FORAMINIFERA OF THE PHILIPPINE AND ADJACENT SEAS. 247 



CRISTELLAKIA DOKSO-COSTATA Cushman. 



Plate 48, figs. 3 a-c. 

 Cristellaria dorso-costata Cushman, Proc. U. S, Nat. Mus., vol. 51, 1917, p. 659. 



Description. — Test composed of numerous chambers, the early ones 

 close-coiled, the later ones becoming elongate and tending toward 

 uncoiling; test thick, periphery broadly rounded; sutures little de- 

 pressed; wall smooth except toward peripheral border, where there 

 are several rounded costae running lengthwise of the test, becoming 

 obsolete toward the later growth; aperture radiate. 



Length up to 3.5 mm. 



Distribution. — Type specimen (U.S.N.M. No. 9135) from Albatross 

 station D5268, in 170 fathoms (311 meters), off Batangas Bay. 

 Specimens also occurred in material from the following stations: 

 D5134, in 25 fathoms (46 meters), Sulu Archipelago near Basilan 

 Island; D5141, in 29 fathoms (53 meters); D5143, in 19 fathoms (35 

 meters); D5144, in 19 fathoms (35 meters), all off Jolo; D5147, 21 

 fathoms (39 meters), off Siasi; D5152, 34 fathoms (62 meters), off 

 Tawi Tawi; D5179, off Romblon, 37 fathoms (68 meters); and 

 D5218, 20 fathoms (37 meters) between Burias and Luzon. 



This seems to be a rather constant species and its characters of 

 ornamentation with its partially uncoiled form should make it easily 

 distinguished. Apparently it is found in the shallower, warmer 

 waters among the islands of the Archipelago from the data obtainable. 



Cristellaria dorsa-costata — Material examined. 



Locality. 



6 44 45 N. 

 6 09 00 N. 

 6 05 50 N. 

 6 05 50 N. 

 5 41 40 N. 

 5 22 55 N. 



12 38 15 N. 



13 11 15 N. 

 13 42 00 N. 



121 48 00 E. 



120 58 00 E. 



121 02 15 E. 



121 02 15 E. 

 120 47 10 E. 

 120 15 45 E. 



122 12 30 E. 



123 02 45 E. 

 120 57 15 E. 



repth 



in 

 fath- 

 oms. 



26 

 29 

 19 

 19 

 21 

 34 

 37 

 20 

 170 



Bot- 



t^ Character of 



ture. 



Abimdance. 



Rare. 



Few. 



Abundant. 



Few. 



Rare. 



Common. 



Rare. 



Rare. 



Rare. 



CRISTELLARIA COMPRESSA d'Orbigny. 



Cristellaria compressa d'Orbigny, Foram. Foss. Vienne, 1846, p. 86, pi. 3, figs. 32, 

 33.— H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 538, pi. 104, 

 figs. 15, 16. 



Description. — Test elongate, much compressed, early portion close- 

 coiled, later chambers becoming uncoiled and arcuate; sutures very 

 slightly if at all depressed, of clear shell material; periphery of the 

 test with a thin keel; aperture on the peripheral margin of the cham- 

 ber, radiate. 



