72 SHALLOW-WATER FORAMINIFERA OF TORTUGAS REGION. 



Test much compressed, the very earliest ones mihoUne, later ones becoming 

 spirolocuhne, and finally, in the last -formed coil, more than 2 chambers 

 appear, usually 3 makinp; up a complete coil; wall very finely striate-reticu- 

 late; periphery rounded or subearinate; aperture a sieve-plate the entire 

 height of the chamber, curved, with numerous pores. 



Diameter of the Tortugas specimens not exceeding 0.60 mm. 



This species has occurred at a number of stations, but usually as 

 very few specimens. These are smaller and more delicate than those 

 usually found in the Indo-Pacific, but have the same general char- 

 acters. I have previously recorded it from the north coast of 

 Jamaica, from the Tortugas, and elsewhere in the Gulf of Mexico. 



Hauerina omatissima (Karrer). 



Quinqueloculina ornalissiina Karrer, Sitz. Akad. Wiss. Wien, vol. 58, 1868, p. 151, pi. 3, fig. 2. 

 Hauerina ornaliasima H. B. Brady, Rep. Voy. Challenoer, Zoology, vol. 9, 1884, p. 192, 



pi. 7, figs. 15 to 22.— Cushman, Bull. 71, U. S. Nat. Mus., pt. 6, 1917, p. 63, pi. 23, 



figs. 1, 5; Proc. U. S. Nat. Mus.. vol. 59, 1921, p. 72. 



This species occurs as single specimens at a few stations. The 

 specimens are characteristic and similar to those which I found in 

 the collection from the north coast of Jamaica. Most of the other 

 records for it are from the Indo-Pacific, and it is one of the striking 

 species which connects that area with the West Indian region. 



Genus TRILOCULINA d'Orbigny, 1826. 



Triloculina trigonula (Lamarck). 



Miliolites trigonula Lamarck, Ann. du Mus., vol. 5, 1804, p. 351, No. 3. 



Triloculina trigonula d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 299, No. 1, pi. 16, figs. 



5 to 9; Modules, 1826, No. 93.— Cushman, Bull. 71, U. S. Nat. Mus., pt. 6, 1917, 



p. 65, pi. 25, fig. 3; Proc. U. S. Nat. Mus., vol. 59, 1921, p. 69. 

 Miliolina trigonula Williamson, Rec. Foram. Great Britain, 1858, p. 83, pi. 7, figs. 180 to 



182.— H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 164, pi. 3, 



figs. 14 to 16. 



The Tortugas specimens referred to this species are somewhat longer than 

 broad, have the outer angle of the chamber convex, and the sides broadly 

 rounded, the tooth projecting above the aperture somewhat, and the surface 

 very smooth and polished, with a brilliant luster. 



The largest specimens measure nearly 1 mm. 



Such specimens are found at a number of stations, but not usually 

 in great numbers. I have already recorded this species from the 

 north coast of Jamaica, in shallow water, but there again only as 

 single specimens from the three stations at which it occurred. 



Triloculina tricarinata d'Orbigny. 



Triloculina tricarinata d'Orbigny, Ann. Sci. Nat., vol. 7. 1826, p. 299, No. 7; ModMea, 



1826, No. 94.— H. B. Brady, Trans. Linn. Soc. London, vol. 24, 1864, p. 446, pi. 



48, fig. 3.— Cushman, Bull. 71, U. S. Nat. Mus., pt. 6, 1917, p. 66, pi. 25, figs. 1, 2; 



fig. 32 (in text). 

 Miliolina tricarinata H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 165, pi. 3, 



figs. 17 a, b. 



There are a very few specimens which can be referred to T. tri- 

 carinata, and these are not of the typical form which is found in 

 deeper water. They are more like some of the varieties which I 

 have noted from shallower water in the Philippines. 



