68 BULLETIN 71, UNITED STATES NATIONAL MUSEUM. 



fathoms, off the western coast of tropical America. It has occurred 

 frequently, in the material I have had, off Alaska, about the 

 Hawaiian Islands, near the Galapagos, off Guam, and at numerous 

 stations off Japan. These for the most part have been in com- 

 paratively shallow water, ranging from 21 to 316 fathoms. 



Fig. 34.— Triloculina circularis (Bornemann). X13. Adult specimen showing the trlloculine 



CHARACTER IN THE FULLY DEVELOPED SPECIMEN. 



The species seems to be definitely triloculine in its fully developed 

 condition, although as might be expected from its development the 

 early stages are quinqueloculine. The apertural characters are 

 rather striking. 



TRILOCULINA CIRCULARIS Bornemann, var. SUBLINEATA (H. B. Brady). 



Plate 26, fig. 2. 



Miliolina circularis Bornemann, var. sublineata H. B. Brady, Rep. Voy. Chal- 

 lenger, Zoology, vol. 9, 1884, p. 169, pi. 4, fig. 7a-c. 



Description. — "Similar in general contour, disposition of segments, 

 form of aperture, and dimensions to Miliolina circularis. Shell thin 

 and often sub translucent; decorated with a surface ornament of deli- 

 cate, interrupted, longitudinal striae." 



Distribution. — Brady described this variety from a single Challen- 

 ger station, off the Admiralty Islands, on the north coast of New 

 Guinea in 15 to 25 fathoms. The material I have had has come 

 from two Albatross stations, D4807 in 44 fathoms and D4900 in 139 

 fathoms, both off the coast of Japan. 



The specimens are very similar to those figured by Brady, most of 

 them even more so than the figured specimen, in which the surface 

 striae are rather more prominent than usual. 



TRILOCULINA CYLINDRICA Fornasinl. 



Plate 17, fig. 10. 



Triloculina cylindrica D'Orbigny (fide Fornasini), Ann. Sci. Nat., vol. 7, 1826, 

 p. 300, No. 19. — Fornasini, Mem. Accad. Sci. Istit. Bologna, Ber. 6, vol. 2, 

 1905, p. 61, pi. 1, figs. 13a-6. 



Miliolina cylindrica Rhumbler, Zool. Jahrb., Abteil. Syst., vol. 24. 1907, p. 50, 

 pi. 3, fig. 36. 



Distribution. — Rhumbler records a few specimens from Chatham 

 Island which he refers to this species. 



The accompanying figure is from Rhumbler. 



