Manchester Memoirs, ]''ol. I. (1906), No. 5. 5 



'''Lagena hexagona, Williamson, sp. 



Entosoknia squamosa, var. Jiexagona, Williamson ('48;, 

 p. 20, pi. 2, fig. 23. 



Entosolenia squamosa, var. hexagona, Williamson, ('58), 

 p. 13, pi. I, fig. 32. 



Entosolenia squamosa, var. scalar if ormis, Williamson 

 ('•58), p. 13, pi. I, fig. 30. 



Lagena favosa, Reuss ('62), p. 334, pi. 5, figs. 72, 77,. 



L. geometrica, Reuss ('62), p. 334, pi. 5, fig. 74. 



L. hexagona (Williamson), Brady ('84), p. 472, pi. 58, 

 figs. 32, IZ- 



The Delos examples of this elegant foraminifer vary 

 considerably, both as to the size of the hexagonal 

 markings and the shape of the test. Frequent. 



*A variety is present which has an elongate and 

 tapering test, terminating in a short neck. This form is 

 the smallest of the variations. Very rare. 



*Lagena laevigata, Reuss, sp. (PI. i, fig. 6.) 



Fissurina laevigata, Reuss ('50), p. 366, pi. 46. fig. I. 



Lagena laevigata (Reuss), Balkvvill and Millett ('84), 

 p. 80, pi. 2, fig. 6. 



L. laevigata (Reuss), Brady ('84), p. 473, pi. 1 14, fig. 8. 



Several varieties of this common species are present, 

 and the orifices vary. In some cases the orifice is merel)- 

 a short slit on the median line, in others the apertural end 

 is slightly produced, and the mouth shows itself at one 

 side of the median line. 



*The form figured has a short neck and the usual 

 entosolenian tube. In all the varieties there is a very 

 small ring at the aboral end, and where this projects a 

 little, as it does in most cases, they approach L. acuta, 

 Reuss. Frequent. 



