968 



Megalomastoma guatemalense L. Pfeiifer, Monogr. Pneumon. vol. I p. 132. 



— (Cyclostoma) Crosse & Fischer, in : J. de Conchyl. 1872 vol 20 

 p. 76. — G. B. Sowerby, Thesaurus conch. v. 3 t. 268 fig. 6. — 

 (Tomocyclus) Martens, Biologia Centn amer., Moll. p. 11. 



Tomocyclus guatemalensis P. Fischer & Crosse, in: Exped. mission scient. 

 Mexique vol. 7 II p. 124 t. 40 fig. 11. — Kobelt & Moellendorfl, 

 Catal. Pneum., in: Nachrbl. D. malak. Ges. 1897 vol. 29 p. 141. 



— Kobelt, Cyclophoridae, in: Tierreich, Heft 16 p. 270. 



Aufenthalt in Gruatemala : Vera Paz in Nord-Guatemala. — San Martin Tuxtla 

 im Süden des Staates Vera Cruz in Mexico (Boucard, Salle fide Martens). 



3. Tomocyclus simulacrum Morelet. 



(Taf. 36. Fig. 11. 12). Taf. 144. Fig. 3. 4. 



Testa anguste perforata, turrita, late truncata, fere laevigata, vix nitidula, unicolor 

 virenti-fusca vel castanea; spira elongata, sensim attenuata; sutura albido marginata, sab 

 vitro fortiore suhtilissime crenulata. Anfractus superstites ö'/a-ß convexiusculi, regulariter 

 accrescentes, ultimus circa perförationem carina filiformi distincta, versus aperturam subite 

 evanescente munitus, antice breviter descendens, subsolutus, supra carinam distinctius stria- 

 tus. Apertura verticalis, fere circularis; peristoma duplex, internum breviter porrectum, ad 

 columellam incisura peculiari subexcisum, externum late expansum, ad perförationem inter- 

 ruptum, intus concavum, supra subauriculatum, appressum. — Operculum corneum, margine 

 incrassato, medio concaviusculo; gyris medio parum distinctis, tuberculo centrali lateris in- 

 terni parum prominente. 



Alt. 35, diam. maj. 16, alt. apert. cum perist. 12, lat. 11, diam. int. 8 mm. 



Cyclostoma simulacrum Morelet, Testac. noviss. cuban. 1849 p. 22. — 

 L. Pfeiffer, in: Martini & Chemnitz, Conch. Cab. p. 267 t. 36 

 fig. 11. 22. — (Megalomastoma) L. Pfr. Monogr. Pneum. vol. 1 

 p. 131. — (M.) Tristram, in: Pr. zool. Soc. London 1861 p. 232 

 — (M.) G. B. Sowerby, Thes. Conchyl. vol. 3 t. 263 fig. 3. 4. — 

 (M. Tomocyclus) Martens, Biologia Centrali americana, Moll, 

 p. 10. — (Tomocyclus) Crosse & Fischer, in: J. de, Conchyl. 1882 

 vol. 20 p. 76. — L. Pfeiffer, Monogr. Pneum vol. 4 p. 140. — 

 P. Fischer & Crosse, Miss, scient. Mexique vol. 7 II p. 121 1. 40 

 flg. 9; t. 44 fig. 1. — Kobelt & Moellendorff, Catal. Pneum. in: 

 Nachr. D. malak. Ges. 1897 vol. 29 p. 141. — Kobelt, Cyclopho- 

 ridae, in: Tierreich, Heft 16 p. 270. 



