20 PROCEEDINGS OF THE NATIONAL MUSEUM vol.67 



PAVONINA FLABELLIFORMIS d'Orbigny • 



Plate 6, figs. 1-4 



Pavonina flabelliformis d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 260, 

 pi. 10, figs. 10, 11; For. Foss. Vienne, 1846, p. 72, pi. 21, figs. 9, 10.— 

 Parker, Jones, and H. B. Brady, Ann. Mag. Nat. Hist., ser. 3, vol. 16, 

 1865, p. 27, pi. 1, fig. 22.— H. B. Brady, Quart. Journ. Micr. Sci., vol. 

 19, 1879, p. 282, pi. 8, figs. 29, 30.— Mobius, Beitr. Meeresfauna Insel 

 Mauritius, 1880, p. 91, pi. 8, figs. 13-15.— H. B. Brady, Rep. Voy. 

 Challenger, Zoology, vol. 9, 1884, p. 374, pi. 45, figs. 17, 19-22 (not 18).— 

 MiLLETT, Journ. Roy. Micr. Soc, 1900, p. 7. — Bagg, Proc. U. S. Nat. 

 Mus., vol. 34, 1908, p. 132.— Cushman, Bull. 71, U. S. Nat. Mus., pt. 2, 

 1911, p. 30, figs. 51, 52 (in text). — Heron-Allen and Earland, Trans. 

 Zool. Soc. London, vol. 20, 1915, p. 632, pi. 48, figs. 1-6; Journ. Linn. 

 Soc. Zool., vol. 35, 1924, p. 619; Journ. Roy. Micr. Soc, 1924, p. 141, pi. 

 8, fig. 22. 



Pavonina Jlabelloides Bronn, Klassen und Ordnungen Thier-Reichs, vol. 1, 

 1859, p. 72, pi. 6, figs. 13o, b.— BtJTSCHLi, in Bronn, Klassen und Ord- 

 nungen Thier-Reichs, vol. 1, 1880, p. 204, pi. 18, fig. 13. 



Description. — ^Test free, many-chambered, much compressed, the 

 early portion consisting of a few small chambers arranged biserially, 

 the later chambers curved, spreading, uniserial or divided into more 

 than one in each curve, in adults often with the chambers becoming 

 almost annular; sutures somewhat limbate, depressed, distinct; wall 

 tliin and transparent, coarsely and irregularly punctate, the wall 

 about these punctae often thickened and slightly raised; apertures 

 in one or more linear rows about the periphery of the test, the periph- 

 eral face concave; color white. 



The diameter of the test rarely exceeds 1 mm. 



The species has an interesting distribution. The early specimens 

 of d'Orbigny were from Madagascar. It is apparently most abundant 

 in that general region as Heron-Allen and Earland record it very 

 splendidly developed in the Kerimba Archipelago nearby. Brady's 

 records of this species are "Madagascar, shore sand; Seychelle 

 Islands, shallow water; Port Louis, Mauritius, harbor mud; off 

 Calpentyn, Ceylon, 2 fathoms; off Raine Island, Torres Strait, 155 

 fathoms; Nares Harbor, Admiralty Islands, 17 fathoms; and Hono- 

 lulu Reefs, 40 fathoms." He records it also from Millet's collection 

 from the coast of Korea. Moebius had material from Mauritius. 

 Millett records a solitary specimen from his Malay Archipelago col- 

 lections. Bagg had it from Alhatross station D 4174, off the Hawaiian 

 Islands, and I have had it from Nero station 2042 in 55 fathoms, also 

 off Honolulu, Nero station 201, in 1,033 fathoms near Midway Island, 

 and station 1310 in 518 fathoms, near the Bonin Islands. There is 

 a single specimen in Tanager collections from 31 fathoms off Dowsett 

 Reef, to the northwestward of the Hawaiian Islands. Heron- Allen 

 and Earland record it from Lord Howe Island in the South Pacific. 



