MILIOLIDAE — ARTICULINA; HAUERINA. 71 



off the north coast of Jamaica, and it has occurred at several stations 

 in the Tortugas, but is rare at all of them. IL may be distinguished 

 from A. sagra by its much greater compression and the great dif- 

 ference in shape, especially in the uniserial portion, due to the fact 

 that the lip is not everted, and therefore the start of each chamber 

 is not greater than that of the preceding to any amount. 



Articulina antillarum, new species. 

 (Plate 12, Figure 6.) 



Test elongate, early portion in the microspheric form milioline, in the 

 megalospheric form Cornuspira-like, the remainder and larger portion of the 

 test made up of a linear series of elongate chambers gradually increasing in 

 size toward the apertural end; chambers truncate at the distal end, then 

 somewhat fusiform, and the apertural end fitted with a broadly flaring lip; 

 aperture circular, without a lip; surface of the chambers with several rounded, 

 longitudinal costse. 



Length up to 2 mm. 



Specimens of A. antillarum were found at a few stations, usually 

 not in any considerable numbers. They resemble somewhat speci- 

 mens referred to Articulina conico-articulata by Millett (Journ. Roy. 

 Micr. Soc, 1898, plate 12, figs. 9, 10), but have a very different 

 shape and appearance. They are very close to some of the speci- 

 mens referred to this species by Pleron-Allen and Earland from the 

 Kerimba Archipelago (Trans. Zool. Soc. London, vol. 20, 1915, plate 

 45, figs. 29, 31). Our specimens, however, have a much longer test, 

 and their general appearance is somewhat different. There seems to 

 be a difference in the form and shape of the chambers in the two 

 forms, the megalospheric being less fusiform than in the microspheric. 



Articulina mayori, new species. 

 (Plate 13, Figure 5.) 



Test elongate, slender, early portion milioline, later chambers elongate, 

 fusiform; surface faintly striate; apertural end contracted, with a distinct, 

 everted lip; aperture circular. 



Length 1 mm. or slightly more. 



This is a very slender, delicate species, easily broken, and found, 

 probably for this reason, in the material from but two stations. It 

 is very different from the preceding in all its characters, reminding 

 one somewhat of the specimens referred by Brady in the Challenger 

 report to Articulina conico-articulata (plate 13, fig. 1). No speci- 

 mens with coiled young were found in this species. 



Genus HAUERINA d'Orbigny, 1846. 

 Hauerina bradyi Cushman. 



Hauerina compressa H. B. Brady (not H. compressa d'Orbigny), Rep. Voy. Challenger, 



vol. 9, 1884, p. 190, pi. 11, figs. 12, 13. 

 Hauerina bradyi Cushman, Bull. 71, U. S. Nat. Mus., pt. 6. 1917, p. 62, pi. 23, fig. 2; Proo. 



U. S. Nat. Mus., vol. 59, 1921, p. 72. 



