46 BULLETIN 71, UNITED STATES NATIONAL MUSEUM. 



subcarinate, or smooth and without the beading, occasionally rounded 

 and not distinctly carinate, aperture rounded. 



Length 0.35 mm. 



Distribution. — Brady records this species from one North Pacific 

 Challenger station, 241 in 2,300 fathoms. 



This has by some authors been referred to L. orbignyana as a 

 variety. 



Subfamily 3. W ODOS A.R.IINJE. 



Test polythalamous ; chambers arranged in a straight, arcuate, 

 planospiral or uncoiling series, apertures either radiate or with a neck 

 and phialine lip. 



Genus NODOSARIA Lamarck, 1812. 



Nodosaria Lamarck (type, N. raphanistrum (Linnaeus) , (ExtraitCoursZool., 1812, 

 p. 121; Hist. Anim. Sans Vert., vol. 7, 1822, p. 596.— H.B. Beady, Rep. 

 Voy. Challenger, Zoology, vol. 9, 1884, p. 488. 



Description. — Test composed of a straight or arcuate series of 

 chambers, either loosely joined together by stolons or close-set and 

 overlapping or various forms between; surface smooth or orna- 

 mented; aperture either radiate or with a definite neck and phialine 

 lip. 



In this genus both microspheric and megalospheric forms occur. 

 In some species the megalospheric proloculum is the largest chamber 

 of the series and none of the following chambers attain so large a 

 diameter. In the microspheric form the proloculum is very small 

 and the chambers gradually increase in size. 



Some species tend to show definite senescent characters in the loss 

 of the ornamentation in the later developed chambers. In some cases 

 also the last formed chamber tends to become separated from the 

 preceding ones by a constriction of the connection between them 

 and a Lagena-like last chamber results. 



In some species the ornamentation extends back to the proloculum 

 which assumes the characteristic costae, etc., of adult chambers. 



In the subgenus Glandulina there is a tendency for the chambers 

 to reach back and overlap the preceding ones, often making the 

 sutures hardly visible, with little or no depression. 



In Dentalina there is a tendency toward an arcuate form with the 

 sutures coincidently oblique instead of directly transverse. Such 

 conditions tend toward the theory that these may in reality be 

 uncoiled forms which have in the megalospheric form at least lost 

 their early coiled stages. The microspheric form in rare cases shows 

 a tendency of the early chambers to be coiled in these arcuate and 

 oblique sutured forms. 



It is possible that Glandiolus Montfort, 1808, may have to replace 

 Nodosaria Lamarck, 1812, if an examination of Montfort's types 



