484 



FUNAFUTI ATOLL. 



ATYS DACTYLUS, sp. nov. 



(Fig. 45). 



Shell date shaped, truncated above and below, 

 minutely perforate above, deeply and narrowly 

 umbilicate below. Colour white, glossy. Sculp- 

 ture from sixty to seventy, irregularly waved, 

 narrow, shallow grooves girdle the shell, between 

 which are smooth, flat topped lyrse, two or three 

 times their breadth; these are crossed at 

 irregular intervals by fine and coarse growth 

 lines. The aperture is vertical, longer than the 

 shell, narrowly arched, dilated above and below, 

 rather effuse anteriorly. Above, the lip rises 

 from the centre of the apical crater and folding 

 back almost covers the perforation ; the outer 

 Fig. 45. lip is straight and simple; the columella broadly 



reflexed,emarginate without, tuberculate within, 

 a short tongue of callus extends a little distance upwards along 

 the body whorl. Length 4J, breadth 2| mm. 

 One specimen from the lagoon beach. 



This species appears to approach nearest to A. Jeffrey si, Wein- 

 kauff, from the Mediterranean, which served Monterosato as type 

 for his genus Boxaniella. 



CYLICHNA ERECTA, sp. nov. 



(Fig. 46). 



Shell cylindrical, truncated above, bevelled out- 

 wardly round the vertex, rounded below and 

 compressed around the basal axis. Colour white. 

 Sculpture the only specimen is too worn for exact 

 description ; it seems to have been girt by numerous 

 broad and shallow spiral grooves. Aperture nearly 

 perpendicular ; lip produced medially ; columella 

 broadly reflected, apparently minutely plicated. 

 Spire umbilicate, a shallow crater into which each 

 whorl descends by steps. Length 4, breadth If mm. 

 A single rather worn example from the lagoon 

 beach. 



This species appears to be quite distinct from 

 Fig. 46. others of the genus. Those that share the cylindrical 

 shape being C. discus, Watson, more truncated 

 anteriorly ; C. protracta, Gould, three times larger ; C. involuta, 

 Adams, C. cylindracea, Pennant, and C. alba, Brown, which 

 appear to have the spire covered. No comparison can be 

 instituted with a mass of untigured species with which authors 

 (Adams being chief sinner) have oppressed descriptive conchology. 



