554 



FUNAFUTI ATOLL. 



and contracting at the aperture. First two whorls smooth, the rest 

 sculptured by about forty, fine, close, even, flat-topped, spiral 

 lyrse ; parted by sharp, narrow interstices. On the base are 

 eight, raised, radiating bars of callus, unevenly set round the 

 umbilicus, like the spokes of a wheel. A fifth of a whorl behind 

 the aperture the scar of a former aperture has left a kind of 

 varix. Umbilicus small, its margin crenulate. Aperture oblique, 

 circular, entire; left margin barely recurved; lower right margin 

 advancing over the umbilicus in imbricating callous tongues; upper 

 right margin linked to the preceding whorl by a V-shaped callous 

 ridge. Major diameter 1'86, minor 1'76; height 1 - 16 mm. 



One specimen dredged in 200 fathoms off Tutaga Islet. 



By its small size and peculiarly sculptured base, this species is 

 sufficiently distinguished from the remainder of the genus. 



LIOTIA sp. 

 (Fig. 66.) 



Shell globose, rather flattened on the 

 base. Colour cream. Whorls three. Sculp- 

 ture eight equally spaced spiral lyrse, can- 

 cellated by the intersection of about eigh- 

 teen longitudinal ribs of equal size. Um- 

 bilicus narrow. Aperture unfinished. 

 Major diameter 1*16, minor 1'6; height 

 1-16 mm. 



One specimen in 200 fathoms off Tutaga 

 Islet. 



Fig. 66. 



This shell, though not adult, is evidently new. Its future 

 recognition should be ensured by the remarkable sculpture. 

 Probably it belongs near Liotia and possibly to the new genus 

 Mecoliotia. Until the important characters of the aperture are 

 known, no good end would be served by bestowing on it a specific 

 name. 



LIOTIA PARVISSIMA, sp, nov. 



(Fig. 67.) 



Shell minute, solid, turbinate. Colour 

 cream. Whorls four. Sculpture a 

 heavy, elevated keel on the shoulder, 

 two equally massive on the periphery, 

 and two smaller on the base. Across 

 keels and interstices run distant, longi- 

 tudinal, raised threads. Umbilicus 

 small, oblique narrow and deep. Aper- 

 ture, circular, oblique, with a short but 



Fig. 67. 



