552 FUNAFUTI ATOLL. 
This, the largest species of the genus, seems very close to S. 
tiedonia, Watson, from which I separate it by the contracted zone 
beneath the fasciole, larger size and less development of spiral 
sculpture. 
SCHISMOPE PLICATA, sp. nov. 
(Fig. 62.) 
Shell large for the genus, thin, 
subglobose, flattened above. Colour 
cream. Whorls three, rapidly in- 
creasing. Earlier whorls wound in 
the same plane, the last steeply 
descending, sharply angled at the 
fasciole, compressed and theninflated 
beneath it. Umbilicus moderate in 
width, deep, with smooth walls. 
Sculpture—both above and below 
the fasciole the shell is ornamented 
by about twenty-two prominent 
longitudinal ribs, which project 
most beneath the fasciole half a whorl behind the mouth, from 
thence on they diminish considerably. These are overridden by 
close, sharp, raised, spiral lines, which cross the interstices and 
denticulate the crests of the ribs, Slit pointed anteriorly, rounded 
posteriorly, in length about a sixth of the circumference of the 
shell. The fasciole, a broad gutter with raised margins, its trough 
septate by continuations of the longitudinal ribs, ascends the 
spire for a whorl and a half, as in other Pacific species. Aperture 
ovate, columella slightly reflected. Major diameter 2:3, minor 
1:7; height 2 mm. 
Dredged off Beacon Islet (Funamanu), in 150 fathoms, and off 
Tutaga in 150 and 50 —60 fathoms. 
This species stands nearest to S. ferriezi, Crosse, from which it 
is clearly distinguished by a more elevated spire, coarser sculpture 
and larger size. 
TEINOSTOMA QUALUM, var. PAUCICOSTAIUM, var. nov. 
(Fig. 63.) 
Underthis varietal name is distinguished 
a specimen, which, though probably imma- 
ture is larger than the type, measuring in 
major diameter 2 and in minor 1°32 mm. 
It has the same detail sculpture but carries 
sixteen ribs on the last whorl instead of 
twenty. The chief distinction however is 
that the ribs are continued to the suture 
instead of terminating at a distance there- 
from as in the type. 
Dredged at 150 fathoms off Beacon Islet (Funamanu). 
