Manchester Memoirs, Vol. li. (1907), No. % 13 



The solitary specimen found is not so neat as the one 

 figured by d'Orbigny, the costse are also not so distinct, 

 but it answers very well to the description of the species. 



*Polymorphina compressa, d'Orbigny. (PI. 3, figs. 1-6, 



12, 13). 



Polymorphina compressa, d'Orbigny f'46), p. 223, pi. 12, 

 figs. 32-34. 



P. compressa (d'Orb.), Goes ('94), p. 58, pi. 10, figs. 



539-553- 



P. compressa (d'Orb.), Flint ('99), p. 319, pi. 67, fig. 3. 



This species is more abundant than any other of this 

 genus, and it varies in size from the large thick-shelled 

 variety, such as figs. 1, 2, down to the small, smooth, thin, 

 transparent forms with entosolenian tube as in figs. 5, 6. 

 The majority of them approach in character the specimen 

 represented by fig. 3. * About 10 are in the fistulose 

 condition. Very frequent. 



Polymorphina myristiformis, Williamson. (PI. 3, fig. 7.) 



Polymorphina myristiformis, Williamson ('58), p. 7 2 > 

 pi. 6, figs. 156, 157. 



P. myristiformis (Williamson), Brady, Parker and 

 Jones ('70), p. 240, pi. 41, fig. 30. 



The ornamentation of this pretty foraminifer varies 

 considerably ; in some the lower half of the test is inclined 

 to be tubercular, while the upper half has interrupted 

 costae. These costse are sometimes strong as in the 

 example figured, and sometimes very faint. A few of 

 the Delos specimens approach Karrer's P. ornata ('68), 

 p. 175, pi. 4, fig. 10, both in the shape of the test and in 

 the markings. Rather rare. 



