Th© description of th© Jama loan specimen , whm taken in con- 
nection with th© notes of Pouriale® , gives a good 44©* of th© os- 
teat of the variation of th® species except la on© -particular* that 
of th© septal arrangement. Th® normal, fully developed calls®® have 
four complete cycle© of §©pta; however* sometime® th© fourth cycle 
may not rbe aomplet® while at others there may he a few qttinarie®. 
In the recant ape oi mans the tsrtiariea usually, but not invariably, 
extend to th© eolurasXl&j in th® fossil specimens from Tampa, 71a. , 
Bai abridge , to*, etc*, th® primaries, so a© or all of tha secondaries* 
and occasionally sera® terti&ria© reach th© columella. In the recent 
material th© rule is for ©very other sepia®, in the Olfgocen© fossils 
for ©very third septum to reach th© columella j but in so m recent 
specimens th© tartiari®© are shorter than the secondaries, and in som® 
of the fossils th® teriiaries may equal th© primaries and secondaries 
in length, thus showing that there is intergradatioa between the two 
plan® of septal arrangement. 
The characters common to all of th© specimens may be briefly sum- 
marised a® follows* 
Co ml lum- massive, base epithecate, upper surface flat, irregularly 
convex or domed. Calicos more or less elevated, diameter from b to IX 
mm., externally co state* Septa normally in four complete cycle©, but 
the fourth may not be complete, and sometimes there my be a few quin- 
arise. Columellar trabecular, well developed, largo, with a papillary 
upper surface. 
