Manchester Memoirs, Vol. liv. (1910), No. 16. 19 



the trigonal form in which the keel is split, Fig. 11. There 

 is a single example which is four-sided and has a neck 

 produced. A very handsome variety (Fig. 10, PI. 2) 

 also occurs, but very rarely, which I have placed under 

 this heading on the advice of Mr. Millett, as the band 

 between the body of the test and the keel is unornamented, 

 otherwise it would be placed under L. forniosa, Schwager. 



Lagena lagenoides (Williamson) var. tennistriata, Brady. 



A few like those figured in the Delos paper. They 

 are very small. 



Lagena orbignyatia, Sequenza. (PI. 2, fig. 12, and fig. 13, 

 var.). 



Occurs in various forms besides the following. Fig. 12, 

 PI. 2 is trigonal. Fig. 13 is a pretty variation. 



Lagena orbignyana, var. ciathrata, Brady. 



Lagena orbignyana, var. variabilis, Wright. 



Lagena orbignyana, var. luamata. Burrows and Holland. 

 (PI. 2, fig. 14). 



Lagena orbignyana, var. walleriana. (PI. 2, fig. 15). 

 Very rare. 



Lagena finibriata, Brady. 

 Frequent. 



Lagena alveolata, Brady. 



They are like the Delos example of this species. 

 Very rare. 



Lagena excnlpta, Brady. (PL 2, fig, 16). 

 One example of the compressed form. 



Lagena protea. Chaster. (PI. 2, figs. 17, 18). 



Fine and varied specimens are on the slide. 



