31 
IVerita semirugosa Reoluz, 
Taf. 1. Fig. 5. 6. Taf. 5 Fig. 6—9. 
Die weiss und schwarzbunte Nerita, Chemnitz Conch. Cab. V S. 291. — Nerita histrio 
(non Linne) Gmelin syst. nat. ed, XUI p. 3681. 
A) Lister hist, conch. tab. 596, fig. 11. 
Seba thesaur. tab. 59, fig. 11, 
Nerita maura Recluz in Revue zool. 1842 p. 179. 
— raaxima var. Recluz in Journ. de Conch. I p. 284. 
— histrio (non L.) Reeve conch. ic. fig. 27. 
Ab) Seba thesaur. tab. 59, fig. 12. — Knorr Vergnüg. VI, Taf. 13, Fig. 2. 
Nerita atrata (non Gmelin) Lamarck an. s. vert. VI p. 191 (nach Recluz). 
— maura var. Recluz in Revue zool. 1842 p. 180. 
B) Chemnitz Conch. Cab. V Taf. 190, Fig. 1948, 1949. 
Nerita Chemnitzii Recluz in Revue zool. 1341 p. 103; Journ. d. Conch. I p. 284. 
— semirugosa (Recluz) Reeve conch, ic. Fig. 19a,b. — Sowerby thes. f. 1 und 16. 
C) Argenville conchyl. pl. 7 Fig. S; deutscheAusgabeS.il 170; Favanne pl. 10 unten fig. 3. 
Chemnitz a. a. 0. Fig. 1960, 1961 (unsere Taf. 1, Fig. 5, 6.). 
Nerita semirugosa Recluz in Revue zool. 1841 p. 102; Journ. d. Conch, I p. 283. 
— Maura (Recluz) Reeve conch. ic. Fig. 17 a, b. — Sowerby thes, Fig. 37 u. 43. 
Testa transverse ovata, leviter spiratim costata, albida, maculis nigris plerumque parvis 
linearibus seriatis, interdum undatis vel confiuentibus picta; spira perbrevis, paulum pro- 
minens; apertura alba, margine externo leviter denticulato, margine columellari tridentato, 
area columellari convexiuscula, supra laevi, infra transversim rugosa, retrorsum indistincte 
terminata. 
Var. A) Maura Reel., magis depressa, oblonga, maculis parvis linearibus subseriatis Fig. 6 7. 
Diam. maj. 44, min. 26, alt. 33; marg. col. 19, lat. areae 16 Millim. 
_ _ 46—52, min. 25—28, alt. 35—38 (Recluz). 
— — 33, min. 19, alt. 23; marg. col. 16, lat. ar. 12. 
— Ab) eadem, anfractu ultimo toto nigrescente. 
— B) Chemnitzii Red., oblonga, nigro-undata vel marmorata. Fig. 8. 
Diam. maj. 40 min. 26, alt. 32; marg. col. lO^la lat. areae IV 2 Millim. 
— — 33 - 20, — 26; — — 16 — — 13 — 
— C)Subglobosa, elatior, nigro-marmorata. Fig. 9 und Taf. 1 Fig. 5, 6. 
