BARNACLES FROM THE NORTH PACIFIC — HENRY 229 



to two sides (compare vrith fig. 1, c). In this respect L. pectinata 

 pacifica resembles L. fascicidarls. 



The carina extends abont halfway between the terga. It is rounded 

 at the apex and is approximately the same width until just above the 

 fork, where it is slightly narrower. The fork is a little wider than 

 the carina, and the prongs, which are thin and pointed, diverge at an 

 angle of approximately 180° as in the typical form. The rim between 



Figure 3. — Lepas pectinata: a. Maxilla, X 31 ; ?), mandible. 



ectinata: a. Maxilla, X 31 ; h, mandible. X 31 ; c, filamentary append 

 age, X 64 ; d, middle segment of cirrus VI, X T. 



the prongs is not reflexed. The fork is not deeply embedded in the 

 membrane. 



The peduncle varies in length and unlike the typical form is often 

 longer than the capitulum. It is smooth, and no spines occur on the 

 peduncle of young individuals. 



One filamentary appendage occurs posteriorly at the base of each 

 first cirrus (fig. 3, c). They do not develop until the capitulum is 

 about 7 mm. in length and at first are extremely small. In larger 

 individuals they are short and thick with a blunt end. 



The mouth parts, particularly the maxillae and mandibles (figs. 

 3, 6f, 5), are variable as in the typical form. The palpi are narrow at 



