FORAMIKIFERA OF THE PHILIPPINE AND ADJACENT SEAS. 481 



Genus PENEROPLIS Monffort, 1808. 



This genus occurs in numerous forms in the area, and the sam.e 

 arrangement as that adopted by Heron-Allen and Earland in their 

 paper on the Kerimba Archipelago is here adopted. Tho}-, having 

 made an extended study of the earlier figures and descriptions, have 

 given a very valuable series of notes on the systematic arrangement 

 of the forms of this genus. Their paper is here referred to so that 

 their disposition of the species may be followed. 



PENEROPLIS PERTUSUS (Forskdl). 



Nautilus -pertusus ForskAl, Descr. Anim., 1775, p. 125, No. 65. 

 • Feneroplis pertusus Jones, Parker, and H. B. Brady, Foram. Crag., 1865, p. 

 19.— H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 204, pi. 13, 

 figs. 'l6, 17. — Heron-Allen and Earland, Trans. Zool. Soc. London, vol. 20, 

 1915, p. 601.— Cushman. Bull. 71, U. S. Nat. Mus., pt. 6, 1917, p. 86, pi. 36, 

 fig. 1; pi. 37, figs. 1, 2, 6. 



This typical form of the species is not the most abundant in the 

 region. There are records from four stations: Sulu Archipelago ; off 

 Tawi Ta^\'i; between Burias and Luzon; and Midway Island. It 

 undoubtedly occurs, as do the other forms, in shallow water through- 

 out the region. 



Feneroplis pertusus — Material examined. 



PENEKOPLIS PLANATUS (Fichtel and Moll.) 



Nautilus (Lituus) arietinus (part) Batsch, Conch, des Seesandes, 1791, p. 4, 



pi. 6, figs. 15a, b. 

 Nautilus planatus, var. /3 Fichtel and Moll, Test. Micr., 1803, p. 91, pi. 16, 



figs. ld,e,/. 

 Feneroplis planatus d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 285, No. 1. — H. B. 



Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 204, pi. 13, fig. 15.— 



Heron-Allen and Earland, Trans. Zool. Soc. London, vol. 20, 1915, p. 601. 

 Feneroplis pertusus, var. planatus Cushman, Bull. 71, U. S. Nat. Mus., pt. 6, 1917, 



p. 87, pi. 37, fig. 3. 



Tliis is the most common form., being very abundant at a few of 

 the shallow-water stations, and occurring in lesser numbers than 

 others. The stations range in depth from 12 to 78 fathoms (22 to 

 143 meters), the average being about 30 fathoms (55 meters). Bot- 

 tom temperatures are not given. 

 182152—20 31 



