History of British animals - University of Guam Marine Laboratory

Goodalia. MOLLUSCA. MACTRAD^E. 4294. M. cuneata— Ovate, smooth, depressed towards the front, anteriormargin acute-angular.— Sower. Min. Conch, t. clx. f. 7-—In Crag.Gen. CXIII. GOODALLIA.— Shell triangular, equivalveinequilateral, closed ;hinge with two teeth in one valve,and a triangular cavity between them ; in the other valvea singletooth ;a lateral simple tooth in each valve on theproduced side.453. G. triangularis.— Shell with the inner margin toothed.Mactra tri. Mont. Test. Brit. 99. t. iii. f. 5.—G. tri. Turt. Biv. Brit. 77.t. vi. f. 14.— English and Irish coasts.Length 2 lines, hreadth 3 lines ; strong opake, smooth, white ; heats prominent,ohtuse.454. G. minutissima.— Shell with the inner margin plain.Mactra min. Mont. Test. Brit. Sup. 37—G. min. Turt. Biv. Brit. 77-t. vi. f. 15 Coast of Devon and Cornwall.This species resembles the preceding, but the shell is not quite so angulated,nor so long in proportion to its hreadth ; nor has it ever occurred solarge.Gen. CXIV. LEPTON.— Shell flat, nearly orbicular, equivalveinequilateral, a little open at the sides ;hinge ofone valve with a single tooth and a transverse linear lateralone on each side of the other valve ; with a cavityin themiddle, and a transverse, deeply cloven, lateral tooth oneach side, the segments of which divaricate from thebeak.— 455. L. squamosum.— Shell puncturedin a scale-like manner.Solen squam. Mont. Test. Brit. 565.—-L. squam. Turt. Biv. Brit. 62. t. vi,f. 1, 2, 3.Length -j^ths, breadth T s 3 ths of an inch ; pellucid, thin, white ; obscurelywrinkled concentrically ;beak small, pointed ;inside with very fine longitudinalstrise radiating from the hinge.456. L. nitidum.— Shell glossy, slightlystriate transversely.Turt. Biv. Brit. 63.. ..From corallines, in Torbay.Shell half the size of the last, which it resembles in shape and hinge, butis of a lucid, pale, glossy horn-colour, without punctures.