Shell orbicular, nearly trochi-form, white with two pale-brown bands on each whorl; the one near the suture narrow, and the other, placed on the middle of the whorl, broad; whorls five; convex rounded, with numerous close concentric furrows; axis umbilicated; umbilicus rather narrow, deep; aperture rather more than one half the length of the shell; peristome (not formed ?) simple.
99. Chiton rugosus (n.s.)
Testa octovalvis glabra, valvis tuberculatis, ligamento glabro laevi.
Icon. --
Shell with eight valves, bald; valves covered with numerous small tubercles both on the central and lateral area; marginal ligament smooth, bald.
100. Patella tramoserica, Chemn. 11 179.
Icon. Chemn. 11 t. 197. f. 1912, 1913.
101. Patella radiata, Chemn. 11 100.
Icon. Chemn. 11 t. 197. f. 1916, 1917.
When young, the form of this shell is more conical than in the figure above quoted, and the outer surface is finely radiately striated.
102. Patella neglecta (n.)
Patella melanogramma, Sowerby, not Gmel.
Icon. Sow. Gen. f.
When this shell is young, or when the older specimens have lived in deep water, where their surface has not been broken by the shingle, or corroded, or covered with coralloid incrustations, they are regularly radiately ribbed; the ribs are covered with narrow intermediate grooves, marked with a black spot on the internal edge of the shell, which is permanent through all the variations of the outer surface. The inside is pale purplish-brown, with a yellowish-white muscular impression. In the older specimens the central disk is often of a pure opaque-white, and the muscular impressions round the inner edge of the shell are both pellucid brownish-white; length four inches, breadth three, height two inches.
This shell is abundant on the rocky shores of King George the Third's Sound.