338 CRETACEOUS GASTROPODA 
9. Nerita ornatissima, D’Orb., known only from a short description in the ‘ Prodrome’; it appears 
to belong to the type of our Nerita divaricata and Carolina, to which also the next 16 species have 
to be referred. 
10. N. Bourgeoisiana, D’Orb. 
11-12. NV. glebosa and N. cestophora, Ryckholt. 
13. WN. nodosa, Geinitz, sp. (Natica id., Geinitz, and Nat. nodoso-costata, Reuss). 
14. Nerita Zekeliana, Stol., olim Natica rugosa, Zekeli, and Natica Rimeri, Reuss; (vide Sitz. 
Akad., Wien, LII, 1865, Revision, ete., p. 48). 
15. WN. Hornesiana, Zek., sp. (Natica id., Zek.) vide ibidem., p. 49. 
16. WN. Orbignyi, Guéranger, 1867, Album paléont. de la Sarthe, pl. 10, fig. 7 
17. NN. parvula, Binkhorst, Gast. et. Ceph. craie Limbg., 1861, p. 44, pl. 4, fig. 1. 
18. NV. rugosa, Honinghaus, zidem., p. 41. This species has been referred to Ofostoma, 
d’Archiae, which, as I have already stated, appears to have been founded upon imperfect specimens 
of Nerite. There is very little doubt that the two next cretaceous species 
19-25. Otostoma Tehihatcheffi and ponticum of d’Archiac, belong to the same group of Nerite. 
(Vide Bull. Soc. Géol., France, XVI, p. 873, ete., and Tchihatcheff’s Asie Min., Paléont., 1866, 
pp. 88-89). I may also quote Ofostoma Archiaci and Fourneli of H. Coquand from Algiers (Geol. 
and Pal. Prov. Constantine, 1862, p. 180, pl. 4, figs. 10-12). It is not improbable, that the 
following species, described under different generic names, belong also to the same section of Nerita, 
namely, Turbo Munda, Sharpe (Quart. Journ. Geol. Soc., Lond., 1850, VI, p. 194, pl. 20, fig. 7) ; 
Nat. Rémeri, Geinitz, (Quadersandsteingebirge, 1849-50, p. 128); Nat. dichotoma, Geinitz 
(Char. p. 48, pl. 13, fig. 5; pl. 18, figs. 14 and 16,* and Kieslingswalda, p. 10, pl. 1, fig. 19), and 
perhaps some others. 
26. Nerita montis-sancti-Petris, Binkhorst (Monog. Gast et Ceph. craie de Limbourg, 1861, 
p. 40), is a spirally striated species, and allied to, if not identical with, the next doubtful 
27. (?) IV. costulata, Romer (Verst. Nord. Kreidegeb., p. 82, pl. 12, fig. 12). 
28. Neritina (Nereis) densata, Con. (Journ. Acad. Nat. Soc., Phil., IV, 2nd Ser., p. 288, 
pl. 46, fig. 37). Conrad proposed (loc. cit., p. 289) the sub-generic name Nereis (non idem. Lin. and 
others) for this and the recent species Neritina reclivata, Say, on account of their having a thick 
shell and a rounded callous columella. I do not think, however, that their shell is thicker,—so far at 
least as the recent species is concerned—, than that of typical species of Nerttina, like N. Smithiz, 
Cumingiana, bicolor, and others; neither does the columella of the recent or the fossil species differ 
in its rowndness (?) from that of the other known species. 
29. Nerita deformis, Gabb (Pal. Calif., 1864, I, p. 137, pl. 21, fig. 96), is based upon a rather 
imperfect specimen, of which Mr. Gabb says “in fact, except its distorted (naturally ?) outline, 
it has almost no tangible specific character.” (!) 
30. Nerita euneata, Gabb (bid. pl. 21, fig. 97) is a fine species of the sub-generic type Vedates. 
31. WV. plebeia, Reuss., is probably-a Neritina, belonging to the sub-generic type Vitta. 
32. Neritina Cenomanensis, Guéranger, Album Pal. d. 1. Sarthe, 1867, pl. 10, fig. 9 (Werita id. 
Guéranger, Repertoire, etc., 1853, p. 31. 
33. WN. Goldfussi, Kefst., is a Deianira; it occurs n “the Alpine Gosau-deposits. 
34-35. Deianira bicarinata, Zek. sp. and D. Hornesiana, Stol., are from the same deposits as the 
last (vide Sitzb. Akad., Wien, 1860, Vol. XXXVIII, pp. 488-492 ; and 1865, Vol. LII, Revision der 
Gosau-Gastropoden, pp. 49—51). 
Doubtful species of Neri71Ip2 are Pileopsis arquata, Mist. (Nerita id. d’Orb.) and Natica ? 
Retzii, Nillson, both of which, however, could belong to that family, and with regard to the last 
2 
* This figure of a cast showing the absorption of the top-whorls makes it very probable that the 
species belongs to the family Nerizipz, 
