13 18 SPATIIA 



Spaflia nibivis caiHiaitdi (part). Simpson. Syn., 1900, p. 896. 

 Germain, (1. c), considers this a valid species, which differs 

 "very distinctly" from 5. rubens. In deference to his opinion, 

 I have copied the original description. 



Spatha Bi'ixAMvi Jousseaume. 



"Shell solid, heavy, black, oblong oval, depressed, equi- 

 valve, inequilateral, distantly and concentrically striate ; de- 

 pressed and rounded in front, depressed and acuminate behind ; 

 umbones not prominent, eroded ; dorsal margin curved, gib- 

 bous ; ventral rather rounded, constricted in the middle ; hinge 

 sinuous, edentulous ; nacre pearly-while. 



Length no, height yy, diam. 33 mm." (Jousseaume). 



Type locality, The Niger at Koulikono. 

 S/^atha hellamyi Jousseaume, Bull. Soc. Zool. Fr., XI, 1886, 



p. 491, pi. xiTi, fig. 2, 2a. — Germain, Arch. Zool. Exp. et 



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

 Spatha rubens cailliaudi (part). Simpson, Syn., 1900, p. 896. 



Germain, (1. c). having accorded specific rank to this form, 

 1 repeat the original description. 



vSpatha corneola Rochebrune. 



• "Shell subtetragonal, solid, broadly rounded in front, subdi- 

 lated and slightly sinuous behind, deeply, concentrically sul- 

 cate, sulci becoming lamellose and unequal at the extremities ; 

 dorsal margin slightly incurved ; ventral margin concave ; um- 

 bones not prominent, deeply eroded, coppery ; epidermis brown, 

 corneous, shining ; nacre pale red, livid, with a marginal band 

 iridescent with rose and blue. 



Length 96, height in front 42, in the centre 51, behind 50, 

 diam. 36 mm." (Rochebrune). 



Type locality. Mokaka, Congo. 

 Spatha corneola Rociieprune, Bull. Soc. Mai. Fr., Ill, 1886, 



p. 9. — Simpson, Syn., 1900, p. 902. 

 Spatha ganciniensis Rochebrune, Bull. Soc. Mai. Fr., III. 



t886, p. 9. — Germain. Arch. Zool. Exp. and Gen., (5), I, 



1909, p. 55. 

 Spatha gancinenis Simpson, Syn., 1900, p. 902. 



Germain, (I. c), unites these two forms under the name of 

 ganciniensis, but corneola has precedence. 



