64 



BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



off Darvel Bay, Borneo, bottom temperature 38.3° F. (3.5° C.) ; 

 D5585, Sibuko Bay, Borneo, 476 fathoms (871 meters), bottom tem- 

 perature 41.1° F. (5° C); D5591, in 260 fathoms (480 meters), 

 Sibuko Bay, Borneo; Do651, in 700 fathoms (1,280 meters); and 

 D5656, in 484 fathoms (885 meters), both in the Gulf of Boni. 



The microspheric form of the variety is only about half the size of 

 the microspheric form of the typical. 



Ammodiscus incertus, var. discoideus — Material examined. 



AMMODISCUS EXSERTUS Cushman. 



Plate 5, fig. 4. 



Ammodisciis exsertxis Cushman, Bull. 71, U. S. Nat. Mius., pt. 1, 1910, p. 75, figs. 

 97a, h (in text). 



The only station at which this species occurred is D5637, Bouro 

 Island (south) and vicinity, 700 fathoms (1,280 meters). 



Family LITUOLIDAE. 

 Subfamily Aschemonellinae. 



Genus ASCHEMONELLA H. B. Brady, 1879. 



ASCHEMONELLA OATEN ATA (Norman). 



Plate 6, fig. 5. 



Astrorhiza catenata Norman, Proc. Roy. Soc. London, vol. 25, 1876, p. 213. 

 Aschemonella catenataH. B. Brady, Quart. Journ. Micr. Sci., vol. 19, 1879, p. 42, 



pi. 14, figs. 12, 13; Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 271, pi. 27. 



figs. 1-11; pi. 27A, figs. 1-3.— €tTSHMAN, Bull. 71, U. S. Nat. Mus., pt. 1, 1910, 



p. 81, figs. 111-113 (in text). 



A single specimen here figured occurred at D5637, Bouro Island 

 (south) and vicinity, 700 fathoms (1,280 meters). It was also 



