72 
BULLETIN OF THE BUREAU OF FISHERIES. 
The principal differences of these specimens from the types of II. japonica are that while the animal 
is somewhat smaller, there are more joints in the cirri, and the teeth of the mandible are more slender. 
Heteralepas vetula, new species. [PL xii, fig. i, 2, 3.] 
Type no. 38689, U. S. National Museum. 
Type-locality: Albatross station 4934, off Kagoshima Gulf, in 152 fathoms. 
The capitulum is oval, plump, somewhat tubular toward the orifice, which is more than one-third 
the length of the capitulum, and has thin, flaring lips, but slightly crenulated. Along the back a suba- 
cute and rather high keel runs from peduncle to summit. The crest of the keel, while irregular, shows 
no tubercular prominences or nodes. A stout cord-like ridge runs along each side. These ridges meet 
at the baso-carinal extremity of the capitulum, and converge again at the apex, defining a broadly 
lanceolate dorsal area, which is somewhat smoother than the slightly wrinkled surface in front of the 
ridge. No scuta are visible. The capitulum passes rather gradually into the short peduncle, which is 
transversely wrinkled. 
Fig. 5 . — Heteralepas vetula. A, forty-first and forty-second segments of cirrus v; B, penis; C, mandible; D, maxilla; 
E, basal segments of cirrus vi and terminal appendage. 
Length of the capitulum 11 mm.; breadth 8 mm.; length of the peduncle 5 mm.; breadth 4.5 mm. 
The type specimen was dissected. The mandible (fig. 5, C) has three long conic teeth and a lower 
point, the latter with three short spines below the terminal point. 
The maxilla (fig. 5, D) has a deep recess below the major spine. Its edge is profusely spinose, the 
spines giving place to hairs at the lower angle. 
The first cirrus has very unequal rami of 13 and 23 segments, each with a distal circle of hairs. 
Cirri ii to iv have equal rami of very numerous segments, as usual in Heteralepas. Cirrus v has rami 11 
and 4.5 mm. long, composed of 57 and 22 segments. The outer ramus bears a pair of long spines at the 
anterior distal angle of each segment, with several very small ones, and two delicate small spines at the 
posterior distal angle (fig. 5, A, forty-first and forty-second segments of cirrus v). The smaller ramus 
bears only a few very small and delicate spines. The sixth cirrus resembles the fifth. 
The terminal appendage is very minute, not quite 2 mm. long, and consists of nine segments. There 
are a few small hairs at the distal articulations, and two at the end (fig. 5, E, t. app.). 
