﻿204 rSEUnOSl'ATIIA 



Burtonia laxi'^erina Udukc.uignat, Un. and ir. Tan., 1886, p. 



36; Icon. Mai. Tan., 1888, pi. xxiv, figs. 1-4. 

 Burtonia magnipica Boukguignat, Un. and Ir. Tan., 1886, p. 



41 ; Icon. Mai. Tan., 1888, pi. xxvi, figs. 1-2. 

 Burtonia jouberti Rourguignat. Un. and Ir. Tan., 1886, p. 40. 

 — Grrmain, Moll. L. Tan., 1908, p. 685, figs. 37, 38. — Simp- 

 son, Syn., 1900, p. 578. 

 Burtonia foai Mabiu.e. Bull. Soc. Philom.. HI, 1901, p. 58. — 

 Germain, Moll. L. Tan., 1908, p. 685. figs. 39, 40. 

 The line between the valves is not exactly straight, and 

 sometimes the posterior point is turnefl first to one side and 

 then to the other. I am inclined to believe that the shells of 

 this species are dimorphic and that I'onrguignat's Burtonid 

 moineti, in which the posterior base is not inflated, is the male 

 of this species, though it is possible that it may be distinct. 

 The posterior slope shows slight traces of plication. 



Pseudospatha carrei (Putzeys). 



Shell elongated, inequilateral, compressed, with a nearly 

 straight dorsal line ; anterior end rounded, meeting the dorsal 

 line at an obtuse angle ; posterior end truncate above the base 

 line, sweeping around from this truncation to the upper an- 

 terior point in a long curve; beaks minute, slightly elevated 

 above the dorsal line ; ])Osterior ridge low but apparently well 

 marked, ending behind in a rounded point on the median line : 

 surface slightlv concentrically rugose; ei>idermis fuscous-oli- 

 vaceous, green at the umbonal region ; nacre bluish, pearly and 

 iridescent. 



Length y2, height 2.}., diam. 12.5 mm. 



Stanley Pool, Leopoldville, Congo. 

 Burtonia carrei P^utzkys, Proc. \'erb. Soc. Mai. Belg., 1898, 



p. XXVIII, fig. 16. 

 Mutelina carrei Germain, Arch. Zool. Kxp. et Gen.. (5), I, 



1909, p. 58. 

 Pseudospatha Icopold: illeiisis Simtsox, Syn., 1900. p. S77- 



