100 BULLETIN 71, UNITED STATES NATIONAL MUSEUM. 



Distribution. — From the known records this species seems to be 

 confined to the region of coral reefs, although it may occur at con- 

 siderable depths, as shown by Chapman, who records it at 2,400 fath- 

 oms off Funafuti. Such records as have already been noted in regard 

 to other coral reef species in this paper may be due to the carrying 

 out of such species into deep water through the action of currents. 

 Brady records this species from north of New Guinea in 1,850 fathoms 

 as the only North Pacific station. I have not seen it from the region 

 of the coral reefs of the Hawaiian Islands nor does Bagg record it 

 from this region. I have found it, however, in material from several 

 Nero stations near Guam in 859 to 1,503 fathoms. This material is 

 typical. 



There is a considerable variation in the costae, which in some cases, 

 as shown in figure 2, are only developed on the periphery of the 

 chambers. 



UVIGERINA ACULEATA d'Orbigny. 

 Plate 43, fig. 4. 



Urigerina aculeata d'Orbigny, Foram. Foss. Bass. Tert. Vienne, 1846, p. 191, pi. 

 11, figs. 27, 28.— H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 

 578, pi. 75, figs. 1, 2.— Wright, Proc. Roy. Irish Acad., ser. 3, vol. 1, 1891, 

 p. 487. — Egger, Abh. kon. bay. Akad. Wiss. Munchen, CI. n, vol. 18, 1893, 

 p. 311, pi. 9, figs. 48, 49.— Chapman, Proc. Zool. Soc. London, 1895, p. 35.— 

 Goes, Bull. Mus. Comp. Zool., vol. 29, 1896, p. 50.— Fornasini, Boll. Soc. 

 Geol. Ital., vol. 25, 1907, p. 348, pi. 4, fig. 1. — Chapman, Joum. Linn. Soc, 

 Zoology, vol. 30, 1910, p. 414. 



Description. — Test elongate, tapering; chambers numerous, in- 

 flated, sutures distinct, even under the ornamentation which in the 

 early chambers is often made up of longitudinal costse, the later 

 chambers or all-in some cases covered with a spinose development, 

 having the appearance in certain specimens of a secondary shell 

 layer, the spines stout, initial end of the test acute, usually with a 

 spine; aperture with a short neck and flaring phialine lip. 



Length up to 1.5 mm. 



Distribution. — This species has been recorded from the North 

 Pacific by Goes, from the west coast of America in 759 to 1,218 

 fathoms. In the mounted set returned to the United States Na- 

 tional Museum by Goes there is but a single specimen of typical U. 

 aculeata, the others being U. pygmsea and U. asperula. In the 

 material which I have examined the typical form of the species 

 shown in the figures has occurred but once, Albatross D4957, off 

 Japan, in 437 fathoms, bottom temperature 39.8° F. At Nero 

 station 1154, 1,602 fathoms, a specimen was dredged showing this 

 spinose character well developed on the last formed chamber only. 

 This species seems to be more common in the South Pacific. 



