FORAMINIFERA OF THE PHILIPPINE AND ADJACENT SEAS. 23 



The lack of certain species is perhaps to be based on the lack of 

 fineness of some of the material available, and if finer material had 

 been available in some cases undoubtedly numerous records for 

 smaller species would have been obtained. This is especially notice- 

 able in the case of small things, such as Lagena, Bolivina, etc., "which 

 from the work of others should be abundant in the region. 



Except for one or two stations in the Sulu Sea and in the region to 

 the southAvard most of the material came from depths of less than 

 1,000 fathoms (1,829 meters), and much of it from shallow water. 

 Some of the shallow water attached species of genera such as Poly- 

 trema, Homotrema, Sporadotrema, Carpenteria, etc., are undoubtedly 

 abundant, but the larger mollusca and corals to which they would 

 have been attached were not usually studied. Certain of these are 

 probably widely distributed in shallow, warm waters, and where 

 especially looked for were often found to be abundant. 



The general relations of the material to that from other regions 

 is interesting. The shallow water fauna, that inside of 30 fathoms 

 (55 meters), is characteristically tropical, most of the genera being 

 those of similar areas in the general Indo-Pacific region, but many of 

 the species being distinct. In such locations the foraminifera make 

 up a large proportion of the bottom samples. Such genera as 

 Calcarina, Baculogypsina, Siderolites, Operculina, PolystomeUa, Hete- 

 rostegina, Cycloclypeus, etc., as well as the Miliolidae, are abundant 

 under such conditions. 



There is an individuality to the fauna, however, which at once 

 separates it from that of the Barrier Eeef region of Australia or of 

 the shallow water of the Indian Ocean, as mU be noted under various 

 genera. 



In the somewhat deeper water, that from 100 to 300 fathoms 

 (183 to 549 meters), there is developed a fauna which is very inter- 

 esting and perhaps dominated largely by an exceptional development 

 of the Lagenidae. Nodosaria and Cristellaria are very abundant 

 and represented by numerous and well-developed species and varie- 

 ties, many of which are new. A good development of Frondicularia 

 is an interesting find in the region. This f airna is interesting in com- 

 parison wdth the material obtained by the ClmUenger in 95 fathoms 

 (173 meters), off Cebu. Some of the species which were described 

 by Brady from this station have been almost unknown since until 

 these Albatross dredgings were studied. These species have now 

 been found to be abundant and characteristic in many parts of the 

 Archipelago. 



In various parts of the region but especially in the colder, deeper 

 portions, there is an exceptional development of arenaceous forami- 

 nifera, especially Astrorhizidae and Lituolidae. These, even though 

 under the Equator, have the characteristic genera and many of the 



