a 
I. Abschnitt: 
b) Medium, nautiloid forms witn porous or dendritic aperture, Pl. XII. 
figs. 16, 17. (Unser Fig. 16, 48, 49 etwa.) 
Type—Peneroplis pertusus, Forskäl, sp. 
Nautilus pertusus, Forskal, 1775, Deser. Anim., p. 125, No. 65. 
planatus, var. @&, Fichtel and Moll, 1803, Test. Mier., 
Di, PR VI. na bire: 
Spirolina ee depressa, Lamarck, 1804, Abe. du Mus., vol. V. 
p- 245, No. 
Dendrkzns en‘ d’Orbigny, 1826, At. Sci. Nat., vol. VII. 
p- 285, pl. XV. os 6, 7; — Modele, No. 21. 
Benson elegans, Id. 1839, Foram. Cuba, p: 79, pl. VI. fies. 1, 2. 
Dendritina antillarum, Id. Ibid. p. 77, pl. VII. fies. 3—6. 
Peneroplis proteus (pars), Id. Ibid. p. 78, pl. VII. fie. 11. 
id pulchellus, Id. 1839, Foram. Amer. MEerid., p. 32, pl. II. 
fies. 5, 6. 
Dendritina hauerii, Id. 1846, For. Foss. Vien., p. 134, pl. VII. fies. 1, 2. 
r juleana, Id. Ibid. p. 134, pl. VII. fies. 3, 4. 
e- elegans, Id. Ibid. p. 135, pl. VIL fies. 5, 6. 
Peneroplis planatus (young), Williamson, 1858, Rec. For. Gt. Br., 
p- 45,:pl. DIL Ng,, 83; 
Peneroplis pertusus, Jones, Parker and Brady, 1865, Foram. Crag, 
p- 19. 
Dendritma arbuscula, Id. Ibid. p. 17, pl. III. figs. 48, 49. 
Peneroplis pertusus, Moebius, 1880, Foram. von Mauritius, p. 78, 
pl. III. figs. 9—12. 
” 
c) Narrow compressed speeimens, Pl. XIII. figs. 18, 19, 22. (Unser Fig. 
28, 29, 30, 31 etwa.) 
Type—Peneroplis arietinus, Batsch, sp. & 
„Cornu hammonis“, ete., Plancus, 1760, Conch. min. not., p. 120, 
pl. I. fig. X. 
Nautilus umbilicatus, Linne, 1767, Syst. Nat., 12 ed., p. 1163, 278. 
semilituus, Id. Ibid. p. 1163, 280. 
" (Lituus) arietinus (pars), Batsch, 1791, Conch. Seesandes, 
pP: 4, pl VEhe} 15, % 
Peneroplis planatus, d’Orbigny, 1826, Ann. Sci. Nat., vol. VIL p. 285, 
No. 1; — Modele, No. 48. 
Peneroplis proteus (pars), Id. 1839, Foram. Cuba, p. 78, pl. VI. fies. 9, 10. 
rR) 
