292 EET. E. B. WATSON ON THE 



Santo, 40 to 50 fms. One stained valve. — The locality 

 whence my specimen came is not a place where ballast is 

 thrown out, and the presence of the species in Mr. John- 

 son's collection, as also at the Canaries and Mogador, 

 compels me unwillingly to admit it as Madeiran. I do not 

 believe, bnt cannot disj)rove. 

 Mangelia, see Pleurotoma. 



161. Marginella guancTia, 1839, d'Orbigny, Moll. Canaries, p. 88, 



vi. 32-34. Huh. Canaries. ( Jn., W.) Prom the North 

 coast. — Me Andrew gives it as " frequent " in Madeira, but 

 his specimens, both in his best collection at Cambridge and 

 in that at the British Museum as well as those he sent me, 

 are all marked as from " Canaries." The solitary specimen 

 I got from Madeira was in sand from deep water on the 

 north coast ; probably, therefore, not a wanderer, but it 

 remains solitary. In Mr. Johnson's collection also only one 

 specimen presented itself. 



162. Marginella miliaria^ 1767, Linne (as Valuta), Syst. Nat. 



p. 1189 ; Sowerby, Thes. Conch, i. 399, Ixxviii. 227-230. 

 Sai. Prom Portugal to Mediterranean and Mogador. 

 (M., L., Jn., W.) Everywhere ; common. 

 M. Fhilippi (sic), a species given by Sen. Nobre as of Monterosato, 

 who says that it is the M. oninuta, Phil. Enum. ii. 197, xxvii. 23 (but 

 not of Pfeiifer), is one which I am quite unable to identify among any 

 I know as Madeiran. M. ccelata, which Monterosato gives in hia 

 ' Nomenclatura,' p. 139, as Madeiran from me, is a species I have been 

 accustomed to reckon as M. miliaria, L., differing only in colour. 

 Some confusion seems to exist here. 



163. Marginella secalina, 1844, Philippi, Enumeratio, li. 197, 



xii. 15 & sxviii. 19 ; Weinkauff, Conch.-Cab. ed. 2, Y. 

 pt. 4, p. 29, iv. 21-23. Hah. Mediterranean to Canaries 

 {teste McAndrew's List corrected propria manu and his 

 specimens in the Cambridge Museum). (L., Jn., "W.) 

 Prom Punclial to Punta de Sao Lourengo. Plentiful. 



164. Mathilda quadricarinata, 1814i*, Brocchi (as Turbo), Conch. 



Poss. p. 375, vii. 6 ; Kobelt, Jahrb. i. 226, xi. 2. Hab. 

 Western Mediterranean and St. Helena. (W.) Punchal, 

 Punta de Sao Lourengo, and Porto Santo. Not rare. 

 Megathyris, see Argiope. 



* A five years' priority over the Mathilda of Semper has been claimed for 

 the name Cingulina of Adams, but no sinistral-tipped shell can pass under 

 Adams's definition. See ' Challenger ' Gasteropoda, p. 499. 



