lines, breadth 4 lines. 
This rare shell differs from T Tumidus, in the strie 
being stronger and less numerous ; the volutions are 
not so much rounded, nor are they flattened at the top 
as in that species. 
SerPuLaA. Sonirar1a.—Bean.—Shell cylindrical, 
opaque, white, gradually tapering to a point and 
wrinkled transversely, fixed at the smaller end to 
Dentularia abietina or Plumularia falcata, round the 
stems of which it forms four or five volutions, and then 
projects forward in a straight, (or sometimes) undulating 
manner to the lengthof aninch. Var. With the volutions | 
reversed. Common on the coast of Scarborough. 
Serputa. Pxriacentuta.—Bean.—Shell _ strong, 
opaque, white, with three volutions, the outer one with 
a sharp keel-like ridge which is strongly wrinkled or 
serrated. Diameter, 4 lines. Varn With the volutions 
reversed. Found on the same Zoophytes with S. So- 
litaria and equally common. 
Natica Livipa.—Bean.—Shell smooth, globular, 
of a livid greenish colour, volutions five, marked with 
very fine longitudinal strize; aperture roundish-oval, 
outer lip thin, pillar lip white, a little spread and for- 
ming a small perforation behind it. Diameter 6 lines. 
M 
