Manchester Memoirs, Vol. liv. (1910), No. 10. 15 



Lagena lineata, Williamson, sp. 



Lagena variata, Brady. 



Lagena l(2vis, Montagu, sp. 

 Frequent. 



Lagena hevis, Montagu, van distoma, Silvestri. (Fl. i , fig. 1 2). 

 Both the globular and ovate forms are on the slide. 



Lagena lyellit, Sequenza, sp. (PI. i,figs. 13, 14, 15, 17, 18?). 

 These range from the nearly globular form to the 

 ovate, and are frequent ; they nearly all have the neck 

 decorated and a phialine lip. 



Lagena striata, d'Orbigny, sp. (PI. i, figs. 16, 19, 20, PI. 2, 



fig- 0- 



Besides the oval form, there are elongate (frequent), 

 and two or three somewhat club-shaped forms 



I would here draw particular attention to the fine 

 " clusters " of Lagena found at this locality. They are 

 apparently composed of L. lyellii, L. striata and L. sevii- 

 striata. The lower portion of their tests springs from an 

 irregular chamber and is not embedded in it, the bases of 

 the L^agena being part of the irregular chamber. This 

 chamber is marked more or less by broken-up costae, and 

 small blunt spines or tubercles, and often has several 

 orifices besides the one that opens into the body of the 

 Lagena, which sometimes has three necks. The orifices 

 of the irregular chamber are, I think, simply nipples. 

 It looks as if this irregular chamber were the parent one. 

 In Fig. I, PI. 2, it will be noticed that one of the tests is 

 smaller than the other two, and has a short neck with 

 everted lip. Would it have expanded its test, and 

 increased the length of its neck as the others have done ? 

 The lowest test in this figure has its chief neck snapped 



