164 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. XXXIV. 
Family NUMMULINID 2. 
Subfamily POLY STOMP LULIN A. 
Genus NONIONINA. 
NONIONINA DEPRESSULA (Walker and Jacob). 
Nautilus depressulus WALKER and JAcos, Adam’s Hssays, Kanmacher’s ed., 
UADS, jo C4], Toll ny, ie, BR 
Widely distributed at the present time and common in the Euro- 
pean Tertiaries. Found at Stations D. 4025, H. 4430, H. 4440, and 
Il. 4466. | : | 
NONIONINA ORBICULARIS Brady. 
Noninina orbicularis Brapy, Denkschr. Akad. Wiss. Wien, XLIII, 1881, 
10s JOS, jo sa WSS By Oi, OS AN, WES ING ISNIGiG, Ses B WOOL joy Zhi, joll 
SOM, ISS, H, Gy We 
I think Tam right in placing the small Vonéonina found at Station 
TH. 4566 in this species. The form resembles Vonionina pompilioides 
in outline, but the former has more segments, thicker umbilici, and 
less regular arrangement of the segments. This species has been 
dredged off the cold waters of Spitzbergen, off the Canaries, off Pata- 
gonia, and elsewhere, but at very shallow depths. It 1s obtained in 
the Eocene and later Tertiary of Europe. Station H. 4566. 
NONIONINA POMPILIOIDES (Fichtel and Moll). 
Nautilus pompilioides Wrcuren and Monn, Test. Microse., 1803, p. 31, pl. 
11, figs. a—e. 
Test thicker and more involute than Vonionina wmbilicatula, which 
this species resembles, and the septa less distinct. Reported to be less 
common than similar species. Chiefly confined to deep water and gen- 
erally below 1,000 fathoms. Fossil in the Miocene and later forma- 
tions. Station H. 4567 only, and not common. 
NONIONINA..SCAPHA (Fichtel and Moll). 
Nautilus scapha KicHtTEL and Mou, Test. Microse., 1803, p. 105, pl. xix, 
figs. d-f. 
The elongate oval segements and depressed chambers which rapidly 
enlarge from the umbilicus make the form easily recognizable. Fre- 
quent in dredgings from many regions and common as a fossil in the 
Tertiary. It does not appear to be limited in depth. Stations D. 
4000, D. 4025, H. 4440, H. 4567, and H. 4696 afford specimens of 
this species. It appears to be the most common Nonionina in our 
dredgings. 
