208 ANNALS NEW YORK ACADEMY OF SCIENCES 



Septopora pustulifera sp. nov. 



Zoarium probably small, very irregular in growth. Four rows of fenestrules 

 and o branches to 4 rows and 5 branches, occur in 5 mm. Three and one half 

 to 4 fenestrules occur in the same distance longitudinally. The branches and 

 dissepiments are usually about equal in size, both more or "less expanded at 

 their juncture. Fenestrules subquadrate to subcircular, irregular in size and 

 shape. Dissepiments sometimes oblique, sometimes forming zigzag lines, 

 rarely meeting in an angular or curved figure, as is rather characteristic of 

 the genus. On the obverse, the zocecia are in two rows separated by a carina 

 (?), and the dissepiments also show two rows. The reverse is marked by 

 rather numerous, large, conspicuous pustules or accessoi-y pores. These often 

 look like spines which have been broken off, but probably are crater-like 

 openings with raised edges. There are also (in one specimen) smaller pointed 

 elevations like low papilLne. Lir?e are likewise present, bi:t they are discon- 

 tinuous. Infrequently a median lira is found, which causes the back to have 

 a more or less carinated appearance, while there are finer, less persistent lime 

 lateral to it. The pustules occur on both branches and dissepiments, but the 

 lirse appear to be restricted to the branches. 



Rhombopora persimilis var. miseri var. nov. 



Zoarium ramose, bifurcating at frequent but irregular intervals. Branches 

 about 1.5 mm. in diameter. Apertures regularly arranged in longitudinal and 

 oblique rows of which there are about 16 lengthwise aroimd the stem. The 

 oblique series intersect at angles of about 30° longitudinally and 60° trans- 

 versely. The apertures are strongly elongated and separated by thick angular 

 walls. Longitudinally, 4 apertures occur in a distance of 2 mm. One or two 

 large tubercles are developed in the long distance which separates the top of 

 one aperture from the bottom of the one above in the longitudinal series, 

 and a row of smaller spinules occupies the crests of the dividing ridges 

 laterally. 



This form is known chiefly from thin sections, and such statements as 

 relate to superficial appearance are based upon few observations. In 

 transverse sections, the thickened portion seems to be narrow, often not 

 more than one sixth or one eighth of the whole at either end of a 

 diameter. The bounding ridges appear as elliptical bodies with their 

 long axes in a radial direction when the section cuts through a cell. 

 "V^Tien it passes between two cells, the thickenings of course coalesce, and 

 when it passes through a spinule, it terminates in a strongly projecting 

 point. Each thickened mass shows a median line of darker color which 

 has of course a radial direction. 



None of the longitudinal sections examined probably passes quite 

 through the middle of a branch. The blocks of thickened tissue have a 

 rectangular shape and are much longer than in the transverse section, 

 but they are somewhat similarly modified as they cut different portions 

 of the zoarium. The zocecial tubes are without tabulae. 



