196 cyprMit>je. 



and with a sutural canaliculate digitation accumbent on the spire, 

 continued and recurved backwards. 



Ceratosiphon, Gill, 1810. 



Si/n. — Ornithopus (in part), Gardner, 1815. 



Distr. — Cret. ; France. C. lloreausiana, d'Orb. (Ix, 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 fascicles, 

 of which the two former, at least, emit spiniform digitations, the 

 suture emitting a digitiform canal accumbent on the spire and 

 directed backwards. 



Distinguished hj the elongated hamiform siphonal canal and 

 the posterior canal co-ordinated with the fades of Aporrhais. 



Struthiolaria, Lam. 



Etym. — Struthio, an ostrich (-foot), from the form of the 

 aperture. 



Distr. — 5 sp. Australia, New Zealand. S. nodulosa^ Mai't. 

 (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 enanael ; aperture ovate ; outer lip sinuous, thin, 

 inner lip incrusted. A single species, S. scutulata., Mart, (lix, 10). 



LOXOTREMA, Gabb. Shell elongate, turreted, spire high ; aper- 

 ture with a A^ery short canal in front ; outer lip retreating above, 

 sinuous below ; inner lip heavily incrusted. B. 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- 

 oides, Gabb. Tertiary ; West Indies. 



Family CyPR^IPiE. 



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 usuall}^ ornamented with tentacular fila- 



