584 MESSES. E. HEEON-ALLEN AND A. EAELAND ON THE 



90. Massilina alveoliniformis Millett. (Pi. XLV. fig. 15.) 



Massilina alveoliniformis Millett, 1898, etc., FM. 1898, p. 609, pi. xiii. figs. 5-7. 

 2 Stations. 



A single young specimen, resembling Millett's fig. 6, at Stn. 6, and another at 

 Stn. %A. The shell is rather more coarsely agglutinate than in the Malay types, which 

 are now in our collection and are composed of very fine sand-grains. 



Fornasini (F. 1905, SOM. p. 65, pi. iii. figs. 6, 7) figures his usual reproductions 

 of d'Orbigny's original outlines of the species Quingueloculina variabilis, made for the 

 " Planche inedite " (which latter, however, was not finished by him). These represent 

 a quinqueloculine form, which Fornasini refers to M. alveoliniformis Brady, and a 

 spiroloculine form which he refers to 8])iroloGulina arenaria Brady. He suggests that 

 the former is a young stage of the latter, and thus by his suggestion of bimorphism 

 properly relegates the species to the genus Massilina. If Fornasini's view is correct, 

 d'Orbigny's species Q. variabilis probably represented Millett's M. alveoliniformis, 

 and its tropical habitat [Mer 8ud et Rawack) would bear out this identification, but the 

 type-specimens which we have inspected at La Eochelle and in Paris are so damaged 

 as to be useless for purposes of identification. The Paris fragment suggests a Spiro- 

 loculina or Planispirina. It seems desirable, therefore, that Millett's name should 

 be perpetuated and d'Orbigny's definitely abandoned. 



Subgenus Sigmoilina Schlumberger. 



■ 91. Sigmoilina OVata Sidebottom. (Pi. XLV. figs. 16-18.) 



Sigmoilina ovata Sidebottom, 1904, etc., EFD. 1904, p. 6, pi. ii. figs. 12, 13, text-fig. 1. 

 (See B. 1887, SERF. Postscript, p. 927.) 



9 Stations. 



Generally distributed and often very abundant. The specimens are, as a rule, large 

 and well developed, but at Stns. 8 and I A (at the latter of which it was very common) 

 the individuals were of a very small and starved type. The species is very closely 

 related to the S. edwardsi of Schlumberger, from which, however, it difi"ers in its more 

 cylindrical contour and lesser number of chambers visible externally. S. ovata has 

 normally five visible chambers, S. edivardsi having seven. 



92. Sigmoilina edwardsi (Schlumberger). (PL XLV. figs. 19-21.) 

 Planispirina {Sigmoilina) edwardsi Schlumberger, 1887, P. p. 483 (113*), text-fig. 8, pi. vii. 

 figs. 15-18. 



. * This is correct (fide Sherborii), but it is the page in the series of reprints issued by Schlumberger, which 

 ■were repaginated consecutively as the various articles appeared, and has introduced terrible confusion into 

 all references to his work. 



