MOLLUSQUES TERRESTRES ET FLUVIATILES. 
155 
lion défectueuse de M. Gray, et nous n avons guère, sous ce rapport, à excepter 
que M. MôrcIiL 
SECTIO I. 
MORELETIA, Gray. 
1. ZONITES EüRYOMPHALUS, Pfeiffer. 
(PI. VII, %. 1, 1« et ib.) 
Helix euryomphala, Pfeiffer, Proceed. Zool. Soc. of London, part XIII, p. 71 , i865. 
Helix euryomphala, Pfeiffer, Monog. Heliceorum, vol. I, p. 107, i848. 
Helix cymbalum , Morelet, Test, noviss. I, 11° 1, p. 7, 18Z19. 
Helix euryomphala , Morelet, Test, noviss. II, p. 27, i85i. 
Helix euryomphala, Morelet, Journ. de Conchyliologie, vol. II, p. ih , pi. II, fig. 6, i85i. 
Helix euryomphala, Pfeiffer, dans Gliemnitz, ed. nov. p. 896, pl. GXLIV, fig. 1, 2, i852. 
Helix euryomphala, Reeve, Conch. Iconica, 533, pl. XGVII, 1882. 
Helix euryomphala, Pfeiffer, Monog. Heliceorum, vol. 111, p. 101, i853. 
Patula euryomphala , Pfeiffer, Vers. p. 126, i855. 
Moreletia euryomphala, Gray, Catal. Pulmon. p. i48, i855. 
Helix euryomphala, Pfeiffer, Monog. Heliceorum, vol. IV, p. 97, 1859. 
Zonites euryomphalus [Moreletia), Albers, Heliceen, éd. Martens, p. 67, i86o. 
Helix euryomphala, Tristram, Proceed. Zool. Soc. qf London, p. 280, 1861. 
Helix euryomphala , Tristram, Proceed. Zool. Soc. of London, p. 1 , i863. 
Helix euryomphala, Môrch, Journ.de Conchyliologie, vol. XIII, p. 384, i865. 
Helix euryomphala, Pfeiffer, Monog. Heliceorum, vol. V, p. 161, 1868. 
Testa pervie umbilicata, orbiculato-convexa , tenuis, pellucida, sat nitida, t'egulariter et tenuissime coslulato- 
striata, lineis concentricis, raris, vix conspicuis obsoletissime decussata, sub epidermide olivaceo-cornea , per- 
stante, albida; spira parum elevata, apice obtusa; sutura sat profunde impressa; anfractus 6 convexmscuh , 
ultimus dilatatus, subdepressus , non descendens, basi distantius striatus, nitidissimus; apertura oblique lunato- 
ovalis, intus submargaritacea , albida; peristoma simplex, rectum, colore olivaceo-nigricante limbatum, margi- 
nibus convergentibus , columellari intus leviter dilatato, albulo, basali et externo acutis. 
Animal pallide griseum, rugis saturatioribus, usque ad buccam perstantibus longitudinali ter sulcatum; 
caput cæruleo-nigricans ; tentacula nigra, conica; processus labiales parvi, vivide lutei; discus a corpore sulco 
profundo , nigro separatus , transversim radiatus , pallide castaneus , postice subobtusus , poro muciparo lato , conco- 
lore perforatus. 
Diam. maj. testee ho mill., min. 3A , ait. 18 . — Apertura ij niill. longa, li lata (Mus. Parisiense). 
Habitat Coban, in provincia Vera Paz dicta, Guatemala;, in montibus nemorosis i^h. Morelet); in silvis 
montanis provinciæ Vera Paz (0. Salvin); in montibus provinciœ Vera Paz dictæ (Bocourt). 
Coquille munie d’un ombilic large et laissant apercevoir les premiers tours, de 
forme orbiculaire- convexe, mince, translucide, marquée de stries costuliformes lon- 
' Journal de Conchyliologie, vol. XIII, p. 38o, i865. 
