FOEAMINIFERA OF THE PHILIPPINE AND ADJACENT SEAS. 61 

 Sagenina divaricans — Material examined. 



Subfamily Ammodiscinae. 



Genus AMMOLAGENA Elmer and Fickert, 1899. 



.\MMOLAGENA CLAV.\TA (Parker and Jones). 



Plate 6, figa. 1-4; plate 10, 



3,4. 



Trochammina irregularis, var. clavata Parker and Jones, Quart. Journ. Geol. 



Soc, vol. 16, 1860, p. 304. 

 Trochammina irregularis (part) W. B. Carpen'ter, Parker, and Jones, Introd. 



Study Foram., 1862, p. 142, pi. 11, fig. 6. 

 Webbimi clavata H. B. Brady, Proc. Roy. Soc. Edinburgh, vol. 11, 1882, p. 711; 



Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 349, pi. 41, figs. 12-16. 

 Ammolagena clavata Eimer and Fickert, Zeitschr. VViss. Zool., vol. 65, 1889, 



p. 673.— CusHMAN, Bull. 71, U. S. Nat. Mus., pt. 1, 1910, p. 68, figs. 86-89 



(in text); Bull. 104, U. S. Nat. Mus.. pt. 1, 1918, p. 89. pi. 34, figs. 2-5: pi. 35, 



figs. 1-3. 

 Webbinella clavata Rhtjmbi-er, Arch. Protistk., vol. 3. 1903. pt. 229, fig. 55 (in 



text). 



Both microspheric and megalospheric forms of this species liave 

 been obtained in this material, the m.icrospheric form having a 

 smaller but much longer tube than the megalospheric form; also the 

 megalospheric form is much more common. The attachment is 

 usually to smooth sm'faces or ones that are comparatively so. I 

 have noted its occurrence on the following genera: BhaMammina, 

 Ammodiscus, ReopJiax, Cyclammina, Ha'plojphragmoides, TrochaTn- 

 mina, Bulirnina, CristeJlaria, Pulvinulina, and Biloculina. It also 

 occurs on bits of shell and various foreign bodies. 



There is an interesting specimen from D5236, Pacific Ocean, east 

 coast of Mindanao, attached to a species of Quinqueloculina, which 

 apparently represents the first chamber only of A. clavata. This 

 has the appearance of Wehhinella hemisjjJiaerica, but at the edge is 

 a very small definite aperture. As A. clavata is common at this 

 station this may represent the young stage of tliis species which has 

 not yet developed the tubular chamber. 



