THE SESSILE BARNACLES. 163 



BALANUS BALANUS PUGETENSIS, new subspecies. 



Tlate 36, figs. 9, 10-10&. 



Type. Cat. No. 2040, A. N. S. P., San Juan Islands, Puget Sound, 

 between 10 and 50 fathoms, on Pecten, collected by Homer Wheeler, 

 1910. 



The barnacle is rather small and thin, with steep walls and a large 

 orifice, not ribbed, dirty whitish, the parietes dull, more or less 

 roughened, radii usually glossy, with the summits slightly oblique 

 and jagged, level in the rostrum. Parietes have rather large tubes, 



FIG. 48. BALANOS BALANUS PUGETENSIS. a, 15TH SEGMENT OF THE ANTERIOR RAMUS OF 



CIRRUS IV. 6, 9TH SEGMENT OF ANTERIOR RAMUS OF CIRRUS III. C, 21ST AND 22D SEG- 

 MENTS OF CIRRUS VI. (1, LABRUM ; ALL OF THE TYPE. , LAERUM OF SPECIMEN FROM 

 STATION 2864. 



not septate, and filled up solidly in the upper part (pi. 30, fig. 9). 

 Rostrum with 11 to 16 tubes. 



Carinorostral diameter of base 21 mm.; height, 18 mm. 



Opercular valves as in the typical form, except that the longitu- 

 dinal striae of the scutum are delicate and weak, and the growth 

 ridges have an appearance of imbricating, like shingles. The valve 

 is curved between apex and base, and has a rather deep, narrow pit 

 for the depressor muscle. 



The labrum has two and three small teeth in the type-specimen 

 (fig. 4:8d). In one from Albatross station 2861 there are three very 



