14 



Indiana University Studies 



The table below shows the form of successive stages as seen in axial 

 section : 



Chambers 



Width. Length. Ratio. in Whorl. 



Whorl 1 35 .6 1:1.7 14 



Whorl 2 5 1.5 1:2.5 22 



Whorl 3 9 2.75 1:3.05 24 



Whorl 4 1.3 5. 1:3.85 27 



Whorl 5 1.88 8.25 1:4.4 29 



Whorl 6 2.45 10.25 1:4.18 31 + 



Thickness of opaque layer .026 mm. to .016 mm.; punctate layer .056 

 mm. to .079 mm.; wall in central region about .09 mm. 

 Base of Elmdale formation; Foraker, Oklahoma. 



This species differs from F. longissima mainly in the finer and more com- 

 plicated structure of the vesicular region. 



Fusulina emaciata n.sp. 



Shell long and slender, somewhat elliptical in outhne, ends somewhat 

 blunt. The septa are highly fluted thruout, tho possibly a little less deeply 

 so in the central region. Seen in axial section the walls diverge notably 

 toward the ends of the shell. The chambers in the first four of the six or 

 S9ven whorls run 12, 18, 21 23, or 24, respectively. Developmental statistics 

 are as follows, a^ seen in axial section: 



Width. Length. Ratio. 



Whorl 1 225 .3 1:1.33 



Whorl 2 375 .7 1:1.80 



Whorl 3 575 1.4 1:2.44 



Whorl 4 95 2.7 1:2.8 



Whorl 5 1.4 3.6 1:2.57 



Whorl 6 2.025 5.6 1:2.76 



Whorl 7 Incomplete 7.15 1 :3 . 18 



Primordial chamber large, .1 mm. in diameter; thickness of the wall, fifth 

 whorl, .066 mm.; opaque layer .016 mm.; punctate layer .049 mm. 

 Florena Shales; Grand Summit, Kansas. 



This species is strikingly like F. longissimoidea, but is smaller, of somewhat 

 different form, showing a different development not due to dimorphism, 

 and is from a higher horizon. 



Girtyina haworthi n.sp. 



Shell small, fusiform. Walls very thin and diverge markedly toward 

 the ends, when seen in axial section. They possess an outer and an inner 

 opaque layer, instead of a single one. The punctate layer is not punctate, 

 but a very thin layer of more translucent material than the material on 

 either side of it. The septa are well fluted thruout. The walls are .03 to 

 .05 mm. in thickness. At its very thickest, the translucent layer is .0166 

 mm. The opaque layers are distributed about equally on either side of it. 



