BY H. I. JENSEN. 821 



Subfamily TINOPORINJE. 



76. TiNOPORUS BACULATUS, Carpenter; C.R.,pl.ci. f.4-7; very rare. 



77. POLYTREMA MINIACEUM, Liniie. 



Neio Species and Xotes. 



Rheophax euneta,* n.sp. (Pl.xxiii., figs.5-7a and h). 



Only three fair specimens were obtained. The tests being very 

 frail had been demolished through crushing. The test consists of 

 a closely matted network of spicules which, being insoluble in 

 hydrochloric acid, somewhat boomerang-shaped, and containing 

 axial canals, seem to be siliceous spicules of monactinellid 

 sponges (fig. 6). The tests of the specimens described were of a 

 light brown colour and were made up of three or four chambers 

 placed in a straight line, the tirst (or initial) chamber sometimes 

 being the largest (fig. 5). The chambers are hollow and connected 

 with one another by wide openings. The total length of the test 

 varies from 3-4 mm., and the width is about 1 mm. The speci- 

 men shown in fig. .5 measured 4 mm. in length. The closed 

 initial chamber was If mm. long, the second f, the third i, and 

 the fourth li mm. The chambers are barrel-shaped. The organ- 

 ism differs from the genus Technitella in the reddish colour of the 

 material cementing the spicules of the test, and in possessing 

 more than one chamber. In these points it agrees with the genus 

 Rheophax, as well as in building up its test with foreign particles. 

 The close matting of the spicules is, however, as beautiful and 

 perfect as in Technitella. 



POLYMORPHINA ALVEOLINIFORMIS, n.Sp. (Pl.Xxiii.. figS.8-12.) 



Length 3-6 mm.; width about 1mm. Colour yellowish-white 

 like that of some large Cristellarias with which it is associated; 

 aperture polymorphine (multiradiate), in some specimens tri- 

 angular or circular and not showing the radiating grooves dis- 

 tinctly; generally three chambers show on the surface, sometimes 



'evvrjTos, well spun. 



