1340 SPATHA 



V'ar. pcrsiiiiiata (iermain. 



"Differs from the type by its general form being higher to- 

 wards the posterior region ; by its posterior region much more 

 sloping and terminating in a beak much shorter, decidedly con- 

 vex and placed very low ; by its ventral margin very much 

 more sinuous ; by its maximum diameter being nearer to the 

 dorsal margin ; by its stronger ligament, etc. Epidermis very 

 dark brown, almost black, deeply and extensively eroded in the 

 umbonal region, showing a lead-colored nacre ; lines of growth 

 more regular and stronger than in the type; nacre Prussian 

 blue, slightly iridescent. 



Length 74, height 39, of beaks 33, length of anterior region 

 24, of posterior region 52, diam. 29 mm." (Germain). 



Type locality, Le Mamoun, associated with the type. 

 Spat ha (Leptospatha) decorsei var. sinnata Germain, Bull. 



Mus. Hist. Nat., 1904, p. 469. 

 Spatha (Leptospatha) decorsei var.' pcrsinitata Germain, I'Af- 



rique Cent. Fr., 1907, p. 558, f\g. 93. 



"I have changed the name that I had previously given to 

 this variety because there is already a Spatha sinitata Martens 

 and the use of the same name might lead to confusion." 



Spatha subrkniformis (Sowerby). 



"Shell compressed, solid, thick, somewhat arched, oblong, 

 reticulated with close, concentric wrinkles and radiating striae, 

 brownish-green, white within, bluish towards the margin ; pos- 

 terior side angular, acuminated at the end ; dorsal margin 

 straight ; lateral margin obliquely convex, middle depressed ; 

 ventral margin arched ; anterior end rather short, with short 

 dorsal margin, umboes smooth, prominent. 



Length (of figure) 60, height 30 mm." (Sowerby). 



Type locality. Lake Nyassa. 

 Anodon subreniforuiis SovvERnv, Conch. Icon., XVII, 1867, pi. 



XIV, fig. 50. 

 Anodonta suhrcniformis P.^JTEl, Conch. Sam., Ill, 1890, p. 



185. 

 Spatha suhrcnifonnis Simpson, Syn., 1900, p. 900. 



