Narrative of the surveying voyages of his majesty's ships Adventure and Beagle (vol.1): between the years 1826 and 1836 : describing their examination of the southern shores of South America, and the Beagles's circumnavigation of the globe

548 CATALOGUE — SHELLS. valuable article of food to the ship's company, particularly during the winter months, when sea-birds and game were not to be pro- cured, and the fish had deserted us. I have named it, in allusion to its affording us a grateful, as well as seasonable, supply of fresh food. 8. Erycina Solknoides. E. testd subellipticd, transversim crebcrrime siibstriatd, albidd, epi- dermide fusco-grised ; long. 1 pauh minus ; hit. 2 ; poll. Habitat infreto Magellanico (sandy mud flats of Port Famine). Mus. Brit., nost., Brod. 9. Tellinides rosacka. T. testd subtrigond, planulatd, striis concentricis creberrimis ; long. ^; lat. l-^g-, poll. Habitat ad littora BrasilicE (Santos). Mus. nost. 10. Venus inflata. V. testd rottmdatd, concentrice substriatd, albente, intus albd, lunuld obsoletd; lo7ig. 1^^^; lat. If; pa//. Habitat infreto Magellanico ( Port Famine). Mus. nost. 11. Venus antiqua. V. testd sub-ovali, convexiusculd, creberrime cancellatd, sub-Juscd, intus albidd ; lunuld cordatd ; long. 2f ; lat. 3 ; poll. Obs. in Junioribus, striis transversis concentricis elevatis, acutis. Habitat ad littora occidentalia Patagonice (Gulf of Penas and its vicinity). Mtis. Brit., nost., Brod. 12. Arca angulata. A. testd tra?isversd, subcordato-quadratd, intus fusco-violascente; latere antico producto, elevato, undulatim lamellato, postico rotun- dato; umbonibus valde remotis, ared cardinali maximd, striatd; margine hiante; long, l^j lat. 1§; 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