MILIOLIDAE — NODOBACULARIA; FISCHERINA. 59 



proloculum and second Cornuspira-like chamber which is found 

 throughout the early stages of the Miliolidse, from which the irregu- 

 lar tubes are developed. These tubes are broad and flattened, and 

 may reach to a considerable extent, at least several millimeters. 

 Specimens were found in all stages of development, especially on the 

 newer portion of the leaves of Posidonia. It is usually one of the first 

 organisms to be attached to the leaf, and its growth must be rapid. 



Genus NODOBACULARIA Rhumbler, 1895. 



Nodobacularia tibia (Jones and Parker). 



(Plate 11, Figure 1.) 



Nvbecularia tibia Jones and Parker, Quart. Journ. Geol. Soc, vol. 16, 1860, p. 455, pi. 20, 

 figs. 48 to 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 to 4. 



Nodobacularia tibia Cushman, Bull. 71, U. S. Nat. Mus., pt. 6, 1917, p. 39, pi. 8. figs. 1, 2. 



The only specimen of N. tibia is a fragmentary one, showing the 

 last two chambers with the aperture. The chambers, however, seem 

 to be typical and show the occurrence of the species in this region. 



Genus FISCHERINA Terquem, 1878. 

 Fischerina dubia (d'Orbigny). 



(Plate 10, Figures 6, 7.) 



Rotalina dubia d'Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 1839, " Foraminif^rea," 

 p. 91, pi. 2, figs. 29, 30; pi. 3, fig. 1. 



Test composed of a few coils, the early portion undivided, the last-formed 

 coil divided into 4 or 5 chambers, all visible from the dorsal side, from the 

 ventral only those of the last-formed coil visible, as the chambers extend into 

 the middle at the umbihcal region; ventral side somewhat concave, dorsal side 

 convex; sutures distinct; wall thin and translucent; aperture at the end of 

 the last-formed chamber, usually circular. 



Diameter of the Tortugas specimens up to 0.30 mm. 



Recent specimens of Fischerina seem to be limited mainly to the 

 Indo-Pacific. A comparison of d'Orbigny's figures in the Cuban 

 monograph will show that his Rotalina dubia really belongs to 

 Fischerina and, allowing for reasonable differences in the figures, 

 our specimens from the Tortugas are undoubtedly the same as those 

 d'Orbigny had from the shore sands of Cuba and Jamaica. D'Or- 

 bigny's specimens evidently did not show the aperture, as his figure 

 does not show this feature and his description refers to it with a 

 question mark. From the ventral side Fischerina dubia is nearest 

 to F. helix Heron-Allen and Earland, which they described from the 

 Kerimba Archipelago. It is not common at the Tortugas. 



Genus SPIROLOCULINA d'Orbigny, 1826. 

 Spiroloculina grateloupi d'Orbigny. 

 Spiroloculina grateloupi d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 298. — Terquem, M6m. 

 Soc. G6ol. France, ser. 3, vol. 1. 1878, p. 52, pi. 5, figs. 5, 6.— Wiesner, Arch. Prot., 

 vol. 25, 1912, p. 208.— Cushman, Bull. 71, U. S. Nat. Mus., pt. 6, 1917, p. 31, 

 pi. 4, figs. 4, 5; Proc. U. S. Nat. Mus., vol. 56, 1919, p. 634; Bull. 100, U. S. Nat. 

 Mus., vol. 4, 1921, p. 396, pi. 78, figs. 4 a, 6; pi. 100. fig. 3; figs. 17, 18 (in text). 

 Spiroloculina excavata H. B. Brady (not d'Orbigny), Rep. Voy. Challenger, Zoology, vol. 9, 

 1884, p. 151, pi. 9, figs. 5, 6. 



