HENRY SIDEBOTTOM ON LAGENAE OF THE SOUTH-WEST PACIFIC. 391 



quarters of the body is covered with irregular, more or less hexa- 

 gonal, net-work ; the upper portion between the four keels is 

 decorated with a few fine costae, A couple of spines project from, 

 the base. A single specimen only. Unfortunately I have lost it, 

 but my drawing of it was finished before this happened. The 

 specimen has the areolations much more extended over the surface 

 of the test than Jones's drawings indicate, otherwise it agrees well 

 "with his description. Locality : No. 17. 



Lagena stelligera Brady. (PI. 15, figs. 28, 29, and PI. 16, 



figs. 1-4). 



Lagena stelligera Brady, 1881, Quart. Journ. Micr. Set., vol. 21, 



N.S., p. 60. 

 Lagena stelligera Brady, 18S4, p. 466, pi. 57, figs. 35, 36. 



There is an extraordinary range of variation in this species, if I 

 am right in my diagnosis. About forty examples are on the slide, 

 besides twenty-five of the variety in which the costae at the base 

 are absent. PI. 15, fig. 28 is drawn from the largest one present, 

 and the tests pass insensibly into such forms as PI. 15, fig. 29 and 

 PL 16, fig. 1. There are examples somewhat similar to PI. 15, 

 fig. 29, showing the costae bridging the space at the lower part of 

 the body of the test. The variety without costae, PI. 16, fig. 2, 

 {the absence of which is referred to by Brady in the Challenger 

 Keport) is represented by both stouter and larger specimens than 

 the one figured, and also by more slender ones. Examples are 

 present that, if found by themselves, might pass for apiculate 

 (tubular) forms of L. semistriata or L. sulcata, and again others 

 might be placed with Z. gracilis. These I take to be intermediate 

 forms. 



PI. 16, fig. 1 approaches Z. gracilis, but there are forms 

 present in which the costae run the whole length of the test, and 

 the tubular, apiculate portion is more slender. In all cases the 

 apiculate process is tubular, and at times funnel-shaped. The 

 entosolenian tube is sometimes straight, sometimes attached to 

 the side of the test. In the larger specimens the tests are 

 opaque. Parker and Jones, 1865, pi. 16, fig. 9, figure a test 

 which in outline is similar to the " nude " form referred to above, 

 but I think they refer it to a " nude " form of L. cavdata 

 d'Orbigny. 



