213 
but by no means strongly produced. The mandible has four main 
teeth in addition to the inner angle, which is blunt and covered 
with short spines. The first tooth is not widely separated from 
or much larger than the second tooth; between them there is a 
sharply pointed subsidiary tooth. The maxilla has a sinuous edge 
but is not notched; its inner angle is on a higher level than the 
rest of the edge and bears short spines closely set together; the 
external spines are not much longer than the others. The second 
maxilla is broad and also has a sinuous anterior margin. 
Male. Two of the specimens have males attached to the edge 
of their scuta. The capitulum is broad as compared with its length 
and somewhat inflated; the occludent margin is distinctly convex, 
the carinal margin nearly straight, sloping upwards and backwards 
from below. The peduncle is very short and indistinctly separated 
fiom the capitulum. There are five well calcified valves. The 
caiina is nairow; its base is on a level with that of the terga and 
its apex a little lower than that of these valves. The terga are 
large, subtriangular, often with the apex bent forwards towards 
the occludent margin, from which it is widely separated; their 
scutal region is broadly convex. The scuta are smaller than the 
terga and have their tergal margin broadly concave. The rostrum 
is broadly triangular but has its basal angles somewhat rouuded. 
Measurements. 
The following measurements refer in each case to the largest 
specimen examined: 
Hermaphrodite Male 
Length of capitulum 13 mm. 1.7 mm. 
— - peduncle 9 — 0.2 — 
Breadth of capitulum 7 — 0.8 — 
Habitat. 
There are three sets of specimens in the collection, all from 
Chinese seas. One set was taken at a depth of 60 fathoms in 
lat. 32° N. and long. 126° 50' E., a second at one of 350 fathoms 
in lat. 24° N. and long. 119° 31' E., and a third at Cape Salmin. 
