480 BUUL-ETIN 100, UNITED STATES NATIONAL MUSEUM. 



Genus NEVILLINA Sidebottom, 1905. 



Nevillina Sidebottom {Type N. coronata (Millett)), Mem. Proc. Manchester Lit. 

 Philos. Soc, vol. 49, pt. 2, No. 11, 1905, p. 1.— Cusiiman, Bull. 71, U. S. Nat. 

 Mus., pt. 6, 1917, p. 83. 

 This very interesting genus has been discussed at some length in 

 the references given above. 



NEVILLINA CORONATA (Miilett). 



Plate 99, figs, la, b. 



Biloculina coronata Millett, Joiirn. Roy. Micr. Soc, 1898, p. 263, pi. 6, figa. 



6a-c. 

 Nevillina coronata Sidebottom, Mem. Proc. Manchester Lit. Philos. Soc, vol. 49, 



pt. 2, No. 11, 1905, p. 1, figs. 1-8.— CusHMAN, Bull. 71, U. S. Nat. Mus., pt. 6, 



1917, p. 84, pi. 35, figs. 2-5. 



Some of the relationships of this very interesting genus and species 

 have already been noted ^^ The species was originally discovered 

 and described by Millett from a solitary specimen from "Asjahan, 

 northeast coast of Sumatra," depth not given. Millett's specimen 

 was evidently not adult, but still in the biloculine stage. Later 

 Sidebottom described the genus Nevillina from more adequate mate- 

 rial from two stations — Port Blair, east side of Andaman Island, at 

 entrance to the port, between Ross Island and the main island in 

 16 fathoms (29 meters) ; and Sulu roadstead, 12 fathoms (22 meters). 

 These two stations with that of Millett show that the species must 

 have a wide distribution in the Indo-Pacific. 



In the Philippine material it is very rare. A single apertural end 

 of a fully developed specimen is from D5142, off Jolo, in 21 fathoms 

 (39 meters) ; and two specimens, also fully mature and very typical, 

 from D5160, off Tinakta Island, Sulu Archipelago, Tawi Tawi Group, 

 in 12 fathoms (22 meters). 



When sufficient material of this species can be obtained the early 

 development of the microspheric form should be studied and com- 

 pared with the sections figured by Schlumberger of the genera Idalina 

 and Periloculina. 



This is evidently one of the most interesting Foraminifera of the 

 region, representing a species with Cretaceous affinites still existing 

 in the Indo-Pacific region. 



Nevillina coronata — Material examined. 



w Cushman,1917, pp. 83.84. 



