10 PROCEEDINGS OP THE NATIONAL MUSEUM vol.67 



SIPHOGENERINA STRIATULA Cushman 



Plate 1, fig. 10a, b 



Siphogenerina striatula Cushman, Bull. 71, U. S. Nat. Mus., pt. 3, 1913, 

 p. 108, pi. 47, fig. 1. — Yabe and Hanzawa, Jap. Journ. Geol. Geog., 

 vol. 2, No. 2, 1923, p. 32. 



Description. — Test elongate, subcylindrical ; chambers mostly 

 broader than long, the last-formed one nearly as long as broad; 

 sutures distinct, slightly depressed; surface ornamented with very 

 fine, longitudinal striae; aperture narrowly elongated, without a 

 definite neck but with a well-developed lip. 



Length about 1 mm. 



Distrihution. — I originally found this species in material from 

 numerous stations between Yokohama and Japan, at depths ranging 

 from 859 to 1,660 fathoms. Yabe and Hanzawa record it as rare 

 from the Pliocene shell beds of Nojima, Japan. 



It would seem, therefore, that it is a species of the northwestern 

 Pacific. The finely striate surface and elongate aperture are charac- 

 teristic. 



siphogenerina LAMELLATA Cushman 



Plate 1, fig. 13 



Siphogenerina lamellata Cushman, Bull. 676, U. S. Geol. Surv., 1918, p. 55, 

 pi. 12, fig. 3. 



Description. — Test elongate, tapering gradually from the initial 

 end, broadly rounded at the apertural end; chambers comparatively 

 few, indistinct, surface ornamentations consisting of several equi- 

 distant, longitudinal lamellae extending from the initial end to the 

 apertural end, where they fuse; aperture with a tubular neck and 

 phialine lip. 



Length 1 mm. 



This species is known only from the Miocene of Florida, from the 

 Choctawhatchee Marl, one mile south of Red Bay, Florida. Its 

 nearest relative is S. spinosa Bagg from the Miocene of Maryland, 

 but the Florida species has much stronger developed lamellae and 

 no evidence of a spinose base. 



siphogenerina spinosa (Bagg) 



Plate 1, fig. 14 



Sagrina spinosa Bagg, Maryland Geol. Surv. (Miocene), 1904, p. 480, pi. 



133, fig. 11. 

 Siphogenerina spinosa Cushman, Bull. 676, U. S. Geol. Surv., 1918, p. 55. 



Description. — The original description of this species is as follows: 



This peculiar and interesting species somewhat resembles S. raphanus Parker 



and Jones, but differs from the latter in several particulars. The surface ridges 



inourspecimenendinaseriesof projecting points which at the distal end become 



definite spines, though these are short and stubby. Again there are arched 



