JETHERIIDjE. 197 



Family 



Subfamily 



Shell irregular, free or attached, covered with a periostracurn, 

 interiorly nacreous or subnacreous ; hinge edentulate ; ligament 

 linnear, subinternal ; sometimes with two adductor scars on the 

 valves, sometimes with only the posterior ; pallial line entire. 



Animal fluviatile ; mantle open ; branchial orifice communi- 

 cating with the pedal orifice ; anal orifice closed ; foot absent ; 

 palpes large, semi-ovate ; gills unequal, folded, uniting behind 

 together with the visceral sac and the mantle. 



Distribution. Tropical Africa; S. India: United States of 

 Colombia. 



Genus MULLERIA. 



Mulleria, Ferussac, Mem. Soc. Hist. Nat. Paris, 1824, i, part 2 7 

 pp. 368-369 ; Sowerby, Conch. Icon, xviii, 1872. 



TYPE, Mulleria lobata, Ferussac, from the U.S. of Colombia. 



Range. United States of Colombia and Southern India. 



Translation of original description : Shell attached, inequi- 

 valve, irregular [in form] ; valves joined by an exterior ligament, 

 short, lateral, and by a sinuous hinge furnished with oblique 

 fossettes, in which are enclosed corresponding projections, both 

 being ornamented with a ligamental appendage. 



323. Mulleria dalyi, Smith. 



Mulleria dalyi, Smith, Proc. Malac. Soc. iii, 1898, p. 14, figs, in 

 text ; Woodward [Anatomy], torn. cit. p. 87, figs, in text. 



Original description : Testa irregulariter quadrata, sed postice 

 producta et rotundata, compressa, insequivalvis ; valvae mediocriter 

 crassa3, intus margaritaceaB, iridescentes, olivaceo plus minus 

 maculataB et ad marginem olivaceo-fusco limbata}, extus sub perio- 

 straco subfibroso, nigro-fusco, fortiter concentrice striato, ex 

 laminis albis calcareis et aliis corneis fuscescentibus constitse; 

 valva adhaerens irregulariter planata, altera convexior, plus minus 

 erosa ; cicatrix musculi posterioris magna, elongata vel rotundata, 

 mediocriter profunda, concentrice et radiatim striata ; linea pallii 

 irregularis, punctata, ad marginem superior! fere attingens ; margo 

 dorsi rectus, ligamento valido per totam longitudinem instructus. 



Long. 52, lat. 65, diarn. 20 mm. 



Hob. Kadur District, Mysore. 



After comparing it witlTthe S. American species of the genus 



the author makes the following remarks " the nacre 



exhibits an iridescent mixture of white, bluish, greenish, olive and 

 pinkish tints, whilst the margin is olive-brown. The exterior, 

 also, is of a rich deep brown or blackish-brown "' 



