13 
They also note differences between the Arctic and North Atlantic specimens 
referred to this species and also that Reuss’s figure is not exactly like either. 
P. frigida is evidently an Arctic species of definite distribution and definitely 
characterized. 
FAMILY NUMMULITIDAE. 
GENUS NONIONINA D’ORBIGNY, 1826. 
Nonionina orbicularis H. B. Brady. 
Nonitonina orbicularis H. B. Brady, Denkschr. Akad. Wiss. Wien, vol., 48, 1881, 
p. 105, pl: 2;figs. 5a,b; Ann. Mag.> Nat: Hist., ser. 5; vol. 8, 1881, p. 415; 
pl. 21, figs. 5a, b; Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 727, pl. 109, 
figs. 20, 21.—Heron-Allen and Earland, Trans. Linn. Soc. London, Zoology, 
ser. 2, vol. 11, 1916, p. 280. 
In the Hudson Bay collection this species is fairly common, especially at 
station 5, with fewer specimens at station 6. They are very simular in all respects 
to the specimen figured by Brady from off Nova Zembla. The species is evi- 
dently an Arctic one of wide distribution in cold waters. The figures of speci- 
mens from warm waters referred to this species are evidently nat identical with 
it. In general form, and especially in the condition of the umbilicus and sutures, 
the specimens are exactly like the Nova Zembla specimens. 
Nonionina stelligera d’Orbigny. 
This species I have already recorded from the collection of the Canadian 
Arctic Expedition. It is known from many Arctic and Subarctic localities. 
The only specimen from Hudson Bay was from station 3. 
D’Orbigny’s original specimens were from shore sands from the Canaries 
at Teneriffe, and it would be interesting to obtain specimens of this from this. 
locality to see if in reality it is the same as this widely distributed Arctic species 
Nonionina scapha (Fichtel and Moll). 
Nautilus scapha Fichtel and Moll, Test. Micr., 1803, p. 105, pl. 19, figs. d-f. 
Nonionina scapha Parker and Jones, Ann. Mag. Nat. Hist., ser. 3, vol. 5, 1860, 
p: 102, No. 4. 
Polystomella crispa Linné, vat. (Nonionina) scapha Parker and Jones, Phil. 
Trans., vol. 155, 1865, p. 404, pl. 14, figs. 37, 38; pl. 17, figs. 55, 56. 
A very few specimens were obtained from station 5. They are of the very 
broad, triangular form, in apertural view similar to the Arctic and North Atlantic 
specimens figured by Parker and Jones in the above reference. This form is 
very striking and different from many of the figures assigned to this species from 
other regions by many authors. 
= GENUS POLYSTOMELLA LAMARCK, 1822. 
Polystomella striato-punctata (Fichtel and Moll), var. incerta (Williamson). 
This variety I have already recorded from the collection of the Canadian 
Arctic Expedition. It has occurred in the Hudson Bay collection at all but one 
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