SPAT HA 



1323 



Spat HA droueti Chaper. 



Shell somewhat elongated, trapezoidal, subinflated, subsolid, 

 inequilateral, beaks pointed but not high; posterior ridge 

 rounded, ending in a blunt point near the base of the shell; 

 anterior end narrowed, rounded ; dorsal outline curved ; base a 

 little incurved medially; dorsal slope obliquely truncate; sur- 

 face lightly, concentrically striate; epidermis brownish or 

 blackish, slightly wrinkled and showing traces of radial sculp- 

 ture ; hinge edentulous; muscle scars shallow; nacre lurid 

 greenish, somewhat iridescent. 



Length 69, height ^^y, diam. 24 mm. 



Assinie, Africa. 

 Spatha droucti Chapkr, Bull. Soc. Zool. Fr., X, 1885, p. 43, 



pi. I, figs. j-3. — Simpson, Syn., 1900, p. 897. 



A rather small species, of which two specimens from the 

 author are before me. It is considerably wider behind than in 

 front ; the base is incurved medially and full behind the mid- 

 dle ; the dark, subshining surface shows faint retriculation. 



Spatha martensi Sturany. 



"Shell large, ventral margin slightly incurved, posterior 

 margin obliquely descending and thus forming a beak, of which 

 the point is nearly on the line of the ventral margin. Epider- 

 mis dark brown ; nacre slightly rose-red. 



Length 137. height yy, diam. 21 mm. Beaks situated at near- 

 ly 2-y of the length." (von Martens). 



Type locality, stream falling into Lake Mctoria Nyanza. 

 Spatha martensi Sturany in Baumann, Durch Massai, 1894, 



p. T2, pi. XXV, fig. 39.— VON Martens. Besch., 1897, P- 244. 



— Simpson. Syn.. 1900, p. 897. 

 Spatha cailliandi var. martensi Germain, Arch. Zool. Exp. et 



Gen., (5), I, 1909, p. 55. 



The original description not being accessible, I have copied 

 that of von Martens, who remarks that "it appears to differ 

 from S. cailliandi only in the lower position of the beak." 



Germain. (1. c), considers it to be only a variety of cailHaudi. 



