148 PHYLLOBRANCHIA. TURBONID. 
STIRPS I. 
Genus 67. SABAN@A. 
Turbo, Auctorum. 
Testa spiraliter elevata. Sutura angusta. Apertura feré 
rotundata, posticé acuminata. 
Animal ore rostriforme, elongatum, teres. Tentacula acu- 
minata, elongata, ad apicem obtusiuscula; externé ad basin 
dilatata oculigera. Ocu/i convexiusculi, rotundati. Pes ultra 
oculos non productus, anticé bilobus; lobi rotundati ; posticé 
rotundiusculus. 
Species omnes hujus generis in littore arenoso aut in thalas- 
sophyto inveniuntur. 
Shell spirally elevated behind; its suture narrow; its aper- 
ture rounded ; acuminated behind. 
Animal with an elongated, rostriform, rounded mouth. Ten- 
tacula acuminated, elongated ; their extremities rather obtuse ; 
their bases externally dilated bear the eyes, which are slightly 
convex and round. Foot not produced beyond the eyes; an- 
teriorly bilobate, the lobes rounded; behind slightly rounded. 
All the species of this genus are found on sandy shores, or 
on Fuci, Ulvee, &e. 
Synopsis Specierum. 
1. eburnea. Testa eburnea, elevatissima, ventricosa ; anfracti- 
bus sex, subventricosis, longitudinaliter crenulatis, basilari 
magno. Sutura profunda. Apertura rotundato-ovali. 
2. ventricosa. Testa pallido-cornea, conica, nitida, semitranspa- 
rente ; anfractibus sex, ventricosis, obscure rugulosis, basi- 
lari maximo. Apertura suborbiculari. 
3. rubra. Testa rufo-brunnea, conica, nitente, glabra ; anfracti- 
bus quinque, tenuiter ventricosis, basilari mediocri. Aper- 
tura suborbiculari. 
4. interrupta. Testa conica, nitente, transparente ; anfractibus 
quinque, tumidis, alté elevatis. Apertura subovali. Peri- 
tremate externé non valdé tenui. 
