291 
which is higher and shorter, the apices of both being marginal." 
Nevertheless the entire size of the rostrum is larger than the 
carina, on account of its greater height. 
The specimen from Bonomisaki was preserved in alcohol and 
gave opportunity for a dissection, whereas all the specimens from 
Zamboanga were dried. 
Of the mouth parts the man di ble is especially character- 
istic (Fig. 39). The upper part of the cutting edge is furnished with 
two rather adjacent strong teeth; the lower half 
of the edge is strongly pectinate, and in this 
pectinate part there are two more teeth, al- 
though not very strongly indicated by pro- 
minences of the margin. The lower angle of 
the mandible is siender and pointed. 
The maxi 11a has a very strong upper 
spine, and below this a small spine at the be¬ 
ginning of the deep excavation which occupies 
one half of the cutting edge. Below the ex¬ 
cavation the edge is armed with two longer 
and four short, strong spines. The greater part 
of the blade is covered with rather long hairs. 
The cirri are comparatively short. In cirrus I and II the 
rami are very unequal. In cirrus I the shorter ramus with its 13 
segments is half as long as the longer one which has 22 segments; 
in cirrus II the shorter ramus has only 9 segments, but it is never¬ 
theless also here half as long as the other ramus which counts 
23 segments. The other cirri have subequal rami, and their seg¬ 
ments are armed with three pairs of spines on their anterior side. 
The eau dal appen dages are siender and extraordinarily 
long, measuring about 4 /5 of the length of cirrus VI; they have 31 
segments. 
Penis is short, about 2 /3 the length of cirrus VI, sparsely 
hairy except at the distal end, where it has a tuft of rather long 
hairs. 
The large amount of specimens from Zamboanga furnish a good 
base for a study of the external features of the species, and its 
variations. In the majority of the specimens the right tergum and 
scutum are fixed, the left ones movable; this seems to be the 
Fig. 39. Verrnca alba- 
trossiana, 21 miles W. 
1/2 S. of Bonomisaki. 
a mandible, b maxilla. 
[X 48]. 
19* 
