8 PKOCEEDINGS OF THE ]SrATIO][SrAL MUSEUM vol.72 



(Czjzek) both of which are from the Miocene of Austria, Plate 3, 

 Figures 4 a-c show a specimen from the Miocene of Kostej in the 

 Banat region of Hungary which has the characters of this species. 

 The much-curA^ed dorsal sutures with the fimbriate border and the 

 well-developed neck are apparent. It is evidently a species widely 

 distributed in the Miocene of central Europe. The synonymy of 

 this species contains many references which evidently should be 

 placed under other species but without seeing the original specimens, 

 it is not always possible to be sure of the exact position of tliese. 

 Some of the more obvious ones will be noted especially under the 

 living species. 



SIPHONINA PULCHRA Cushman 

 Plate 2, fig. 5 



Siphonina pulcJira Cushman, Carnegie Inst. Washington, Publ. 291, 1919, p. 42, 

 pi. 14, figs. 7 a-c; Publ. 311, 1922, p. 49, pi. 7, figs. 11, 12 ; Publ. 344, 1926, 

 p. 42. 



Siphonina reticulata Cushman (not Czjzek), Carnegie Inst. Washington, Publ. 

 291, 1919, p. 42. 



Test nearly circular, about equally biconvex, periphery subacute 

 or even somewhat rounded, compressed ; chambers usually five in the 

 last-formed volution, not inflated; sutures distinct not depressed, 

 limbate; wall smooth, conspicuously perforate; aperture elliptical, 

 with a distinct lip and short well-marked neck. 



Diameter up to 0.65 mm. ; thickness 0.30 mm. 



The types of this species are from the Miocene of the gorge of the 

 Yumuri River, Matanzas, Cuba. The species evidently persists and 

 is now living in the general West Indian Region. It occurred at the 

 Tortugas and also in collections from Porto Rico. 



The young stages are much more like Siphonina fiTnbriata (Czjzek) 

 but in the adult the specific characters are taken on making a very 

 different test, the peripheral carina is largely lost and the sutures 

 become more limbate. The species is evidently a derivative from 

 S. advena Cushman of the Lower Oligocene and in the deeper waters 

 of the West Indian region is also represented by >S'. hradyana Cush- 

 man, new species described on a later page. 



SIPHONINA AUSTRALIS, new species 



Plate 2, figs. 6 a-c; plate 3, figs. 7 a-c, 8 a-c 



Test rounded, biconvex, usually slightly more convex on the ven- 

 tral side, periphery subacute; chambers usually five in the last- 

 formed volution, slightly inflated ventrally; sutures on the dorsal 

 side limbate, marked by the crenulations of the margin of the earlier 

 chambers, ventral sutures slightly curved, nearly radial, very slightly 



