112 GOES, RETICULARIAN RHIZOPODA OF THE CARIBBEAN SEA. 



Pulvin. saeeulata Pakk. et Jones, 1876, For. English Channel; A. N. H. (4) 17, p. 284, 



figg- 1—3. 

 Rotalina eoneamerata Will., 1858, (partim) Brit. rec. foramf. p. 62, ligg. 101 — 103. 

 1) infundibulum Costa, 1854, Pal. Nap. 2, p. 237, t. 14, fig. 9. 



» repanda var. elegans Park. et .Jones, 1865, North. Atl. and Aret. Oceans.; Phil. Träns. 



155, 1, p. 397, t. 16, figg. 44—46. 

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



1 — 3 (a Pulvin. Schreibersi d'Okb. vix diversa). 

 « Cordieriana d'Orb., 1839, Craie bl. Paris; Mera. Soc. geol. Fr. 4, p. 33, t. 3, figg- 



9—11. 

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



flg. 7, t. 11, fig. 1 (Pulvin. Michelianpe d'Orb. propinqua). 

 n floseuliformis Schwag., 1866, For. Kar.-Nikobar; Novara Reise, geol. Th. 2. 2, p. 262, 



t. 7, fig. 109. 

 Pulvin. prominens Rss., 1869, Oligocän. von Gaas; Wien. Ak. Öitz.-Ber. 59, p. 463, t. 3, 



fig. 2. 

 » Broeekiana Brady, 1876, Carb. and Perra. förf.; Pal. Soc, 30, p. 140, i. 6, fig. 12. 



Pulvinuliiia elegans var. trochus Röm. 



Tab. VIII, figg. 286—288. 



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

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

 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 miich developed specimens are 

 scarce. 



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



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



Fijf. 288: edgfe-view. 



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



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

 ? » mammiHata Röji., ibid. p. 388, t. 3, fig. 48. 



» trochus Rss., 1855, Tert. Schioht. nördl. u. mittl. Deutschl.; Wien. Ak. Sitz.-Ber. 



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



Pulviimliua Meiiardii dOrb. 



Tab. VIII, figg. 289—295. 



The mofe 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 



