64 BULLETIN 104, UNITED STATES NATIONAL MUSEUM 



ROTALIA PULCHELLA d'Orbigny (?) 



In the Cuban report, this species is also figured as coming from 

 Cuba. It is known only from the Indo-Pacific, and like the preceding 

 probably was included by some error as coming from this locality. 



ROTAUA SCHROETERIANA Parker and Jones (?) 



Under this name, Heron-Allen and Earland ^^ record a specimen 

 from a station west of Scotland. It is much simpler than the usual 

 form of this species as developed in the Indo-Pacific, and seems to 

 be far from its normal habitat. More specimens would be necessary 

 to confirm this as identical with the large tropical species of this name. 



Subfamily 5. Siphonininae 



Test trochoid, at least in the early stages, umbilical area filled, 

 supplementary apertures near the periphery and just below it on the 

 ventral side, sometimes with a neck and lip. 



Genus EPISTOMINA Terquem, 1883 



Epistomina Terquem, Bull. Soc. Gdol. France, ser. 3, vol. 11, 1883, p. 37. — 

 CusHMAN, Contr. Cushman Lab. Foram. Res., vol. 3, 1927, p. 181; Special 

 Publ. No. 1, Cushman Lab. Foram. Res., 1928, p. 276. 



Rotalia (Turbinulina) (part) d'Orbigny, 1826. 



Pulvinulina (part) of Authors. 



Placentula Berthelin, 1882 (not Lamarck). 



Genotype, by designation. — Epistomina regularis Terquem. 



Test free, biconvex, trochoid, all whorls visible from the dorsal side, 

 only the last-formed one from the ventral side; chambers numer- 

 ous, usually distinct, not inflated; sutures distinct, of very solid ma- 

 terial, limbate, on the dorsal side oblique, on the ventral side oblique- 

 ly radiate, strongly limbate in nearly all species, sometimes strongly 

 raised into a highly ornate surface, umbilicus usually filled and um- 

 bonate; wall finely perforate, usually thin between the sutures, es- 

 pecially on the dorsal side, often with irregular thickened areas appear- 

 ing light colored against the darker translucent portion; apertures of 

 two sorts, one in the normal position for the Rotaliidae, at the inner 

 margin of the ventral side of the chamber or in the face itself, the 

 other elongate, just below the periphery and in the axis of coiling, in 

 later chambers usually filled with clear shell material. 



The genus is well developed from the Jurassic onward. The Jurassic 

 and Early Cretaceous species are highly ornate while most of the Late 

 Tertiary and the Recent species are smooth. The living forms can 

 be grouped under a single species. 



" Trans. Linn. Soc. London, ser. 2, vol. 11, 1916, p. 278, pi. 43, figs. 1-3. 



