438 



FUNAFUTI ATOLL. 



A 



lip simple, sharp, columella arched, canal produced and recurved. 

 Length 18, breadth 8 mm. 



Several dead specimens collected on the lagoon beach of Funa- 

 futi. 



CERITHOPSIS EUTRAPELA, Melvill & Standen. 

 Melvill & Standen, Journ. Conch., viii., 1896, p. 301, pi. x, 



fig. 52. 



Three specimens, one mauve, the others white, from the lagoon 

 beach of Funafuti. 



CERITHOPSIS ELECTRINA, sp. nov. 

 (Fig. 26). 



Shell tall, slender, 

 thin and translucent. 

 Colour uniform pale 

 amber, except a glassy 

 white topmost whorl. 

 Whorls nine in my 

 example, whose tip is 

 broken. Sculpture 

 on the earlier whorls 

 proportionately fewer, 

 on the last, six spiral 

 alternately larger and 

 smaller rows of crowd- 

 ed gemmules, which 

 also regularly succeed 

 one another in longi- 

 tudinal order, being 

 continued across the suture from whorl to whorl and ascending 

 the spire obliquely. The individual gemmules, as seen in profile 

 are much elevated, seen in full face are oval ; those of the upper 

 four rows of the last whorl are impressed and bisected by a shallow 

 transverse groove, invisible in profile, but apparently doubling 

 the transverse rows of gemmules when seen in full face. Above 

 the first and below the fifth row, the longitudinal axis of each 

 continues as a pillar, giving a fluted aspect to the broad and 

 deep sutural excavation. The lowest row is swallowed by the 

 suture of the subsequent whorl. Beneath the sixth row the shell 

 is much undercut and then tapers to the columella. The aperture 

 is nearly square with sharp outer lip, arched columella, and very 

 short perpendicular canal. Length 4$, breadth 1 mm. 

 One specimen from the lagoon beach of Funafuti. 

 This appears to be distinguished from other Pacific Cerithiopsis 

 by the more numerous rows of closely packed granules. 



