196 CYPRAIDA. 
and with a sutural canaliculate digitation accumbent on the spire, 
continued and recurved backwards. 
CERATOSIPHON, Gill, 1870. 
Syn.—Ornithopus (in part), Gardner, 1875. 
Disir.—Cret.; France. C. Moreausiana, d’Orb. (1x, 94). 
Shell fusiconic, with the spire considerably elevated, the canal 
produced into a long digitation recurved towards the left, and 
the labrum much alated and produced into spiniform digitations. 
Whorls concave or flat between the angle and suture, spirally 
striated, and with rib-like angular, median and anterior fascioles, 
of which the two former, at least, emit spiniform digitations, the 
suture emitting a digitiform canal accumbent on the spire and 
directed backwards. 
Distinguished by the elongated hamiform siphonal canal and 
the posterior canal co-ordinated with the facies of Aporrhais. 
STRUTHIOLARIA, Lam. 
Etym.—Struthio, an ostrich (-foot), from the form of the 
aperture. 
Distr.5 sp. Australia, New Zealand. S. nodulosa, Mart. 
(lix, 69). Fossil. Tertiary; N. Zeal., So. Ama. 
Animal with outer mantle-margin simple, tentacles cylindrical, 
eye-pedicels short, adnate with the tentacles externally, foot 
broad and short. Operculum claw-shaped, with an apical pro- 
jection. Shell turreted, whorls angular, aperture truncated in 
front, columella very oblique ; outer lip prominent in the middle, 
reflected and thickened in the adult, inner lip callous, expanded. 
PELICARIA, Gray. Shell elevated, turreted; spire of adult 
covered with enamel; aperture ovate; outer lip sinuous, thin, 
inner lip incrusted. A single species, S. scutulata, Mart. (lix, 70). 
LOXOTREMA, Gabb. Shell elongate, turreted, spire high; aper- 
ture with a very short canal in front; outer lip retreating above, 
sinuous below; inner lip heavily incrusted. 8S. turrita, Gabb 
(Ix, 95). 
DOLOPHANES, Gabb. Elongate-oval, spire elevated; umbilicus 
imperforate ; aperture semi-oval, inner lip acute, sinuous, ante- 
riorly terminating in a short, not emarginate canal. §S. melan- 
otdes, Gabb. Tertiary ; West Indies. 
Famity CYPRAID A. 
Shell convolute, enameled ; spire concealed by the last whorl, 
which is very large; aperture narrow, channeled at each end; 
outer lip (of adult) thickened, inflected. No operculum. 
Animal with a broad foot, truncated in front ; mantle expanded 
on each side, forming lobes, which meet over the back of the 
shell; these lobes are usually ornamented with tentacular fila- 
