^o DISCOVERY REPORTS 



Family MARGINELLIDAE 



Genus Marginella Lamarck, 1799 



Type (monotypy): Volut a glabella Linn. 



Marginella warrenii Marrat, PI. X, fig. 67. 



Marginella warrenii Marrat, 1876, p. 136. 



Marginella warrenii Tryon, 1883, p. 56. 



Marginella hahni Mabille, 1884, p. 132. 



Marginella hahni Rochebrune & Mabille, 1889, p. H 51, pi. 3, fig. 3a, b. 



Marginella warrenii Tomlin, 1917, p. 305. 



Type localities. Between Falkland Is. and Strait of Magellan, '5o°23'5"N, 64 o' 4" W 

 (N cited in error for S latitude) {warrenii); between Strait of Magellan and Falkland Is. in 120m. 

 {hahni). 



St. WS 88. Off Le Maire Strait, Tierra del Fuego, 54° 00' 00" S, 64 57' 30" W, 6 Apr. 1927, 118 m. 



St. WS 212. North of Falkland Is., 49 22' 00" S, 6o° 10' 00" W, 30 May 1928, 242-249 m. 



St. WS 213. North of Falkland Is., 49 22' 00" S, 6o° 10' 00" W, 30 May, 1928, 249-239 m. 



St. WS 216. North of Falkland Is., 47 37' 00" S, 6o° 50' 00" W, 1 June 1928, 219-133 m. 



St. WS 228. North-east of Falkland Is., 50 50' 00" S, 56 58' 00" W, 30 June 1928, 229-236 m. 



St. WS 237. North of Falkland Is., 46 00' 00" S, 6o° 05' 00" W, 7 July 1928, 150-256 m. 



St. WS 244. North-west of Falkland Is., 52 00' 00" S, 62° 40' 00" W, 18 July 1928, 253-247 m. 



St. WS 245. West of Falkland Is., 52 36' 00" S, 63 40' 00" W, 18 July 1928, 304-290 m. 



St. WS 816. West of Falkland Is., 52 09' 45" S, 64 56' 00" W, 14 Jan. 1932, 150 m. 



St. WS 820. North-east of West Falkland Is., 52 53' 15" S, 6i° 51' 30" W, 18 Jan, 1932, 351-367 m - 



St. WS 867. Between Falkland Is. and Patagonia, 51 10' S, 64 15-5' W, 30 Mar. 1932, 150-147 m. 



Range. Falkland Is. to Patagonia and Tierra del Fuego, 118-367 m. 



Dentition. A number of examples were dissected but no radula was located. 



This is a handsome shell over 20 mm. in height, highly glazed and white with two equally broad 

 flesh-coloured spiral bands. By an initial error the locality was given as north instead of south latitude, 

 which credited the species to eastern Canadian waters until the error was discovered by Bavay (see 

 Tomlin, loc. cit. p. 305). 



Marginella dozei Rochebrune & Mabille, PI. X, fig. 66 



Marginella dozei Rochebrune & Mabille, 1889, p. H 52, pi. 3, fig. \a, b. 

 Type locality. Between Strait of Magellan and Falkland Is. in 120 m. 



St. 388. Between Cape Horn and Tierra del Fuego, 56° 19J' S, 67 09!' W, 16 Apr. 1930, 121 m. 

 A similar species to zvarrenii but smaller and with a different colour pattern. There are two spiral 

 colour bands, the upper one being narrow and submargining the suture and the lower one occupying 

 most of the base. 



Large, highly glazed Marginellids are usually of tropical occurrence. 



Family VOLUTIDAE 



Genus Adelomelon Dall, 1906 



Type (o.d.) : Volata ancilla Solander 



The vexed question of the type designation of Swainson's Cymbiola was dealt with in detail by 



Marwick (1926, pp. 263, 264). This requires pointing out, for Thiele (1931, p. 350) has persisted in the 



old interpretation of ancilla Solander as type of Swainson's Cymbiola. The actual genotype of Cymbiola 



