26 BULLETIN 71, UNITED STATES NATIONAL MUSEUM. 



costae, plate-like at the aboral end of the test spreading into wing-like 

 expansions showing transverse striations. 



Length 0.60 to 0.75 mm. 



Distribution. — This species does not seem to have been previously re- 

 ported from the North Pacific. Typical specimens were obtained in 

 material from two Nero stations; 1117 in 2,123 fathoms and 1294 in 

 1,417 fathoms, between Yokohama and Guam. 



Nearly all the records for the distribution of this species are in deep 

 water and these two are no exceptions to the rule. Most of the sta- 

 tions are in tropical or subtropical waters but the depth at which the 

 species has occurred precludes any influence of temperature in the 

 distribution. 



LAGENA STELLIGERA H. B. Brady. 



Plate 12, fig. 3. 



Lagena stelligera H. B. Brady, Quart. Journ. Micr. Sci., vol. 21, 1881, p. 60; 

 Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 466, pi. 57, figs. 35, 36.— Side- 

 bottom, Journ. Quekett Micr. Club, vol. 11, 1912, p. 391, pi. 15, figs. 28, 29; 

 pi. 16, figs. 1-4. 



Description. — Test pyriform, broadest near the middle, tapering 

 toward the truncate base and toward the obtusely pointed apertural 

 end; aboral end of the test with a central raised circular rim from the 

 periphery of which radiate eight to twelve short acute costae extending 

 a short distance up the basal portion of the test ; wall smooth above or 

 with slight crenulations about the aperture; the wall about the neck 

 often with darker concentric circles of a slightly darker color. 



Length 0.5 to 0.8 mm. 



Distribution. — This species is recorded by Brady in the Challenger 

 Report from deep water in the North Pacific Ocean in 2,300 fathoms. 

 I have hadi< T.3cimens from three Nero stations between Yokohama 

 and Guam, 1128 in 1,418 fathoms; 1294 in 1,417 fathoms, and 1318 

 in 1,210 fathoms. 



In the work above quoted Sidebottom refers many variations to 

 this species but in the material I have seen from these stations the 

 specimens correspond very closely with the figures given by Brady, as 

 will be seen from the specimen figured here. 



LAGENA CRESCENTICOSTATA, new species. 

 Plate 17, figs. 1, 2. 



Description. — Test ovate, widest below the middle, aboral end sub- 

 truncate, much compressed, surface with a broad flange-like extension 

 ornamented with interrupted costge, central portion of the test 

 separated from the flange by a raised crescentiform ridge open at the 

 aboral end, the central area ornamented by interrupted costse, aper- 

 ture with a short tapering neck. 



Length 0.75 to 1.00 mm. 



