64 BULLETIN 71, UNITED STATES NATIONAL MUSEUM. 



Description. — Test compressed, early chambers milioline, later ones 

 either embracing and extending in to the center to hide the pre- 

 viously formed chambers or becoming elongate and more or less 

 encircling the periphery, surface ornamented by strong tranverse or 

 radial crenulations crossed by numerous fine longitudinal striae, 

 aperture consisting of numerous small pores in several linear series 

 extending the full height of the chamber. 



Diameter, up to 1.5 mm. 



Distribution. — Rhumbler records this species from Laysan Island. 

 This is the only published record for the North Pacific. I have had ma- 

 terial from Gaspar Straits (North Pacific Exploring Expedition, Captain 

 Rodgers), and from three Nero stations, 2041 in 33 fathoms, 2042 in 

 55 fathoms, and 2071 in 271 fathoms, all off the Hawaiian Islands. 



This seems to be also a species of the Indo-Pacific region and is one 

 of the most beautiful of the whole family of the Miliolidae. It is hard 

 to believe that the specimens figured by Brady with involute chambers 

 and the very open ones are both one species. In the latter it is not 

 unusual to find specimens like that figured by Brady, 1 where the last 

 formed chamber returns to the Cornuspira-like condition of its own 

 young and has an unbroken chamber about the entire test. 



HAUERINA FRAGILISSIMA (H. B. Brady). 



Plate 24, fig. 4. 



Spiroloculina fragilissima H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 



1884, p. 149, pi. 9, figs. 12-14. 

 Hauerina fragilissima Millett, Journ. Roy. Micr. Soc, 1898, p. 610, pi. 13, figs. 



8-10. 



Description. — "Test nearly circular, complanate, extremely thin; 

 peripheral edge rounded. Segments numerous, much curved, the 

 later ones in adult specimens nearly semicircular. Shell-wall deli- 

 cately thin and opalescent, the sutures appearing as conspicuous 

 white lines Aperture cribrate. 



"Diameter, one-thirtieth inch (0.8 mm.)." 



Distribution. — This species has apparently not previously been 

 recorded from the North Pacific. The only specimen I have seen is 

 one from Nero station 2071 in 271 fathoms off the Hawaiian Islands. 

 Brady records it from shallow water about the Society and Fiji 

 Islands and about Borneo, and Millett records it from the Malay 

 Archipelago. 



HAUERINA PACIFICA, new species. 



Plate 21, fig. 2. 



Description. — Test irregularly suboval in front view, early chambers 

 quinqueloculine, later ones nearly in one plane, slightly carinate, 

 otherwise nearly circular in tranverse section, wall smooth, in the last- 



i Rep. Voy. Challenger, Zoology, vol. 9, 1S84, pi. 7, fig. 20. 



