18G EEV. E. T. Lowe's list of suells 



80. Bucointcm vittatvm, 1j.= Tereh-a vittata, Lam. 



82. This is Conns franciscanus, Brug., which, according to Des- 

 bayes (Lam. ed. 2. xi. 81)= a worn G. mediterraneus. 



83. Cymlium rii,higinosum (Swains.). Mainly characterized as 

 a species by its strong, solid, substantial thickish shell, oblong 

 shape, narrow sutural channel, rich chestnut or tawny-brown 

 glaze, and distinct well-marked or developed inner lip. There are 

 two tolerably permanent and distinguishable forms or varieties, 

 viz. a, angulata, with the shoulder angular or slightly pointed, 

 and /3, incurva, with the shoulder rounded and incurved. Of 

 these, a includes the shell originally figured by Swainson in his 

 ' Exotic Conchology,' under the name of Valuta ruliginosa, and 

 those delineated and described by Sowerby under that of Cymba 

 onibiginosa. The only representations 1 can safely quote of /3 are 

 Buonan. 3. f. 2, and Adanson's Fhilin, t. 3. f. 2. 



Mogador has furnished a single small adult example of each of 

 these two forms. That of a is, however, so aberrant, that it was 

 pronounced by one of oixr most experienced practical concholo- 

 gists to be new and undescribed. It will be advisable, therefore, 

 to enter into some detail with regard to both varieties, first laying 

 down the normal characters and synonyms of each. 



a. angulata ; shoulder or top of outer lip angular or a Little 

 pointed, not inflexed ; sutural groove sometimes a little broad and 

 open, with the edge erect or subreflexed, and rising mostly above 

 the mammillary cone or spire ; shape occasionally slightly ventri- 

 cose, with the aperture subeffuse and outer lip expanded and sub- 

 arcuated downwards. — Cyinba ruhiginosa, Sowerb. sp. Conch. 6. 

 ff. 7 a, 1), c, d. Voluta ruhiginosa, Swains. Exot. Conch. ; Martini, 

 t. 70, f. 765. 



Of these representations, Sowerby' s if. 7 e, d, approach nearest 

 towards a correct delineation of my single Mogadorian example ; 

 Swainson' s figure, like some of the others, differing in the more 

 produced spire with its apex rising considerably above the edges 

 of the sutural groove ; and all being of a more regularly oblong 

 shape, with the outer lip straight, and aperture not at all efi'use. 

 The Mogadorian shell is moreover only 4 inches long and 2 inches 

 3 lines -R-ide, thus being little more than half the size of Sowerby's 

 ff. 7 c,d; and tliough the aperture is even more efi'use and the outer 

 lip more expanded than in these figures, and the spire or mammillary 

 cone as much sunk or concealed below the sutural keel, the 

 shoulder is simply angular at the top of the outer lip, without any 

 short erect point. The surface is sprinkled all over, as in C. jrro- 



