90 



SHORTER CONTRIBUTIOXS TO GENERAL GEOLOGY, 1921. 



sides nearly parallel, slightly lobulated; periph- 

 ery roundt'd but the median portion nearly 

 flat; chambers eighteen to twenty, increasing 

 in height as added, those of the later portion 

 nearly as high as broad, sutures usually rather 

 indistinct; wall coarsely arenaceous but 

 smoothly finished on the exterior; aperture at 

 the base of the inner margin of the chamber. 

 Length 2 millimeters or less. 



This species is represented by a few speci- 

 mens from the Byram marl of rather uniform 

 size and general character. 



Heron-Allen and Earland ' figure a Textu- 

 laria from the Kerimba Aicliipelago, off the 

 southeastern coast of Africa, which they refer 

 to T. hanerii D'Orbigny. In some of its char- 

 acters our Byram marl species resembles this. 

 A similar form from the Philippines I have 

 referred to T. hauei'ii. A study of D'Orbigny 's 

 T. haui'iii from the Vienna Basin, however, 

 shows that it is very dift'erent from the Byram 

 species and apparently also dift'erent from the 

 Philippine and Kerimba species. 



Textularia mississippiensis Cushman, n. sp. 



Plate XI\', ri,i,'ure4. 



Test elongate, fairly broad, thickest in the 

 middle, thence thinning toward the periphery, 

 in end view biconvex, central portion curved; 

 chambers rather low and broad, especially in 

 the early stages, becoming higher in the adult 

 and often less broad so that the later chambers 

 in the adult make a test less wide than at 

 earlier stages; sutures covered by a coarsely 

 arenaceous layer meeting in the center and at 

 the periphery, leaving the central portion of 

 each chamber uncovered, periphery irregular, 

 not definitely or regularly spinose; chamber 

 walls smooth and finely perforate. Length 

 0.40 to 0. .■).") millimeter. 



This is a common small species in the Byram 

 mail. It is in general character very uniform 

 in the material studied and also very constant 

 In size. In some of its features it resembles 

 T. psiudocarinata Cushman {T. airiiiata H- 

 B. Brady; not T. cariiidtd D'Orbigny), but it 

 is much smaller and lacks the strongly rliom- 

 boidal shape in end view, and the carinae and 

 especially the spines are not so definitely de- 

 veloped. T. pxi udociiriiiata is especially char- 

 acteristic of the Philippine region. The Byram 

 species also resembles very much the form I 



' Zool. Soc. I-ondon Trans., vol. 20, ],. 62S, pi. 47. figs. 21-23, 191.'). 



have described as T. sagittiila var. nfrata,^ 

 which came from the eastern channel of Korea 

 Strait, in .59 fathoms. 



Textularia folium Parlier and Jones. 



Plate XIV, figure :^. 



Texliilariii folium Parker and Jones, Roy. Soc. Philos. 



Trans., vol. 1.5.5, pp. 370, 420, pi. 18, fig. 19, lS(i5. 

 Moeliius, Beitrago ziir Meeresfauna der Insel Mauritius, 



p. 92, pi. 8. figs. 16, 17, 1880. 

 H. R. Brady. Challimicr Kept., Zoology, vol. 9, p. 357, 



pi. 42, figs. 1-5, 1884. 

 Egger, K. Iiayer Akad. Wiss. Munchen Abli., f'l. 2, 



vol. 18, p. 272, pi. fi, figs. 27, 28, 1893, 

 Chapman, Linnean Soc. London .lour. (Zoology), 



vol. 28, p. 184. 1900 [1902]; Quekett Micr. Club 



.Tour., 2d ser., vol. 10, p. 127, pi. 9, fig. 4, 1907 [1909]. 

 Rhumbler. Zool. .Jahrb.. Abt. Syst., vol. 24. p. 59, 



pi. 5. figs. 51, 52, 190(i. 

 Bagg, U. S. Nat. Mus. Proc, vol. 34, p. i:?0, 1908. 

 Cushman, U. S. Nat. Mus. Bull. 71, pt. 2. p. 19, 



figs. 31-33 (in text), 1911. 

 Heron-Allen and Earland, Zool. Soc. London Trans., 



vol. 20, p. (123, 1915. 



Test small, very much flattened, broad, in 

 front view triangular, in edge view narrow, 

 tapering toward the acute margins; chambers, 

 especially in later develojjment, broad and 

 low, somewhat recurved, the inner and distal 

 margins thickened, prolonged at the periphery 

 into short backward-pointing spinose processes, 

 smooth; wall fairly thick. Length not usually 

 exceeding 0.5 millimeter. 



This species is rare in the Byram marl at 

 Byram (U. S. G. S. station 645,5). The only 

 difl'erence between this and living specimens 

 lies in its more regular development of spinose 

 projections. It is very interesting, however, 

 in showing the relationship of the Byram marl 

 fauna to existing faunas. At the present time 

 the species seems to be confined to the Indo- 

 Pacific region and is more abundant in the 

 south Pacific than elsewhere. It is knowTi 

 from rare specimens obtained in Mauritius 

 (Moebius) and in the Kerimba Archipelago, off 

 southeastern Africa (Heron-Allen and Earland). 

 It was originally described from specimens 

 coUected in the shore sands of Melbourne, 

 Australia, by Parker and Jones. H. B. Brady 

 gives the following localities in the CltaJlengtr 

 rejiort: Off East Moncoeur Island, Bass Strait, 

 38 fathoms; off Raine Island, Torres Strait, 

 155 fathoms; oft' Kandavu, Fiji, 255 fathoms; 

 oft' Levuka, Fiji; Nares Harbor, Admiralty 

 Islands, 17 fathoms; Honolulu coral reefs, 



! V. S. Nat. Mus. Bull. 71, i)t. 2, p. 7, figs. 2-5 (in text), 1911. 



