Its upper surface is 
76 
and to the inner ends of the septa, 
probably, though not positively, papillate. 
Type specie s; Trochosmilia insignia Duncan (= T . insignis 
D. + T. argut a Dunoan (non Reuss), Quart. Jour. Geol. Soc. London, 
vol. xxix, p. 552, pi. xix, figs. 2, 2a, and also fig. 3. 
Distribution : Old Tertiaries of St. Bartholomew, West 
Indies. 
Remarks : How Duncan ever referred his Trochosmilia in- 
signia to Trocho smilia passes my comprehension. Prof. A. G. 
Hogbom of the University of Ups ala has kindly loaned me Duncan’s 
types. A large portion of the above description is based on 
Duncan’s type specimen. I had prepared two thin sections, two 
polished transverse sections and one polished longitudinal sec- 
tion of other specimens. Duncan’s type (which he had cut) 
shows nearly every character, given in the preceding diagnosis, 
that can be seen on a transverse section. His figure of the 
transverse section (pi. xix, fig. 2a) clearly indicates perforate 
