112 GOES, RETICULARIAN KHIZOPODA OF THE CARIBBEAN SEA. 



Pulvin. sacculata PARK, et JONES, 1876, For. English Channel; A. N. H. (4) 17, p. 284, 



figg. 13. 



Rotalina concamerata WILL., 1858, (partim) Brit. rec. foramf. p. 62, tigg. 101 103. 

 infundibulum COSTA, 1854, Pal. Nap. 2, p. 237, t. 14, tig. 9. 



repanda var. elegans PARK, et JONES, 1865, North. Atl. and Arct. Oceans.; Phil. Trans. 



155, i, p. 397, t. 16, figg. 4446. 

 badensis GZJZ., 1847, Foramf. Wien. Beck.; Haid. Nat. Abh. 2. i, p. 144, t, 13, figg. 



1 3 (a Pulvin. Schreibersi D'ORB. vix diversa). 

 Cordieriana D'ORB., 1839, Craie bl. Paris; Mem. Soc. geol. Fr. 4, p. 33, t. 3, tigg- 



911. 

 semiglobosa Rss., 1862, Nordd. Mils u. Gault; Wien. Ak. Sitz.-Ber. 1. 46., p. 85, t. 10 



flg. 7, t. 11, fig. 1 (Pulvin. Michelianne D'ORB. propinqua). 

 flosculiformis SCHWAO., 1866, For. Kar.-Nikobar; Novara Reise, geol. Th. 2. 2, p. 262, 



t. 7, tig. 109. 

 Pulvin. prominens Rss., 1869, Oligociin. von (Jaas; Wien. Ak. Sitz.-Ber. 59, p. 463, t. 3, 



fig. 2. 

 Broeckiana BRADY, 1876, Carb. and Perm, forf.; Pal. Soc. 30, p. 140, t. 6, fig. 12 



Pulvinulina elegans var. trochus ROM. 



Tab. VIII, figg. 286288. 



This form is remarkable for its strongly developed urnbo, which as a solid, highly 

 polished, porcellaneous cupola so covers nearly the entire spiral-side, that the margina 

 part only of the 2 or 3 latest segments are visible. On the opposite side the umbi- 

 lical boss is very small or is absorbed in the raised septal lines or in starlike exogenous 

 shellsubstance. It is slightly marginated. 



It is very common on the chalk-bottom, but much developed specimens are 

 scarce. 



Fig. 286: apertural side with its starlike rays of thickened septal marks. 



Fig. 287 : the spire-side with its cupola. 



Fig. 288: edge-view. 



Syn. Rotalia trochus (MUNST.) ROM., 1838, Nordd. tert. Meeress.; Leonh. u. Bronn. Jhrb. 1838, 



p. 388, t. 3, fig. 47. 

 ? mammillata ROM., ibid. p. 388, t. 3, fig. 48. 



trochus Rss., 1855, Tert. Schicht. nordl. u. mittl. Deutschl.; Wien. Ak. Sitz.-Ber. 



1. 18, p. 242, t. 5, fig. 55. 



Pulvinulina Menardii D'ORB. 



Tab. VIII, figg. 289295. 



The more conspicuous features of this elegant rhizopode are its flatness, its broad 

 keel, its large and few chambers and its crenulated or jagged apertural lip, which is 

 often produced into a sort of valve. The margin of the young individuals is often 

 laciniated. As is the case with the whole class, its vertical diameter is liable to some 



