V. testâ sub-ovali, convexiusculâ, creberrimè cancellatâ, sub-fuscâ, intus albidâ; lunulâ cordatâ; long. 2⅝; lat. 3; poll.
Obs. in junioribus, striis transversis concentricis elevatis, acutis.
Habitat ad littora occidentalia Patagoniæ (Gulf of Peñas and its vicinity). Mus. Brit., nost., Brod.
12. Arca angulata.
A. testâ transversâ, subcordato-quadratâ, intus fusco-violascente; latere antico producto, elevato, undulatim lamellato, postico rotundato; umbonibus valdè remotis, areâ cardinali maximâ, striatâ; margine hiante; long. 1⅛; lat. 1⅞; poll.
Habitat ad Juan Fernandez. Mus. nost.
This shell was dredged up from 80 fathoms water in the offing of Cumberland Bay, at Juan Fernandez; it was attached to a branch of coral.
The hinge is broad and smooth, with distinct markings; the gape is rather wide, and the anterior part of the shell rises rather elegantly, like the stern of some Indian canoes, and in all the specimens but one, terminates in a point. The one above
described has a rounded form; the bows or front being rather elegantly and finely lamellated in a wavy form; the colour of the hinge is red, and the inside is generally of a brownish purple; in some it has a more yellow tinge.