3 
174 ‘* ENDEAVOUR ” SCIENTIFIC RESULTS. 
margin. In the antero-lateral interambulacra the margin 
is densely clothed with secondary spines and 15-20 rather 
small primaries; there are also a few secondaries close to 
the mouth. In the lateral (or postero-lateral) areas the 
margin is densely coated with secondary and miliary spines 
and inwardly with 7 or 8 oblique series of large primaries, 
4-5 in each series. Within the subanal fasciole there is on 
each side a group of 10-12 primary spines, and below it is a 
triangular area (with apex towards mouth) well covered with 
secondary and miliary spines. All the rest of the oral surface 
seems bare, but is in reality sparsely covered with minute 
miliary spines and pedicellariz. The lip, however, bears a 
dense cluster of secondary spines, and there are smaller and 
less dense clusters on each side of the mouth, while similar 
spines are borne on the peristomal plates themselves. Phyl- 
lodes conspicuous, though in each one of the posterior pair 
there are only 7 of the ambulacral “‘ brushes.” Peristome 
covered by about 50 plates. Periproct covered by about 60 
plates, each with 1-4 miliary spines. 
Pedicellarie abundant, of 4 kinds, each of which has 3 
valves to make up the head; the valves of the globiferous 
pedicellarize are about 1mm. long, the terminal third or 
more encased in the glandular tissue ; these valves resemble 
those of Lovenia elongata as figured by Koehler!, but the 
blade narrows steadily to the truncate tip which terminates 
in 4 rather short but distinct teeth, lying practically in the 
same plane; the valves of the tridentate pedicellarize are 
about .80 mm. long and resemble those of Spatangus ; they 
are strongly curved, meeting only at tip; the base is higher 
than wide, the blade is less than half the length, and its own 
width (which is greatest distal to its middle) is less than half 
its own length ; its margin is smooth, becoming finely serrate 
near tip; the valves of the ophicephalous pedicellarie are 
only about .40 mm. long; they resemble very closely those 
of Maretia elevata as figured by Déderlein? ; the valves of 
the triphyllous pedicellariz are very small, about .20 mm. 
long, and are borne on the end of a very long neck ; they 
resemble very closely those of Metalia maculosa as figured by 
Koehler®. The triphyllous pedicellariz seem to occur every- 
where on the test, the ophicephalous are mainly if not alto- 
gether abactinal, the tridentate occur on both the upper and 
lower surfaces, but seem more abundant actinally, and the 
globiferous are actinal, occurring chiefly near the mouth. 
- Koehler—Indian Mus. Spat., 1914, pl. xix., fig. 27. 
. Déderlein—Valdivia Ech., 1906, pl. xlviii., fig. 6a-d. 
. Koehler—Indian Mus. Spat., 1914, pl. xix., fig. 70. 
eo ho = 
