— 237 — 

 Diagnosis JVIollusci no\i, rciimlilica; IfIcxicauHï 



incolee, 

 AuCT. H. Crosse et P. Fischer. 



ZONITES TUXTLENSIS. 



T. umhilicata, globoso-subdepressa^ tennis^ pantin ni- 

 tida, subpellucida, striis capillaceis, tenuissimis, subobli- 

 quis longitudinaliter impressa^ pallide fulvido-cornea, 

 castaneo transversim late zonata; spira pariwi elevata, 

 apice obtusula ; sutura impressa ; anfractus 5 convexius- 

 culi, regulariter accrescentes, embryonales primi \ 1/2 

 luteo-albidi, sublœvigati^ sequentes capilluceo-striati, zona 

 castanea, lata, fere lotam partem conspicuam occupante, 

 transversim cincti, ultimus sat magnus, rotundatus, zo- 

 nis 2 tra7isversis, latis ornatiis, altéra suturali, altéra 

 peripherico-basaliy basi sublœvigatus ; apertura oblique 

 lunaris, sat magna, intus livide albida, zonis transmean- 

 tibus ; peristoma simplex, margine columellari breviter 

 fornicntim reflexo, basali et externo acutis. 



Diam. maj. 22 1/2, min. 19, ait. 12 7nill. Apertura 

 11 milL longa, 9 1/2 lata. (Coll. A. Salle.) 



Habitat Tuxtla, provincice Vera Cruz dictœ, in repu- 

 blica Mexicana. (A. Salle.) 



Obs. Species Helici bilineatœ Pfeifferi colore valde vi- 

 cina, sed paulo major, globosior, minus depressa, parum 

 nitida, spira magis elevata,umbilico paulo latiore et striis 

 capillaceis, regularibiis anfractuum distinguenda. 



H. C. et P. F. 



