Synopsis of the British Recent Foraminifera. Bij S. B. Brady. 927 



Postscript. — Since tlie foregoing Synopsis has been in type I have 

 received from my friend M. Schlumberger a copy of a valuable communi- 

 cation, recently made by him to the Zoological Society of France, on 

 the genus Flanisinrina (Bull. Soc. Zool. France, vol. xii. pp. 105-118, 

 pi. vii.), containing a further instalment of his interesting researches 

 on the construction of the test in the various types of Miliolidse. 

 M. Schlumberger's examination of the forms referred to the genus 

 Flanispirina in the ' Challenger Eeport ' has led him to the conclusion 

 that they exemplify two diverse types of structure sufficiently distinct 

 for generic separation, — one group, for which the term Planisjnrina is 

 retained, embracing PI. (Bilocidina) contraria, d'Orb., PI. communis, 

 Seg., and PI. carinata, Seg. (and, I suppose, PI. exigua, Brady) ; the 

 other, for which the generic name SigmoUina is proposed, including 

 Planisinrina sigmoidea, Brady, PI. (Spiroloeulina) celata, Costa, and 

 a new species SigmoUina edwardsi, Schlumberger, together with 

 Quinquelocidina secans, d'Orb,, and Quinquelocidina tenuis, Czjzek. 



It is not needful here to discuss the relative value of the characters 

 upon which this arrangement is founded. The construction of the test 

 in the species concerned has been worked out with the author's accus- 

 tomed skill and accuracy, and so far as can be judged the results bear out 

 the conclusions at which he has arrived. That the difficulties referred to 

 on a previous page, as to the position of apparently intermediate forms, 

 like Quinquelocidina tenuis and Q. secans, are thereby disposed of, is an 

 additional argument in favour of the suggested relationship. 



The acceptance of this view would only affect the nomenclature 

 of the present paper in connection with three species, namely, — 

 Planispirina celata, Miliolina secans, and Miliolina tenuis, which 

 would stand respectively as Sigmoilina celata, Costa, sp., Sigmoilina 

 secans, d'Orb., sp., and Sigmoilina tenuis, Czjzek, sp. 



3 p 2 



