102 



SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY, 1921. 



series of pits in a more or less linear arrange- 

 ment. Length about 1 millimeter. 



Plate XXV, figure 3b, shows the character 

 of this ornamentation, much enlarged. This 

 is not a common species in the Byram marl, 

 but several specimens were found. 



Genus VERTEBKALINA DOrbigny, 1826. 

 Vertebralina advena Cushman, n. sp. 



Plate XXV, figures 5, (i. 



Test compressed, in the adult with three 

 chambers in the final whorl, the chamber 

 angled, surface with numerous strong longi- 

 tudinal costae, aperture elongate, -with a flar- 

 ing everted lip. Diameter 1 millimeter. 



This species is rare in the Byram marl. It 

 may be that some of the specimens which have 

 been assigned to Articulina sulcata, based on 

 the figure given by Brady, are V. advena. 

 Heron-Allen and Earland record A. sulcata 

 from the Kerimba Archipelago. Sidebottom 

 records the species from the Mediterranean, 

 and his figures show that his specimens were 

 evidently Articulina. The specimen from the 

 Abrolhos Bank figured by Brady, Parker, and 

 Jones is apparently not the same. 



Forms similar to this should be looked for in 

 the tropical Indo-Pacific. A specimen I have 

 figured as Articulina sulcata " is very close to if 

 not identical with the Bvram marl species. 



Vertebralina sp. 



Plate XXV, figure 7. 



In the marl at Byram was found a single 

 specimen of a very thin, complanate species 

 with numerous distinct anastomosing costae as 

 a surface ornamentation. 



It is very distinct from T". advena, described 

 above, but the single specimen is not enough 

 for specific determination and description. 



Genus QUINQUELOCULINA DOrbigny. 

 Quinqueloculina crassa D'Orbigny? 



Plate XXVII, figures 1, 2. 



Quinquelrindina crassa D'Orbigny, Annales sri. nat., vol. 

 7, p. 301, No. 14, 1826. 

 Terquem, Sor. gpol. France Mem., 3d ser., vol. 2, 



pt. 3, p. 186, pi. 20 (28), figs. 20, 21, 1882. 

 Fornasini, Accad. sri. 1st. Bologna Mem., Gth ser., 

 vol. 2, p. 65, pi. 3, fig. 5, 1905. 

 Miliolina crassa Heron-Allen and Earland, Zool. Hoc. 

 London Trans., vol. 20, p. 572, pi. 42, figs. 37-41, 

 1915. 



» U. S. Nat. Mus. Bull. 71, pt. li, pi. 22, figs. 5a, b, 1917. 



A species that is fairly common in the marl 

 at Byram is rather close to Q. crassa as figured 

 by Heron-Allen and Earland from their Ke- 

 rimba Archipelago material. It is referred 

 questionably to this species. The Byram spec- 

 imens have perhaps a little finer costae but are 

 otherwise similar to the Kerimba form. 



Quinqueloculina bicostata D'Orbigny, var. 



Plate XXVI, figures 2-4. 



A form of Quinqueloculina which is one of 

 the most common fossils in the Byi-am marl 

 may be referred to Q. hicostata D'Orbigny. 

 The specimens are, however, more elongate 

 than tlie types,'" or those of Heron-Allen and 

 Earland, from the Kerimba Archipelago." 



The Byram specimens are referred to this 

 species provisionally, but they may represent 

 a distinct variety or species, their main resem- 

 blance to the typical form being in the bicos- 

 tate character of the periphery of the chambers. 



The species which perhaps comes nearest 

 to this Byram marl material is that figured by 

 D'Orbigny'- as Q. juhana. 



Quinqueloculina cuvieriaiia D'Orbigny. 



Plate XXVI, figure 1. 



Quinf]U4-Ioculina rurliriana D'Orbigny, in De la Sagra, 

 Histoire physique, politique et naturelle de I'lle 

 de Cuba, Foramini feres, p. 104, pl. 11. figs. 19-21, 

 1S39. 

 Cushman, U. S. Nat. Mus. Bull. 71, pt. 6, p. 47, i)l. 12, 

 fig. 2, 1917. 



The typical form of this species described 

 by D'Orbigny from specimens obtained from 

 the shore sands of Cuba occurs very rarely in 

 the marl at Byi-am. Several authors cite the 

 figures in the Challenger report, which do not 

 represent this species but rather Q. lamarcl"- 

 iana D'Orbigny. The typical form is found, 

 however, in eastern waters. I have had it 

 from shallow water in Hongkong Harbor, and 

 it occurs elsewhere in the Indo-Pacific region. 



The accessory costae at either side of the 

 shiirp margin are characteristic of the species. 



Quinqueloculina venusta Karrer?, var. 



Plate XXVI, figure 5. 



This elongate, angled form is somewhat like 

 the form figured by Brady in the Challenger 



'» D'Orbigny, A. D,, in De la Sagra, Ram6n, Histoire physique, poli- 

 tique et naturelle de I'ile de Cuba, Foraminittres, p. 195, pl. 12, figs. 8-10, 

 1839. 



" Zool. Soc. London Trans., vol. 20. p. 572. pl. 42, figs. 42-45, 1915. 



" ForaminiKres fossiles du bassin tertiaire de Vienne, pl. 20, figs. 1-3, 

 1846. 



