12 Phorcus lineatus

12 Phorcus lineatus

1: black exterior of snout.
2: mouth slit.
3: fringed, inhalent, left neck-lobe.
4: smooth-edged, exhalent, right neck-lobe fused to right eye-peduncle (5).
6: linear lobe protrudes from ventral surface of right neck-lobe.
7: medial dividing line on sole, "walks" by moving left and right sides alternately.
8: oblique transverse divisions on sole.
9: body greenish-yellow with fine brownish lines.
Shell height 16 mm, breadth 19 mm. April 2012. Weymouth, Dorset, England..