266 
Genus Lepas. 
Lepas anatifeva Linné. 
Aburatsubo, Misaki, attached to a well. 29/VI 14. Two specimens. 
These two specimens afford great interest; the well had only 
been in the water one month, so that this is the highest age pos- 
sible in the specimens. Our knowledge of the growth of the cirri- 
peds is so scanty, that every example is welcome here. The di¬ 
mensions of the specimens in mm were as follows: 
Capitulum Peduncle 
,- A -V ,- A -S 
length greatest width length width 
I 11,5 7 6 1,5 
II 14 10 6 3,6 
For comparison we may add that Hoek (1907) under Lepas 
anserifera reports of some specimens attached to the keel of „Si- 
boga“ that they had attained a capitulum size of 21 mm 40 days 
after the ship had been docked in Surabaja. — 
The lines of growth are very distinet in the specimens, and 
were counted in scutum, and tergum of the same side. In the 
specimen I tergum had 9, scutum 12 zones of growth, in the spec- 
imen II the numbers were 15, and 17. This result again confirms 
the observations on other cirripeds that the lines of growth cannot 
here correspond to outer circumstances, and afford no base what- 
ever for a judgment of age or growth of the animal. 
Lepas pectinata Spengler. 
36° 00’ S., 150° 20’ E., surface. 29/IX 14. „Endeavour“. Agreat many 
specimens, partly attached to an Os sepia , partly to shells of 
Janthina. 
37° 05’ S., 150° 05’ E.; 50 fathoms, sand and mud. 30/IX 14. „End- 
eavour“. One small specimen. 
Taboga, Panama; surface. December 1915. A cluster of adult specimens 
on a piece of drift wood. 
Annandale (1909) has given a report of his difficulties in 
distinguishing between the present species and Lepas anserifera 
Linné. While the specimens from Taboga entirely agree with 
both Darwin’s (1852) and Gru ve l’s (1905) descriptions of Lepas 
pectinata, the other specimens caused some hesitation, because 
