Illustrated Index of British Shells / Containing figures of all the recent species

by G. B. Sowerby

Nucula, Linn.

Fig.

01. N. nucleus, Linn. (Arca.)—N. margaritacea, Glycimeris argentea.—Brit. co. generally, 7 to 90 fath., C. Thick, obtuse; beaks terminal.

02. N. decussata, Sowerby.—N. sulcata, N. Polii.—Hebrides, Loch Fyne, Dublin Bay, 30 to 50 fath., Mr. Large, striated; beak not terminal.

03. N. radiata, Hanley.—N. and Arca nucleus and radiata.—Torbay, Milford Haven, Arran, etc., 10 to 70 fath., Mc. Prolonged anteriorly, rayed.

04. N. nitida, Sowerby.—N. nucleus, var.—Numerous British loc., 1 to 35 fath., C. Shining, ends rather pointed.

05. N. tenuis, Montagu, (Arca.)—North British co., 40 to 100 fath., sand, C. Thin, inner edge not crenated; beak terminal.

Leda, Schum. Beaked behind.

06. L. caudata, Donovan, (Arca.)—Arca and Nucula minuta and rostrata.—North co., C.; south co., R. 10 fath. to deep water. Ridged.

07. L. pygmæa, Munster, (Nucula.)—N. and L. tenuis, gibbosa, and lenticula.—Skye, Hebrides, Croulin Isl., 25 to 50 fath. Minute, smooth. Size (omitted) one-fifth of an inch.