8U BULLETIN 60, UNITED STATES NATIONAL MUSEUM. 



scutiun. The carina is often dentate alontr the roof, and frequently 

 the scutum has an oblique series of square gra}' spots; but these fea- 

 tures are inconstant. Among many other lots, specimens are in the 

 collection from the following- 



Localities. — Atlantic: Vineyard Sound and Woods Hole, Massachu- 

 setts; Long Island Sound; off New Jersey, Station 2039; Key West; 

 Gulf of Mexico, Station 2879; Cameron, Louisiana; St. Thomas; Swan 

 Island, Caribbean Sea. Also man}^ European localities. 



Pacitic: Bering Island; Sitka; Unalaska; Straits of Fuca, Oregon; 

 San Diego, California; Panama; Japan. 



LEPAS HILLII Leach. 



Plate VIII, figfs. 2, 7. 



1851. Lepas hillii Leach, in Darwin, Monograph on the Cirripedia, p. 77. 



This common goose- barnacle is very similar to Z. anatifera., from 

 which it is chiefly to be distinguished b}' the smoother valves, the 

 absence of umbonal teeth within the scuta, and the presence of three 

 filaments on each side of the body, while Z. anatlfera has only one or 

 two. When fresh, the carina is separated from the other valves at 

 the base by a purplish cuticle, and the summit of the peduncle is pale 

 or orange colored. 



Local It ies. — Atlantic: Grand Manan, New Brunswick; Le Have 

 Bank. Pacific: Bering Island, abundant; Shumagin Island; Unalaska; 

 San Frant'isco. 



A variety caUforniensis Gruvel has been described fi-om Lower 

 California. It is not represented in the museum collection. 



LEPAS ANSERIFERA Linnaeus. 



Plate VIII, figs. 1, ;l 

 1851. Lepas anserifera Darwin, IMonograph on the Cirripedia, Lepadidie, j). 81. 



This species is commonly found on driftwood and also on floating- 

 seaweeds, in the latter case frequently associated with L. j>ecthiata. 

 The plates are grooved radial///, the tergum often more strongly than 

 the scutum, but the grooves vary greatly in emphasis. It differs 

 from Z. pectiiHita chiefly in the scutum and carina. The occludent 

 border of the scutum is strongly arched, forming a comparatively wide 

 area between the border and the ridge running from the umbo to the 

 apex of the plate, and the carina is not contracted just above the 

 fork. In Z. i^ectinata the ridge on the scutum runs ver}' close to the 

 less arcuate occludent border, leaving but a ver}^ narrow area, and 

 the carina viewed dorsally is conspicuously contracted just above the 

 basal fork. 



Localities. — Atlantic: Shetland Islands and Oban, Scotland; Cork, 

 Ireland; Fayal, Azores; south of Newfoundland, Hydrographic Sta- 



