MUTKI.A 1 36 1 



Mntelma inabilli Rochebkune, Bull. vSoc. Mai. Fr., Ill, 1886, 



p. 7. — Simpson, Syn., 1900, p. 906. 

 Mutelina mabillei Germain, I'Afrique Cent. Fr., 1907, p. 569. 

 Mwtelina paludicola Rochkbrune, Bull. Soc. Mai. Fr., Ill, 



1886, p. 8. — Simpson, Syn., 1900, p. 906. 



Var. frasi (Germain). 



"Shell very much longer; dorsal and ventral margins more 

 divergent; posterior region more developed, terminating in a 

 subtruncate, rounded beak, placed very low. Shell quite thick, 

 solid, epidemiis brown-chestnut, slightly reddish posteriorly, 

 greenish towards the beaks, which are much eroded; lines of 

 growth strong and irregular ; nacre blue, quite iridescent. 



Length 63, height 24, diam. 13 mm." (Germain). 



Type locality. The Niger. 

 Mutelina mabillei var. frasi Germain, Bull. Mus. Hist. Nat., 



1907, p. 67: I'Afrique Cent. Fr., 1909, p. 580, fig. 97. 



Var. gailliardi (Germain). 



■"Shell of medium size, narrowly elongate, slightly siliqui- 

 form, quite compressed ; valves decidedly gaping in front and 

 very much so behind ; dorsal and ventral margins nearly par- 

 allel ; dorsal margin straight ; ventral margin nearly straight, 

 slightly sinuous in the middle ; antero-dorsal angle acute ; an- 

 terior region very short, subcorneal, rounded, decidedly cut 

 away at the base; posterior region very long, four times as 

 long as the anterior, terminating in a beak obliquely truncate 

 and rounded ; beaks small, not prominent, incurved, eroded ; 

 dorsal ridge very blunt; ligament 31 mm. long, not prominent, 

 brownish ; hinge filiform ; anterior muscular impressions deep ; 

 posterior quite deep ; pallial line very strongly marked. 



Shell quite solid; epidermis yellowish, passing into a deep 

 brown anteriorly and slightly grayish towards the beaks ; lines 

 of growth irregular, sharp, much stronger and slightly lamel- 

 lose posteriorly ; nacre bluish, slightly rosy towards the beaks, 

 verv iridescent. 



