476 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



Biloculina piaum — Material examined. 



BILOCULINA DENTICULATA (H. B. Brady). 



Plate 98, J5gs. 3a, b. 



BiloculiTiaringens (Lamsiick), var. denticulata H. B. Brady, Rep. Voy. Challenger, 



Zoology, vol. 9, 1884, p. 143, pi. 3, figs. 4, 5. 

 Biloculina denticulata Cushman, Bull. 71, U. S. Nat. Mus., pt. 6, 1917, p. 80, pi. 



33, fig. 1. 



This species, which was described by Brady as a variety of Biloc- 

 ulina ringens, I placed as a definite species (reference above). 



It is evidently a shallow-water, tropical species, in its best develop- 

 ment in the Indo-Pacific region, where it occurs from the Hawaiian 

 Islands, west to the Indian Ocean. 



In the Philippines it has occurred at 11 stations, all in shallow 

 water, ranging in depth from 10 to 100 fathoms (18 to 183 meters), 

 the average depth 33 fathoms (60 meters). The bottom tempera, 

 ure is given at but one of these stations, that from 37 fathoms- 

 (68 meters), where it is 75.7° F. (24.2 °C.), showing that all the 

 records for this species, except perhaps that one at 100 fathoms 

 (183 meters), are in warm waters. 



At the one station D5179, off Romblon in 37 fathoms (68 metei-s), 

 it is very abundant. 



Biloculina denticulata — Material examined. 



Cat. 

 No. 



13466 

 15781 



13468 

 15782 

 13470 

 13465 

 15783 

 13469 

 13467 

 13157 



Coll. of— 



U.S.N.M. 

 U.S.N.M. 



U.S.N.M. 

 U.S.N.M. 

 U.S.N.M. 

 U.S.N.M. 

 U.S.N.M. 

 U.S.N.M. 

 U.S.N.M. 

 U.S.N.M. 



No. Of 



speci- Station. 



mens.] 



10-1- 

 1 



D5134 .. 

 D5138... 

 D5141... 

 D5159... 

 D5161... 

 D5179... 

 D5218... 

 D5255... 

 D5342... 



Locality. 



6 44 45 N. 

 6 06 00 N. 



6 09 00 N. 

 5 U 50 N. 

 5 10 15 N. 



12 38 15 N. 



13 11 15 N. 



7 03 00 N. 

 10 56 55 N. 

 JoloJolo, P. I.... 

 Apra Bay, Guam 



121 48 

 120 58 

 120 58 

 119 54 

 119 53 



122 12 



123 02 

 125 39 

 119 17 



00 E. 

 50 E. 

 00 E. 

 00 E. 

 00 E. 

 30 E. 

 45 E. 

 00 E. 

 24 E. 



Depth 



in 

 fath- 

 oms. 



25 

 19 

 29 

 10 

 16 

 37 

 20 

 100 

 14-25 



Bot- 

 tom 

 tem- 

 pera- 

 ture. 



Character of 

 bottom. 



75.7 



fne. s . 

 s., Co . 



CO. s . . 

 CO. s.. 

 fae. s . 

 hrd.s. 

 crs.s.. 

 sft. m . 

 gy.m. 



Abundance. 



Common. 



Rare. 



Rare. 



Common. 



Rare. 



Abundant. 



Common. 



Rare. 



Rare. 



Frequent. 



Few. 



