.-Am. Aves, i, 1879, 125, part.) 



This species, described originally from Yucatan, Ilouduras, and IVIa- 

 zatlan, was found to be quite common at La Paz, in January, 1882, by 



