912 MANUAL OF THE MOLLUSCA. 
Fossil, nearly 100 species are enumerated by D’Orbigny, 
ranging from the lias to the upper chalk; many of them are 
more nearly related to aporrhais (cerithiade). 
ROSsTELLARIA, Lam. 
Hiymology, rostellum, a little beak. 
Synonym, Fusus, Humphreys. 
Fxanyple, R. curta. Pl. IV., Fig. 4. 
Shell with an elongated spire; whorls numerous, flat; canals 
long, the posterior one running up the spire; outer lip more or 
less expanded, with only one sinus, and that close to the beak. — 
Distribution, 8 species. Red Sea, India, Borneo, China. 
fiange, 30 fathoms. 
Fossil, 80 species. Neocomian—chalk (= aporrhais?). 6 species. 
Eocene—. Britain, France, &c. 
The old tertiary species have the outer lip enormously ex- 
panded, and smooth-edged; they constitute the section hippo- 
chrenes of Montfort (e.g., Rost. ampla, Solander. London 
clay). 
Sub-genus 2 Spinigera, D’Orbigny. 1847. Shell like rostel. 
laria ; whorls keeled ; keel developed into a slender spine on the 
outer lip, and two on each whorl, forming lateral fringes, as in 
ranella. Fossil, 5 species. Inf. oolite—chalk. Britain, France. 
SERAPHS, Montfort. (Terebellum, Lam.) 
Litymology, diminutive of terebra, an auger. 
Shell smooth, sub-cylindrical ; spire short or none; aperture 
long and narrow, truncated below; outer lip thin. 
Distribution, 1 species. China. Philippines, 8 fathoms. 
(Cuming.) 
Fossil, 5 species. Hocene—. London, Paris. 
The animal of terebellwm has an operculum like strombus ; its 
eye-pedicels are simple, without tentacles. (Adams.) In one 
fossil species, 7, fusiforme, there is a short posterior canal, as in 
rostellaria, 
Famity IJ.—MvnricipZ@. 
Shell with a straight anterior canal; aperture entire behind. 
Animal with a broad foot; eyes sessile on the tentacles, cr at 
their base; branchial plumes two. Lingual ribbon long, linear ; 
rachis armed with a single series of dentated teeth; wnecini, 
single. Predatory on other mollusca. The two species belong- 
ing to the genus Cheletropis, Forbes =Sinusigera, D’Orbigny, 
