BARNACLES OF JAPAN AND BERING SEA. 69 
The rostral latus is oblong, the lateral margin longer than the rostral; upper and lower margins 
subparallel. 
The inframedian latus is fan-shaped, wide in the upper part, tapering from the middle to the very 
narrow base, where the umbo is situated. 
The carinal latus is triangular, the umbo projecting a little at the baso-carinal angle, there is a 
short, straight face opposed to the upper latus and a long, slightly concave margin opposed to the 
inframedian latus. 
The peduncle is closely covered with rather small scales in about 15 rows of 12 to 15 scales each. 
Some of the longitudinal rows do not reach to the base of the peduncle, the scales being somewhat 
irregularly arranged in places. 
Length of the capitulum, 19.5 mm.; width, 11 mm.; length of the carina, 19 mm.; diameter at 
base, 3 mm.; length of the peduncle, 6.5 mm. 
Fig. 3 . — Scalpellum molliculum. A, basal segments of cirrus vi with terminal appendage; B, maxilla; C, 16th segment 
of cirrus v; D, mandible. 
The type specimen was dissected. The mandible is very similar to that of 5 . japonicum, differing 
only in being a little more slender, with fewer spines at the lower point (fig. 3, D). 
The maxilla (fig. 3, B) is also like that of S. japonicum. As in that species, the upper spine stands 
alone, then two great spines diverge from a common base. 
The first cirrus has unequal rami of 8 and 1 1 segments. The later cirri have segments with four 
pairs of large and one of minute spines at the anterior edge. They do not differ materially from those 
of 5 . japonicum (fig. 3, C, 16th segment of cirrus v). 
The terminal appendages consist of 9 segments, the last 6 copiously spinose at the articulations. 
The total length, exclusive of the terminal spines, is nearly 4 mm. 
This species differs from 5 . japonicum by the shapes of the upper, inframedian, and rostral latera, 
and especially by the more numerous scales of the peduncle. The plates are also more fully calcified, 
