PHYLLOBRANCHIA. TURBONIDZ. 155 
Animal with short tentacles, a little narrower at their points, 
which are obtuse, bearing eyes at their extremities. Eyes 
small. Opercule thin. | 
From the form of the shell this genus might be considered 
as belonging to the second Stirps, but the animal proves that 
it is more nearly allied to Sabanea than to any other of the 
British genera. 
1. Assrminta Grayana. Tab. IX. figs. 4, 5. 
A. testa glabra, nigrescente. 
Animal supra nigricans, subtus pallidé lutescente-albidum. 
Tentacula apice extremo hyalina. 
Habitat in paludibus salinis prope Greenwich in Cantia. Alt. 
2 une. 
Shell smooth and blackish. Height two-eighths of an 
inch. 
Animal blackish above, pale lutescent whitish below. Apex 
of the tentacles extremely transparent. 
Inhabits salt marshes near Greenwich in Kent. 
Genus 69. SCALARIA. 
Scalaria, Lamarck, Cuvier. 
Turbo, Auctorum. 
Testa glabra, altissimé turrita, forté transversim costata. 
Coste posticé reflexee. Apertura rotunda. Peritrema cras- 
sissimum. 
Animal: os in rostrum valdé elongatum productum, ad ba- 
sin utrinque cirrhis clavatis instructum. Tentacula longissima, 
acutissima. Pes brevis, posticé abrupté acuminatus. 
Shell smooth, very highly turrited, strongly ribbed trans- 
versely, the ribs reflexed. Aperture round ; its peritreme very 
thick. 
Animal: The mouth is produced into a very long rostrum, 
furnished on each side with clavate cirrhi. The tentacles very 
long and very sharp. The foot is short, and is abruptly atte- 
nuated behind. 
