120 GOÉS, THE RETICULARIAN RHIZOPODA OF THE CARIBBEAN SEA. 



Cornuspira foliace.i Phil. 



Tab. IX, figg. 308—310. 



This Avidely diffused forin attains a pretty high development on the chalk-bottom 

 Its shape is vcry variable, according to the inore or less rapid incrcase of the breadth 

 of its convolutioiis. Soine of the inore marked stria3, which like septal-lines closely 

 adorn the surface, look very much like septa when viewed in transmitted light. 



It is not uncommon on the chalk-bottoni. It seems to reach its highest deve- 

 lopment in the arctic seas, where it occurs in shallow water sometimes in good 

 numbers. 



Fig. 308: a halfgrown specimen with more numerous and narrow convolutions. 



Fig. 309: large specimen with unusually sudden increase of the last convolution. 



Fig. 310: the edge with the aperture. 



Syn. Orbis foliaceus Phil., 1844, Enumer. Mollusc. Sicil. 2, p. 147, t. 24, fig. 26. 



Opereulina striata, plicata Czjz., 1847, Foss. for. Wien. Beck.; Haid. nat. Abh, 2. i, p. 146, t. 12, 



figg. 10—11; t. 13, figg. 12—13. 

 Spirillina foliaeea Williams., 1858, Brit. reo. for, p. 91, figg. 199 — 201. 



Cornusp. rugulosa llss., 1855, Tert. Sch. iiordl. ii. mittl. DeutscliL; Wien. AJj. Sitz.-Ber, 1. 18, 



p. 222, t. 1, fig. 1. 

 Opereulina earinata, ammonitiformis Costa, 1854, Pal. Nap. 2, p. 209, t. 17, figg. 15 — 16. 

 Cornuspira planorbis Schultze, 1854, Org. Polytlial. p. 40, t. 2, lig. 21. 



Bornemanni Ess., 1863, Sept. Thon Oflfenbach. Wien. Ak. Sitz.-Ber. 1. 48, p. 39, t. 1, 

 fig. 3. 

 -> Reussi (BoRNEM.) Ess., 1865, Deutsch. Septarienthon; Wien. Ak. Dksclir. 1. 25. i, 



p. 121, t. 1, fig. 10. 

 » foliaeea Parkek et Jones, 1865, North. Atl. and Aret. Oceans; Phil. Träns. 155. 1, 



p. 408, t. 15, fig. 33. 

 B » Park. et Jones, Bradv, 1866, Crag. For.; Pal. Soc. 19, p. 3, t. 3, figg. 



52—54. 

 Opereulina involvens Rss., 1849, Neue For. Wien. Beck.; Wien. Ak. Dkschr. 1. i, p. 370, t. 46, 



fig. 20. 

 Cornuspira involvens Rss., 1863, Sept. Thon. Offenbach; Wien. Ak. Sitz.-Ber. 1. 48, p. 39, t. 1, 



fig. 2. 

 Hken., 1875, Clav. Szab. Sch. p. 19, t. 1, fig. 2. 

 " oligogyra Hken., ibid. p. 20, t. 1, fig. 10. 



" tenuissima Sciiwag., 1863, Jnrass. Soh.; Wiirtomb. Nat. Verein. Jhrhft. 21, p. 94, t. 2, 



fig. 5. 

 ? » paehygyra GiJMB., 1869, Cassian u. Raibl. Schiclit.; Ostorr. geol. Reichsanst. Jhrb. 19, 



p. 178, t. 5, figg. 9—10. 

 Opereulina angigyra Rss., 1849, Neue for. österr. tert. Beckcn; Wien. .'Vk. Dkschr. 1. 1, p. 370, 



t. 46, fig. 19. 

 Cornuspira polygyra Rss., 1863, Sept. Thon Offenbach; Wien. Ak. Sitz.-Ber. 1. 48, p. 39, t. 1, 



fig. 1. 

 ). » Hken., ibid. p. 19, t. 1, fig. 11: t. 2, fig. 1. 



» nummulitiea GiJMU., 1868, Nordalp. Eociin.; K. Bayr. Ak. Wiss. Al)h. 1. 10. 2, p. 604, 



t. 1, fig. 5. 

 » Archimedis, elliptica Stache, 1865, Tert. Mergel Whaingar. Hafen; Novara Reise, geol. 



Th. 1. 2, p. 180—181, t. 22, figg. 1—2. 



