HENRY SIDEBOTTOM ON LAGENAE OF THE SOUTH-WEST PACIFIC. 195 



The edges of the band are just raised above the surface, and the 

 space between is roughened. It will be noticed, by reference to 

 the Challenger figure, pi. 60, fig. 1, that there is a ridge, or minor 

 keel, between the side keel and the central one, and I take my 

 specimens to be in the same condition, only the inner ridge is 

 quite close to the central keel. The body of the test is finely 

 pitted all over. The aperture is large, compressed and lipped. 

 In two cases the keel is serrated all round, but it is doubtful if 

 this is natural. The tube is attached. Frequent. Locality : 

 Nos. 42, 43. 



Lagena Orbignyana Seguenza sp. var. Walleriana Wright. 



Lagena Orbignyana sp. var. Walleriana Wright, 1886, Proc. JR. Irish 

 Acad., ser. 2, vol. iv., p. 611, and 1891, p. 481, p. 20, fig. 8. 



In all the specimens the typical boss is replaced by a ring, 

 which is very slightly raised. Locality: Nos. 2, 22, and one or 

 more of the three stations, Nos. 42-44. 



Lagena Orbignyana Seguenza sp. var. unicostata Sidebottom. 



Lagena Orbignyana Seguenza sp. var. unicostata Sidebottom, 

 1912, Journ. Q. M. C, p. 417, pi. 19, fig. 22. 



The single costa in this case runs the whole length of the body 

 of the test. Very rare. Locality ; Nos. 18, 22. 



Lagena Orbignyana Seguenza sp. var. pulchella Brady 



(PI. 17, fig. 13). 



Lagena pulchella Brady, 1866, Rept. Brit. Assoc. (Nottingham), 



p. 70. 

 Lagena pulchella Brady, Annals and Mag. Nat. Hist., 1870, p. 294, 



pi. 12, fig. 1. 



The largest specimens are very similar to L. Orbignyana var. 

 variabilis Wright, 1891, pi. 20, fig. 9, but the costae are irregular 

 and cover the whole of the body of the test ; sometimes there is 

 a fine ridge showing between the main keel and the side keels. 

 Very rare. Locality : Uncertain. 



A smaller set is frequent, with few and irregular costae. The 

 side keels amount to little more than slight ridges. Locality : 

 No. 44. 



