44G 



FUNAFUTI ATOLL. 



crossed obliquely by numerous fine bars which bead the carinse. 

 The adult whorls are beset with two bead-ridges, carrying each 

 about sixteen gem mules 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. 



Fig. 32. 



The suture is deep and well denned. 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 Triforis, 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, T. limosa, 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 



