408 INDEX TO THE GENERA AND 



SILICINA, Bornemann, 1874. Zeitschr. deutsch. geol. Ges. xxvi, 1874, 731. 



[= Involutina.~\ 

 limitata (Terq.). Bornemann, Zeitschr. deutsch. geol. Ges. xxvi, 1874, 



733. [Involutina, 1863.] 

 polymorpha (Terq.). Bornemann, Zeitschr. deutsch. geol. Ges. xxvi, 



1874, 732. [Involutina, 1863.] 



Schwager, Boll. R. Cora, geol, Ital. viii, 1877, 26, pi., 80. 



SIMPLORBITES, de Gregorio, 1882. Fossili dint. Pachino, 1882, 10. [" Parte- 



cipano anclie del gen. Orbitolites e Orbitoides, e piu ancora del gen. 



Hymenocyclus," . . .] 

 cupulimis, de Gregorio. Fossili dint. Pachino, 1882, 11, vi, 21a, b, 



22a, b. 

 expansopsis, de Gregorio. Fossili dint. Pachino, 1882, 12, vi, 23 and 



24. 



nummulitinus, de Gregorio. Fossili dint. Pachino, 1882, 12, vi, 28a, b. 



pachinensis, de Gregorio. Fossili dint. Pachino, 1882, 12, vi, 27. 



perforatseformis, de Gregorio. Fossili dint. Pachino, 1882, 13, vi, 



25a, b. 



spongians, de Gregorio. Fossili dint. Pachino, 1882, 13, vi, 30a, b, c. 



uniconicus, de Gregorio. Fossili dint. Pachino, 1882, 12, vi, 26a, b, c. 



SIPHOGENERINA, Schlumberger, 1883. Feuille Jeun. Nat., Aug. 1883, 117. 

 COstata, Schlumb. Feuille Jeun. Nat., Aug. 1883, 118, fig. B. [Referred 



to Sagrina raphanus by Brady.] 

 glabra, Schlumb. Feuille Jeun. Nat., Aug. 1883, 118, iii, 1 and la. 



[Referred to Sagrina columellaris by Brady.] 



ocracea, Schlumb. Feuille Jeun. Nat., Aug. 1883, 118, fig. C. 



SIPHONEMA, J. G. Bornemann, 1886. Nova Acta Acad. Leop. Carol. Li, pt. 1, 



1886, 17. [Referred to Girvanella by G. J. Hinde, Geol. Mag. dec. 3, 



IV, 1887, 227 ; described by Bornemann as an alga.] 

 ? arenaceum, Bornemann. Idem, 19, ii, 3. [Previously noticed in 



Zeitschr. deutsch. geol. Ges. xxxv, 1883, 274, as "rundlichen Korpern, 



welche undeutliche Stromatoporenstruktur zeigeu." 



incrustans, Bornemann. Idem, 18, ii, 1 and 2. 



SIPHONINA, Reuss, 1849. Denkschr. k.' Ak. Wiss. Wien, i, 1850, 372. 



fimbriata, Reuss. Denkschr. k. Ak. Wiss. Wien, i, 1850, 372, xlvii, 6. 



Terrigi, Atti Ace. Pont. Nuovi Lincei, xxxiii, 1880, 212, 



iv, 69. 



Terq., M^m. Soc. g^ol. France, [3], ii, 1882, 84, viii 



(xvi), 16a-c. 

 puteolana, Costa. Atti Accad. Pontaniana, vii, fas. 2, 1856, not descr., 



xxvii, 22. 

 reticulata (Czj.). Bronn, Lethaea Geognostica, ed. 3, m, 1853-56, 227, 



xxxv2, 23a, b, c. [Rotalina, 1848.] 



Schwager, Boll. R. Com. geol. Ital. vili, 1877, 26, pi., 59. 



reticulata, Reuss. Models, No. 48, 1865 (Catal., No. 86, 1861). [= 



Planorbidina.'l 

 Sitophoros. Mercatus, Metallotheca, 1719, 285, fig. ; and 286, fig. [= Nummu- 



lites.'] 

 SOLDANIA, d'Orbigny, 1826. Ann. Sci. Nat. vii, 1826, 281. 



annulata, d'Orbigny. Ann. Sci. Nat. vii, 1826, 282, No. 6. 



T= Cornuspira ? ; Spirillinaf ; see H ammonia trivoluta. 



carinata, d'Orbigny. Ann. Sci. Nat. vii, 1826, 281, No. 1. 



Cristellaria ; see Nautili ; and Cristellaria. 



elegans, Ehr. Abhandl. k. Ak. Wiss. Berlin, 1838, 134. 



Ehr., Mikrogeologie, 1854, xxxvii, viii, 6. [A cast ; = 



C^vist€lla7^a . 1 

 limia, d'Orbigny. Ann. Sci. Nat. vii, 1826, 281, No. 4. 



:= Cornusp. foliacea (?) (Phil.); see Hammonice circulares, 



etc. ; and Frumentaria 4 speciei. 



