Foraniinifera and Ostracoda. 187 



but the latter are made apparent by moistening the test. This 

 species is a frequent concomitant of mesozoic microzoa, and has 

 been found in the rhaetic of Somerset, and the neocomian of 

 Dorking, England ; also in the cretaceous of South Africa 

 (author's MS.). 



Ocairre7ice. — One specimen of medium size, Jurassic, Greenough 

 River district, West Australia. [2121. J 



Family Textulariidae. 



Sub-family Textulariinae. 



Genus Textularia, Defrance. 



Textularia crater, sp. nov. (PI. XXII., Figs. 2 and 2a). 



Specific characters. — Test very short, laterally slightly com- 

 pressed, and, therefore, sub-elliptical in cross-section. Aboral 

 end rounded. Oral surface depressed, the apertural margin 

 limbate. The margin of the last and penultimate chambers 

 somewhat square with the upper surface of the test. Chambers 

 few, obscurely seen on the surface of the shell, but the textularian 

 arrangement may be made out without much difficulty. Texture 

 finely arenaceous. Length of test, 0.14 mm. Greatest width, 

 0.3 mm. 



Affinities. — The short textularians with more or less limbate 

 sutures and apertural margin fall into the groups of T. trochus, 

 D'Orb., and T. conica, D'Orb.; according to their circular or sub- 

 elliptical outline in cross-section. Our specimen naturally falls 

 into the latter group, but may be distinguished from typical 

 forms of T. conica, by its rounded basin-shaped test and strongly 

 concave oral surface. 



Occurrence. — One specimen; Greenough River district. West 

 Australia. [2122.] 



Sub-f am ily Bulijiiininae. 



Genus Bulimina, D'Orbigny. 



Bulimina gregorii, sp. nov. (PL XXII., Figs. 3 and Za). 



Specific characters. — Test sub-rhomboidal, compressed, with 

 rounded lateral edges. Aboral end terminated by a blunt spike. 



