58 SHALLOW-WATER FORAMINIFERA OF TORTUGAS REGION. 



Family MILIOLID^. 



Genus CORNUSPIRA Schultze, 1854. 



Comuspira involvens (Reuss). 



Operculina involvena Reusa, Denkschr. Akad. Wisa. Wien, vol. 1, 1849. p. 370, pi. 45, fig. 20 

 Comuspira invohena Reuss, Situ. Akad. Wiss. Wien, vol. 48. 1863 (1864), p. 39, pi. 1, fig. 2.— 

 H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9. 1884, p. 200, pi. 11, figs. 1 to 3. — 

 H. B. Brady, Parker, and Jones. Trans. Zool. Soc. vol. 12. 1888, p. 216, pi. 40, 

 figs. 1 to 3.— Cushman, Bull. 71, U. S. Nat. Mus., pt. 6, 1917, p. 25, pi. 1, fig. 2; 

 pi. 2, fig. 2; Proc. U. S. Nat. Mus., vol. 69, 1921, p. 62. 



Although C. involvens occurs at numerous stations, all the speci- 

 mens are of small size and there is nothing at all to compare with the 

 species as it is developed in the warm coral-reef region of the Indo- 

 Pacific. Both microspheric and megalospheric specimens occur, the 

 former with three to four coils, the latter usually with not more 

 than two. 



Genus NUBECULARIA Defrance, 1825. 

 Nubecularia antillanun, new species. 

 Test attached, early portion consisting of a proloculum and one or two 

 chambers, forming a single coil, the main portion of the test consisting of an 

 irregular branching tube, slightly convex, with an irregular periphery, spread- 

 ing over the surface of the test to which it is attached; aperture at ends of 

 the branches. 



N. antillarum was j&rst noted attached to Posidonia from Montego 

 Bay, Jamaica, in 1912. In the Tortugas region it was found to be 



Figs. 7, 8. — Nubecularia antil- 

 larum, new species. 



7. Outline of a medium-sized 



specimen from above, show- 

 ing the miliolid young and 

 the later branching of the 

 chambers. 



8. Ventral view of a young 



specimen, showing the rela- 

 tion of the early chambers 

 and the beginning of the 

 branching. 



very abundant under similar conditions. It is perhaps most like 

 Nubecularia tuhulosa Heron-Allen and Earland (Trans. Zool. Soc. 

 London, vol. 20, 1915, p. 548, pi. 40, figs. 1 to 5), but it differs, 

 especially in the early development, their specimens showing a spiral 

 young, while in our specimens there is usually nothing more than a 



