FORAMINIFEEA OF THE NORTH PACIFIC OCEAN. 



69 



TRILOCULINA OBLONGA (Montagu). 



Plate 26, fig. 3. 



Vermiculum oblongum Montagu, Test. Brit., 1903, p. 522, pi. 14, fig. 9. 

 Triloculina oblonga D'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 300, No. 16; 



Modeles, No. 95; in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 1839, "Foramini- 



feres," p. 155, pi. 10, figs. 3-5. 

 Miliolina oblonga H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 



160, pi. 5, fig. 4a, 6.— Bagg, Proc. U. S. Nat. Mus., vol. 34, 1908, p. 121. 



Description. — Test elongate, 

 the adult with three visible 

 chambers, last formed chamber 

 broadest near the initial end and 

 longer than the preceding ones ; 

 test in end view triangular, the 

 angles broadly curved, chambers 

 tumid, sutures distinct; wall 

 smooth and unornamented ; 

 aperture oval with the tooth 

 simple or narrow and bifid at 

 the tip. 



Length, usually less than 

 1 mm. 



Distribution. — Brady has two Challenger records of this species 

 from the North Pacific, 260A, in 40 fathons, coral reefs of Honolulu, 

 Hawaiian Islands, and 244 in 2,900 fathoms. Bagg records it at one 

 station, Albatross, D4000 in 104 to 213 fathoms off the Hawaiian 



Fig. 35.— Triloculina oblonga d'Orbignt. X25. 

 Outline of chambers of specimen from "Nero" 

 2071 ln 271 fathoms off the Hawahan Islands. 







Fig. 36.— Triloculina oblonga d'Orbignt. X100. Much smaller specimen than that shown in 



FIG. 35, FROM THE SAME STATION, BUT THE TRLLOCULLNE CHARACTERS FULLY DEVELOPED. 



Islands. The material I have had is distributed as follows: Several 

 Albatross and Nero stations in the vicinity of the Hawaiian Islands, 

 Nero station 1466 in 234 fathoms off Guam, and Tuscarora material 

 from Manila Bay, Philippine Islands- 



