Sl'ATlIA 1 33 1 



Spatha anceyi Roi'rguignat, Mem. Soc. Zool. Fr., VII, 1894, 



p. 231, fig-. 7. 

 Spatha lacustris vSimpson, Syn., 1900, p. 898. — Germain, 



I'Afriqiie Cent. Fr., 1907, p. 564; Arch. Zool. Exp. et Gen.. 



(5), I, 1909, p. 57. 



Appears to be close to S. kirki, but is more elongated and 

 not so pointed behind. It is rather wider in front than that 

 species. Changed from S. anceyi, as there is another species 

 with that name. 



Germain, (1. c), considers this to be a form of S. bourgitig- 

 fiati. 



vSpatha nyassaensis Lea. 



Shell obovate, compressed, rather solid, inequilateral ; beaks 

 low, pointed with faint, broken, concentric sculpture; posterior 

 ridge low, narrowly rounded, ending below the median line ; 

 anterior end narrowed, rounded ; dorsal and basal lines lightly 

 curved, the latter full behind the middle ; posterior slope ob- 

 liquely subtruncate ; surface with low, irregular, concentric 

 sculpture ; epidermis dark tawny ; nacre tlesh-colored ; muscle 

 scars impressed. 



Length 53, height 31, diam. 13.5 mm. 



Lake Nyassa. 

 Spatha nyassaensis Lea, Pr. Ac. N. Sci. Phila.. \^III, 1864, p. 



109; Jl. Ac. N. Sci. Phila., VI, 1866, p. 36, pi. xiii, fig. ^^i 



Ob., XI, 1867, P- 40. pi. XIII, fig. 33.— PClessin, Conch. 



Cab. Ano., 1876, p. 190, pi. lxii, figs. 3, 4.— Simpson, Syn., 



1900, p. 898. 

 Ptatiris f Spatha) nyassaensis Lea, Syn., 1870, p. 89. 

 Spathelia nyassaensis Ancey, Bull. Soc. Zool. Fr., VI, 1894, 



p. 228. 



Spatha nyassana Bourguignat, Bull. Soc. Mai. Fr.. VI 1889 



p. 38. 



I have before me the type and a young specimen of this 

 species. Its compressed form and pale epidermis will distin- 

 guish it from related species. 



