446 FUNAFUTI ATOLL. 
crossed obliquely by numerous fine bars which bead the carine. 
‘The adult whorls are beset with two bead-ridges, carrying each 
about sixteen gemmules of equal size to a whorl, vertically the 
gemmules run slightly oblique, between each ridge is a deep and 
narrow groove. In the antipenultimate whorl a thread appears 
in this groove and ultimately grows on the last whorl to a gem- 
mule row. A raised thread beneath the suture ascends for a few 
whorls. The last whorl is ornamented by this thread followed by 
a row of large gemmules, two rows of smaller ones, an incipient 
peripheral row and two minor, basal, subnodulose ridges. The 
gemmules are coloured, polished, hemispherical, truncated and 
shelved above, and stand nearly their diameter apart on the ridge. 
The suture is deep and well defined. Between the gemmules the 
surface is roughened by minute spiral threads cut by oblique 
growth lines, Aperture vertical, nearly square. Outer lip cross- 
ing the pillar in a spur. Anal notch a simple open fold. Canal 
short and briefly recurved. Length 4, breadth 1 mm. 
Shallow water in the Funafuti lagoon, several specimens. 
Seeing that Tryon, whose standard of description was not severe, 
concludes his monograph of the genus with a list of eighty un- 
recognizable Z7'riforis, I have no confidence that the species above 
described has not previously appeared in literature, though I am 
sure that it has never been properly characterised. It is probably 
near, and possibly identical with, 7. dimosa, Jousseaume. That 
writer (as repeated by Tyron) neglects the important details of 
apex, anal notch, etc., and the fact that the Funafuti shells are but 
