180 UMBRACULUM. 
vert., B. Asso., 1844, p. 134.—RerEve, Conch. Icon., xi, pl. 1, f. 2.— 
CHENU, Manuel, i, p, 398, f. 83018, 3020—KusreEr, Conchyl. Cab.,. 
p. 8, pl. 1, f. 1-4.—-Gray, P. Z. S., 1856, p. 46; Figs. Moll. Anim., 
iv, p. 33; ii, pl. 164, from DesHayes in Cuvier’s Regne Anim. 
Moll., pl. 837.—Hrpateo, Journ. de Conch., 1867, p. 423.—We1n- 
KAUFF, Conch. des Mittelm., ii, p. 179.—Moqu1n—Tanpon, Ann. 
Sci. Nat. (5), xiv, 1870, p. 121, pl. 21-28 (anatomy ).—FIscHer, 
Journ. de Conch., 1883, p. 3—GRANGER, Moll. de France, p. 240, 
pl. 18, f. 1—Bueg., Daurz. and Douir., Moll. du Rouss., i, p. 554, 
pl. 65, f. 1, 2—VayssiERE, Rech. Zool., Opistobr., p. 134, pl. 6, f. 
137-150 (anatomy).—Smirn, P. Z. S., 1890, p. 299—Warson, 
Chall. Rep. Gastrop., p. 674.—HrEymons, Zeitschr. ftir Wissensch. 
Zool., lvi, p. 244, pll. 14-16 (Embryology).— Umbella mediterranea 
DELLE CuraJE, Memoria, iv, pp. 200, 187, pl. 69, f. 5, 19, 20.— 
Patella umbellata DELLE CuraAGeE, pl. 106, f. 26. 
Umbrella lamarckiana Reciuz, Revue Zoologique, April., 1848, 
p. 109.—Kusrer, Conch. Cab., p. 4, pl. 1, f. 5, 6. 
? Parmophorus patelloideus CANTRAINE (see under Tylodina cit- 
rind). 
The shell is more depressed than that of U. sinicwm, with more 
undulating edges and more conspicuously recurved apex. A small 
individual is figured. 
U. stnicum Gmelin. PI. 70, figs. 58, 59, 60; pl. 71, figs. 63, 64, 
65; pl. 72, figs. 70, 71. 
Shell large, oval, inequilateral, depressed. White under a thin 
straw-colored cuticle, which is lamellose and brownish toward the 
periphery. Vertex a small conical yellow boss, behind the middle 
and decidedly nearer the left side, apex recurved. Disk with 
growth-lines and numerous very low, unequal radial waves, the mar- 
gin but slightly undulating. Interior brown and conspicuously 
radially striate inside the muscle-sear (or in the form from Sandwich 
Is., orange-brown within muscle-scar, with a yellow halo); white 
toward the edge. 
Length 8°8, breadth 7, alt. 1-1 cm. 
Length 10, breadth 8:5, alt. 1°15 em. 
Length 9, breadth 7:1, alt. 1:65 em. (“ aurantium”’). 
Length 9, breadth 7:3, alt. 1-2 cm. (“‘aurantium”’). 
Patella sinica GMEL., Syst. Nat. (13), p. 3705 (referring to very 
characteristic figures in Davila and Martini). 
Patella wumbellata GMEL., Syst. Nat. (13), p. 3720. 
