FORAMINIFERA OF THE PHILIPPINE AND ADJACENT SEAS. 389 



Description. — Test differing from the typical in the character of 

 the peripheral border, which is definitely thickened with a rounded 

 periphery. 



Chapman described this form as a variety of O. carinata, but in 

 the Philippines it has seemed to be much more closely allied to 

 C.foliacea. It occurs but once at the same station with C. carinata. 

 Chapman's original notes are as follows: 



In this variety the testa partake of the characters of both C. carinata Costa, sp., and 

 C. foliacea Philippi, sp. The test, although increasing rapidly in width, as in C. 

 fohacea, is, however, depressed on the sides, and even tends to become concave, as in 

 typical examples of C. carinata. The larger specimen of the varietal form has a diam- 

 eter of 1.23 mm. 



Forty miles south of Cape Wiles (South Australia, lat. 35° 35' S.; long. 135° 15' E.) 

 100 fathoms. Two examples, identical in varietal form. 



The variety has occurred in the Albatross Philippine material at 

 seven stations, ranging in depth from 135 to 700 fathoms (247 to 

 1,280 meters), the average 415 fathoms (759 meters). Bottom 

 temperatures given at four of these stations range from 49.3° F. to 

 59^ F. (9.6° C. to 15° C), the average 53.7° F. (12.1° C). The 

 localities include China Sea, off southern Luzon; off northwestern 

 Pan ay; east coast of Luzon; between Siquijor and Bohol Islands; 

 between Negros and Siquijor; and in the region southward it has 

 occurred south of Patiente Strait and off Bouro Island. 



This probably is a widely spread species in the Indo-Pacific region 

 in water of 100 fathoms (183 meters), or more from the various 

 records now known. 



CORNUSPIRA INVOLVENS Renss. 



Plate 77, figs. 3, 4. 



Operculina involvens Reuss, Denkschr. Akad. Wiss. Wien, vol. 1, 1849, p. 370, 



pi. 45, fig. 20. 

 Cornuspira involvens Reuss, Sitz. Akad. Wiss. Wien, vol. 48. 1863 (1864), p. 39, 



pi. 1, fig. 2.— H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, 



p. 200, pi. 11, figs. 1-3.— CusHMAN, Bull. 71, U. S. Nat. Mus., pt. 6, 1917, 



p. 25, pi. 1, fig. 2; pi. 2, fig. 2. 



This is by far the most common species of the genus in the region, 

 being widely distributed, but nowhere common. All the stations 



