SMITH : ON THE GENUS SCUTUS. 257 



Shells described as Pannophorus and Sadus but belonging 

 to other genera : — 



1835 — patelloideus Cantraine {Pannophorus) is a Tylodina. 

 1842 — intermedius Reeve {Pannophorus) is aTugalia. 

 1874— abnormis Nevill, is the dorsal plate of a Pholas.* 



I. Scutus anatinus Donovan. 

 a. Typical form. Shell elongate, narrow. 



Patella anatina Donovan. Rees' Encyclopedia, 1820, v., 

 Natural History Plates — Conchology, pi. xvi. 



Parmophorus elongatus Blainv. Bull. Sci. Soc. Philom., 

 1817, p. 25; Diet. Sci. Nat., xxxvii., p. 557; Malacol., 

 pi. 48, f. 2-2a. 



Eniarginula elongata Sow. Gen. rec. foss. Shells, f i. 



Scutus elongatus K. Ad. Sowerby's Thes., iii., pi. 248, f 1-2. 

 Sowerby's Con. Icon., xvii., pi. i, f. la-b. 



5. unguis A. Ad., part (non L.) Proc. Zool. Soc. 185 t, p. 221, 



Pannophorus australis Lam. An. s. Vert, ed. I., 1822, vL, 

 Part II., p. 5; ed. II., vii., p. 579. Cuvier's Re'gne 

 Anim., ed. Deshayes, pi. 65, f 1 — la. Chenu, Manuel 

 de Conch, i., p. 373, f. 2801. Reeve, Conch. Syst., pi. 

 139, f. 2-3. Hogg, Trans. Microscop. Soc. 1868, xvi., 

 pi 12, f. 57 (dentition). 



P. convexus Quoy and Gaim. Voy. Astrolabe, iii., p. 322, 

 pi. Ixix., f. 5-16. 



Scutus tumidus A. Ad. (non Quoy and Gaim.) P.Z.S., 185 1, 



p. 222 (part). 

 b. var. Shell proportionally broader. 



Patella unguis Schumacher, part (non L.) Syst. Vers. Test., 



pi, xxii, f. a — b. 



* This valve was described and figured by Walch in ' Der Naturforscher ' 

 1779, Stuck 30, p. Z6, pi. 3, f. 15, under the name of Scutum dacicum. 



J.C, ii., Sept., 1879. 1 1 



