THE SESSILE BARNACLES. 239 



Lepas calccolus was merely mentioned by Pallas as adhering to 

 Gorgonia verrucosa, and covered by its bark. Since there is no de- 

 scription whatever, and no reference to a figure, or to Ellis, the name 

 is absolutely nude, and does not prejudice Darwin's subsequent use. 

 It may or may not be Darwin's species. 1 



BALANUS SCAND5NS, uew species. 



Plate 56, figs. 2-2d. 



Type. Cat. No. 48048 U.S.N.M., from Albatross station 3716, off 

 Ose-Zaki, Honshu Island, Japan, in 65 to 125 fathoms. 



The barnacle has rather thin, impervious compartments and basis 

 and is oval in peripheral contour, the outlines rounded below, ob- 

 liquely conic above the periphery, which is angular at the sides and 

 rostral end, rounded at the carinal end. The surface is smooth. The 

 carina is steep, almost vertical, rostrum sloping, but not produced 

 in a point, and not clasping or approaching the supporting stem, 

 which is clasped only by the bottom of the basal cup. When cleaned, 

 the compartments are lilac tinted with whitish vertical lines, fading 

 to white below, the radii rather narrow and white, basis whitish. 

 The carinolateral compartments have narrow, bandlike parietes, 

 nearly as wide at apex as at the base. Inside, the parietes are ribbed 

 below the sheath ; basis also ribbed very close to the periphery, else- 

 Avhere smooth. The sheath is very long, about three-fourths the 

 length of the compartments, and of a dull lilac tint. 



The scutum has distinct but not prominent growth-ridges; alter- 

 nate ridges appearing on the inflected occludent margin as prominent, 

 oblique teeth. The articular ridge is rather low, somewhat reflexed, 

 about two-thirds the length of the tergal border and truncate at the 

 end. Articular furrow rather deep but narrow. There is no ad- 

 ductor ridge. Pit for the lateral depressor muscle small and very 

 close to the edge. 



The tergum is broad, flat, with fine, sinuous growth-ridges exter- 

 nally, the carinal margin much shorter than the scutal, and making 

 with it an angle decidedly less than a right angle. Articular ridge 

 low and close to the scutal margin. Spur short, very close to the 

 scutal border, more than half the width of the valve, its end ob- 

 liquely truncate. 



The labrum has three teeth on each side of the median notch 



(fig. 76a). 



The palpi have an irregular row of long spines on the face and a 

 double or triple series of short ones along the upper margin (fig. 76c). 



The mandibles have five teeth, the lower one more or less united 

 with the lower point (fig. 7G&). 



i See P. S. Pallas, Eleuchus Zoophytorum, 1766, p. 198. 



