406 HENRY SIDEBOTTOM ON LAGENAE OF THE SOUTH-WEST PAClflCV 



PI. 17, fig. 29. There are only two of these. Four others 

 have the body of the test more elongate. I have unfortunately 

 broken the one from which the illustration was drawn. Locality r 

 Exact stations uncertain. 



PI. 17, fig. 30. In this elegant form the keel is continuous 

 round the body. In nearly all cases the carina is bent back- 

 wards that is, if one considers the orifice as opening out on the 

 face of the test. The entosolenian tube is attached to the back 

 of the test, which is much more convex than the face. It may be 

 related to L. marginata Walker and Jacob var. inaequilateralis 

 Wright, 1884-5, app. 1886, pi. 26, fig. 10, but the keel is much 

 more developed, and the orifice is a simple opening and of an 

 entirely different character. Locality : Chiefly at Nos. 11, 14. 



^ote. A curious feature of the entosolenian tube in this 

 variety, which I have not noticed before, is that it is only half a 

 tube, if one may use the expression, with its edges attached to the 

 wall of the test, part of the wall thus helping to form the tube. 

 This peculiarity is best seen when viewed from the back. My 

 attention was drawn to this feature by one of the specimens 

 having the internal opening of its tube of specially large size and 

 arched instead of circular. On further examination it was 

 accounted for in the way I have explained above. I do not 

 know if this peculiarity has been noticed before, but after 

 examining further I find it is not limited to this particular 

 variety. 



PI. 17, fig. 31. An elongate form. Tube attached. Orifice 

 compressed, the front edge lower than the back. Locality ; 

 Nos. 18, 19, and a few others. Always rare. 



PI. 18, fig. 1. This foraminifer appears to be closely allied to 

 the L. seguenziana Fornasini, 1886, pi. 8, figs. 1-8. Unless it is 

 viewed edgeways the exact contour of the test may easily be 

 overlooked. Only one occurs. Locality : Probably No. 1. 



PI. 18, fig. 2. This is an exceedingly large specimen. The 

 keel has the appearance of being composed of two layers, but I 

 believe this is not so. The central body is highly convex and is 

 badly fractured on one side. One only found. Locality : No. 28^ 



PI. 18, fig. 3. The test is a good deal compressed and has a 

 broad, semi-opaque band running round it on either side, adjoin- 

 ing the carina. The carina is a true one and of clearer shell- 

 substance than the body of the test. On the Chart, three 



