180 UMBRACULUM. 



vert., B. Asso., 1844, p. 134. REEVE, Conch. Icon., xi, pi. 1, f. 2. 

 CHENU, Manuel, i, p, 398, f. 3018, 3020. KUSTER, Conchyl. Cab., 

 p. 3, pi. 1, f. 1-4. (TRAY, P. Z. 8., 1856, p. 46 ; Figs. Moll. Anim., 

 iv, p. 33; ii, pi. 164, from DESHAYES in Cuvier's Regne Anim. 

 Moll., pi. 37. HIDALGO, Journ. de Conch., 1867, p. 423. WEIN- 

 KAUFF, Conch, des Mittelm., ii, p. 179. MOQUIN-TANDON, Ann. 

 Sci. Nat. (5), xiv, 1870, p. 121, pi. 21-28 (anatomy). FISCHER, 

 Journ. de Conch., 1883, p. 3. GRANGER, Moll, de France, p. 240, 

 pi. 18, f. 1. BUQ., DAUTZ. and DOLLF., Moll, du Rouss., i, p. 554, 

 pi. 65, f. 1, 2. VAYSSIERE, Rech. Zool., Opistobr., p. 134, pi. 6, f. 

 137-150 (anatomy). SMITH, P. Z. 8., 1890, p. 299. WATSON, 

 Chall. Rep. Gastrop., p. 674. HEYMONS, Zeitschr. fur Wissensch. 

 Zool., Ivi, p. 244, pll. 14-16 (Embryology). Umbella mediterranea 

 DELLE CHIAJE, Memoria, iv, pp. 200, 187, pi. 69, f. 5, 19, 20. 

 Patella umbellate DELLE CHIAGE, pi. 106, f. 26. 



Umbrella lamarckiana RECLUZ, Revue Zoologique, April., 1843, 

 p. 109. KUSTER, Conch. Cab., p. 4, pi. 1, f. 5, 6. 



7 Par mop hor us patelloideus CANTRAINE (see under Tylodina cit- 

 rina). 



The shell is more depressed than that of U. sinicum, with more 

 undulating edges and more conspicuously recurved apex. A small 

 individual is figured. 



U. SINICUM Gmelin. PI. 70, figs. 58, 59, 60; pi. 71, figs. 63, 64, 



65 ; pi. 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-scar (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 cm. 



Length 9, breadth 7'1, alt. 1'65 cm. (" aurantium "). 



Length 9, breadth 7*3, alt. 1-2 cm. (" aurantium"). 



Patella siniea GMEL., Syst. Nat. (13), p. 3705 (referring to very 

 characteristic figures in Davila and Martini). 



Patella umbellate GMEL., Syst. Nat. (13), p. 3720. 



