FORAMINIFERA OF THE NORTH PACIFIC OCEAN. 39 



VERTEBRALINA INSIGNIS H. B. Brady. 



Plate 22, figs. 1, 2. 



Vertebralina insignis H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, 

 p. 187, pi. 12, figs. 9-11.— Flint, Rept. U. S. Nat. Mus., 1897 (1899), p. 302, 

 pi. 47, fig. 4— Bagg, Proc. U. S. Nat. Mus., vol. 34, 1908, p. 123. 



Description. — "Test compressed, planospiral, subquadrangular, 

 nearly symmetrical bilaterally; margin angular or partially carinate. 

 Segments few, more or less triangular in outline, embracing the three 

 segments of the final convolution (with or without a single addi- 

 tional or nonspiral segment) forming almost the entire visible shell. 

 Surface decked with exogenous costae, either distinct or in some 

 parts combined so as to form an irregular reticulated ornament. 

 Aperture a long bordered slit on the median line of the outer face of 

 the terminal chamber. 



"Length, one twenty-fifth inch (1 mm.)." 



Distribution. — Bagg records this rare species from Albatross station 

 H4694 in 865 fathoms off the Hawaiian Islands. I have examined 

 Bagg's specimen from this station and agree with him in the deter- 

 mination. The specimen has a median aperture and the reticulated 

 ornamentation mentioned by Brady, but not nearly as definitely 

 shown in his figures as is the case in this specimen. 



The finding of this species seems all the more remarkable as Bagg 

 did not record V. striata, which has proved not to be uncommon about 

 the Hawaiian Islands, as shown by the Nero material which I have 

 examined. 



Genus NODOBACULARIA Rhumbler, 1895. 



Nubecularia (part) Jones and Parker, Quart. Journ. Geol. Soc, vol. 16, 1860, 

 p. 455. — H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 135. 



Nodobacularia Rhumbler, Nach. Ges. Wiss. Gottingen, 1895, p. 87 (Type 

 N. tibia (Jones and Parker)); Zool. Jahrb., Abteil Syst., vol. 24, 1907, p. 37. 



Description. — Test composed of a proloculmn and second Cornuspira- 

 like chamber, usually directly followed by a linear series of subcylin- 

 drical chambers; test imperforate, calcareous. 



This genus apparently most common in the warm, shallow tropical 

 seas is a very simple one developed from a Cornusp>ira-like early 

 development. Most of the figured specimens seem to be megalo- 

 spheric, and the microspheric form might possibly show develop- 

 mental stages lacking in the megalosphcric form of the species. 



NODOBACULARIA TIBIA, (Jones and Parker). 



Plate 8, figs. 1, 2. 



Nubecularia tibia Jones and Parker, Quart. Journ. Geol. Soc., vol. 16, 1860, 

 p. 455, pi. 20, figs. 48-51.— H. B. Brady, Quart. Journ. Micr. Sci., vol. 19, 

 1879, p. 52, pi. 8, figs. 1, 2; Rep. Voy. Challenger, Zoology, vol. 9, 1884, 

 p. 135, pi. 1, figs. 1-4. 



