THE SESSILE BARNACLES. 



101 



Herr "Weltner 1 records B. porcatus (=balanus) from various 

 points in Japan Hakodate, Enoshima, and Yokohama but on the 

 following page he inserts B. rostratus, without locality record, as one 

 of the species not contained in the Berlin collection. In Fauna 

 Arctica (p. 296) these specimens are discussed and one of them is 

 figured. It is, without doubt, B. rostratus. It may be surmised that 

 all of his Japanese records for porcatus really pertain to B. rostratus. 

 This mistake on the part of a zoologist expert in the determination of 

 barnacles is readily understood, for the really diagnostic character of 

 B. rostratus the presence of transverse septa in the parietal tubes- 

 was not mentioned in Hoek's description and can be seen only by 

 filing the wall or looking into the pores at the base. 



EUROPEAN. 



EAST AMERICAN. 



Verzeichnis, p. 268. 



