456 



BUT J .F.TIN 100, UNITED STATES NATIONAL MUSEUM. 



TRILOCULINA TRICARINATA d'Orblgnj. var. CONVEXA, new variety. 



Description. — Variety differing from the typical in the shorter test 

 and the convex sides. 



This is constant in its characters at several sta- 

 tions as follows: D5133, Sulu Sea off western Min- 

 danao; D5144, vicinity of Jolo, D5145, the neighbor- 

 ing station; D5268, Verde Island Passage; D5277, 

 China Sea, off southern Luzon; and D5576, north 

 of Tawi Tawi, 



^™™!r'X'- With two exceptions, D5268 and D5576, the 



BiGNT. apeetueai. statlous are in less than 100 fathoms (183 me- 



albateoss station ters), ranging from 19 to 80 fathoms (35 to 146 



^^^^^- meters). The bottom temperatiu-e was recorded 



in two cases only, D5277, 58.6° F. (14.7° C), and D5576, 53.5° F. 



(11.8° C). 



Triloculina tricorinata, var. conxexa — Material examined. 



TRILOCULINA TRICARINATA, var. PLICATA Terquem. 



Triloculina plicata Terquem, M6in. Soc. geol. France, ser. 3, vol. 1, p. 61, 



pi. 6 (11), fig. 2. 

 Miliolina tricarinata, var. plicata Heron-Allen and Earland, Trans. Zool. Soc. 



London, vol. 20, 1915, p. 562, pi. 41, figs. 17-22. 



There are rare specimens at two stations — D5160, Sulu Archi- 

 pelago, off Tawi Tawi, 12 fathoms (22 meters), and D5236, Pacific 

 Ocean, off the east coast of Mindanao, 494 fathoms (903 meters), 

 which can be referred to this species. 



As figured by Terquem and Heron-Allen and Earland, this is 

 rather short, chambers with very decided extended edges, and the 

 chambers often separated by deep clefts. 



Terquem's material was from the Pliocene, of the Isle of Rhodes ; 

 Heron-Allen and Earland's from the Kerimba Archipelago. 



