﻿12 SlDEBOTTOM, Foraminifera from the Island of Delos. 



state, should be able to perform its share of the process. 

 It is to be noted that some of the single specimens have 

 the mouth destroyed, in all cases leaving a comparatively 

 large circular orifice (PL 3, fig. 1). These probably are 

 individuals that have paired, and become separated, 

 either after the process of " Plastogamy " has been com- 

 pleted, or during the washing of the material. One test 

 has a " balloon " chamber entirely covering its mouth, as 

 shown in PL 3, fig. 2. This " balloon " is quite transparent, 

 and the orifice of the test can be clearly seen through it. 

 Very frequent. 



* Bulimina aculeata, d'Orbigny. 



Bulimina patagonica, d'Orbigny ('39), p. 50, pi. I, figs. 

 8, 9. 



Bulimina pupoides, var. spinnlosa, Williamson ('58), 

 p. 62, pi. 5, fig. 128. 



B. aculeata (d'Orb.), Brady ('84), p. 406, pi. 51, figs. 7-9. 



The Delos forms of this species agree best with 

 B. patagonica in the above reference, except that the test 

 is straight and not curved. Some of them approach 

 *B. echinata, d'Orbigny, as figured by Fornasini (:Ol), 

 pi. o, fig. 38. Rare. 



*Bulimina convoluta, var. nitida, Millett. (PL 3, fig. 3.) 

 Bulimina convoluta, var. nitida, Millett (:00), p. 280, 

 pi. 2, fig. 10. 



Mr. Millett in the above reference states : " This 

 variety is almost purely Rotaliform, the secondary series 

 of chambers being very small, and often scarcely dis- 

 cernible. The aperture, like that of the type, is situated 

 at the superior junction of the last added primary and 

 secondary chambers, and is usually a straight horizontal 



