THE MOLLUSCA—HEDLEY. 435 
spire, the penultimate whorl has ten and those 
above a proportionate decrease ; they are weak at 
the suture, which they barely sinuate, and gain 
in breadth and height as they cross the whorl, 
projecting over the suture beneath them. They 
do not cross continuously from whorl to whorl, nor 
do they regularly alternate; they grow evanescent 
on the last whorl and cease with a stout and heavy 
varix one-third of the whorl behind the aperture. 
In this latter space, reminiscences of them occur 
as tubercles on the angle and at the suture. On 
the last whorl about twenty fine spiral threads are 
evenly distributed between the suture and the 
anterior point of the shell; the uppermost of these ascend the 
spire and are alike prominent on ribs and interspaces. Aperture 
perpendicular, subtriangular ; columella sharply sinuate, anterior 
notch not produced into a canal; callus on body whorl slight ; 
outer lip thickened slightly and reflected, angled sharply at the 
posterior insertion. Length 44, breadth 2 mm. 
Seven examples from the lagoon beach. Perhaps this is a 
member of the subgenus Colina. 
CERITHIUM PIPERITUM, Sowerby. 
Tryon, Joc. cit., p. 144, pl. xxvii., figs. 31, 32. 
Mr. G. Sweet procured a few dead shells of this species at Funa- 
futi. It had previously been recorded from the Ellice by Schmeltz, 
and also from Upolu and Rarotonga. There are examples from 
Tahiti in this Museum. 
CERITHIUM OBELISCUS, Bruguwicre. 
Tryon, Joc. cit., p. 146, pl. xxvii., fig. 39. 
One specimen from the lagoon beach. Melvill and Standen 
report this from the Loyalties; Schmeltz from Fiji and Cook’s 
Islands; and Smith from Tonga.* In this Museum it is represented 
from Cooktown and Port Curtis, Queensland, also New Caledonia, 
Lord Howe Island and Hawaii. 
CERITHIUM OBELISCUS, var. CEDO-NULLI, Sowerby. 
Tryon is here followed in reducing this to varietal rank. In 
Funafuti it is represented by an extremely small and stout 
individual, 22 mm. long. First found at Anaa, Paumotus. 
CERITHIUM ASPERUM, Linne. 
Tryon, loc. cit., p. 148, pl. xxviii., figs. 62, 63. 
One of the commonest shells on the lagoon beach ; the lineated 
form dominant. It was taken by the ‘“Chevert” in Torres Straits, 
* Smith—Proc. Zool. Soc., 1891, p. 416, 
